ROOF ASSEMBLIES AND ROOFTOP STRUCTURES
International Building Code	 2001 Florida Building Code	Proposed Changes to the
Florida Building Code  [Revised 1/13/04]	
SECTION 1501
GENERAL
		SECTION 1501
GENERAL
	
1501.1 Scope. The provisions of this chapter shall govern the design, materials, construction and quality of roof assemblies, and rooftop structures.

	EXCEPTION: Buildings and structures located within the High Velocity
Hurricane Zone shall comply with the provisions of §1503.6 and §1512
through §1525.
	Revise section 1501.1 to read as follows:

1501.1 Scope. The provisions of this chapter shall govern the design, materials, construction and quality of roof assemblies, and rooftop structures.

EXCEPTION: Buildings and structures located within the High Velocity
Hurricane Zone shall comply with the provisions of §1503.6 and §1512
through §1525.	
SECTION 1502
DEFINITIONS
		SECTION 1502
DEFINITIONS
	
1502.1 General. The following words and terms shall, for the purposes of this chapter and as used elsewhere in this code, have the meanings shown herein.
BUILT-UP ROOF COVERING. Two or more layers of felt cemented together and surfaced with a cap sheet, mineral aggregate, smooth coating or similar surfacing material.
INTERLAYMENT. A layer of felt or nonbituminous saturated felt not less than 18 inches (457 mm) wide, shingled between each course of a wood-shake roof covering.
MECHANICAL EQUIPMENT SCREEN. A partially enclosed rooftop structure used to aesthetically conceal heating, ventilating and air conditioning (HVAC) electrical or mechanical equipment from view.
METAL ROOF PANEL. An interlocking metal sheet having a minimum installed weather exposure of 3 square feet (.279 m2) per sheet.
METAL ROOF SHINGLE. An interlocking metal sheet having an installed weather exposure less than 3 square feet (.279 m2) per sheet.
METAL ROOF SHINGLE. An interlocking metal sheet having an installed weather exposure less than 3 square feet (.279 m2) per sheet.
MODIFIED BITUMEN ROOF COVERING. One or more layers of polymer-modified asphalt sheets. The sheet materials shall be fully adhered or mechanically attached to the substrate or held in place with an approved ballast layer.
PENTHOUSE. An enclosed, unoccupied structure above the roof of a building, other than a tank, tower, spire, dome cupola or bulkhead, occupying not more than one-third of the roof area.
POSITIVE ROOF DRAINAGE. The drainage condition in which consideration has been made for all loading deflections
of the roof deck, and additional slope has been provided to ensure drainage of the roof within 48 hours of precipitation.
REROOFING. The process of recovering or replacing an existing roof covering. See “Roof recover” and “Roof replacement.”
ROOF ASSEMBLY. A system designed to provide weather protection and resistance to design loads. The system consists of a roof covering and roof deck or a single component serving as both the roof covering and the roof deck. A roof assembly includes the roof deck, vapor retarder, substrate or thermal barrier, insulation, vapor retarder and roof covering.
ROOF COVERING. The covering applied to the roof deck for weather resistance, fire classification or appearance.
ROOF COVERING SYSTEM. See “Roof assembly.”
ROOFDECK. The flat or sloped surface not including its supporting members or vertical supports.
ROOF RECOVER. The process of installing and additional roof covering over a prepared existing roof covering without removing the existing roof covering.
ROOF REPAIR. Reconstruction or renewal of any part of an existing roof for the purposes of its maintenance.
ROOF REPLACEMENT. The process of removing the existing roof covering, repairing any damaged substrate and installing a new roof covering. 
ROOF VENTILATION. The natural or mechanical process of supplying conditioned or unconditioned air to, or removing such air from, attics, cathedral ceilings or other enclosed spaces over which a roof assembly is installed.
ROOFTOP STRUCTURE. An enclosed structure on or above the roof of any part of a building.
SCUPPER. An opening in a wall or parapet that allows water to drain from a roof.
SINGLE-PLY MEMBRANE. A roofing membrane that is field applied using one layer of membrane material (either homogeneous or composite) rather than multiple layers.
UNDERLAYMENT. One or more layers of felt, sheathing paper, nonbituminous saturated felt or other approved material
over which a steep-slope roof covering is applied.

	1502.1 General. The following words and terms shall, for the purposes of this chapter and as used elsewhere in this code, have the meanings shown herein.
BUILT-UP ROOF COVERING. Two or more layers of felt cemented together and surfaced with a cap sheet, mineral aggregate, smooth coating or similar surfacing material.
INTERLAYMENT. A layer of felt or nonbituminous saturated felt not less than 18 inches (457 mm) wide, shingled between each course of a wood-shake roof covering.
MECHANICAL EQUIPMENT SCREEN. A partially enclosed rooftop structure used to aesthetically conceal heating, ventilating and air conditioning (HVAC) electrical or mechanical equipment from view.
METAL ROOF PANEL. An interlocking metal sheet having a minimum installed weather exposure of 3 square feet (.279 m2) per sheet.
METAL ROOF SHINGLE. An interlocking metal sheet having an installed weather exposure less than 3 square feet (.279 m2) per sheet.
METAL ROOF SHINGLE. An interlocking metal sheet having an installed weather exposure less than 3 square feet (.279 m2) per sheet.
MODIFIED BITUMEN ROOF COVERING. One or more layers of polymer-modified asphalt sheets. The sheet materials shall be fully adhered or mechanically attached to the substrate or held in place with an approved ballast layer.
PENTHOUSE. An enclosed, unoccupied structure above the roof of a building, other than a tank, tower, spire, dome cupola or bulkhead, occupying not more than one-third of the roof area.
POSITIVE ROOF DRAINAGE. The drainage condition in which consideration has been made for all loading deflections
of the roof deck, and additional slope has been provided to ensure drainage of the roof within 48 hours of precipitation.
REROOFING. The process of recovering or replacing an existing roof covering. See “Roof recover” and “Roof replacement.”
ROOF ASSEMBLY. A system designed to provide weather protection and resistance to design loads. The system consists of a roof covering and roof deck or a single component serving as both the roof covering and the roof deck. A roof assembly includes the roof deck, vapor retarder, substrate or thermal barrier, insulation, vapor retarder and roof covering.
ROOF COVERING. The covering applied to the roof deck for weather resistance, fire classification or appearance.
ROOF COVERING SYSTEM. See “Roof assembly.”
ROOFDECK. The flat or sloped surface not including its supporting members or vertical supports.
ROOF RECOVER. The process of installing and additional roof covering over a prepared existing roof covering without removing the existing roof covering.
ROOF REPAIR. Reconstruction or renewal of any part of an existing roof for the purposes of its maintenance.
ROOF REPLACEMENT. The process of removing the existing roof covering, repairing any damaged substrate and installing a new roof covering. 
ROOF VENTILATION. The natural or mechanical process of supplying conditioned or unconditioned air to, or removing such air from, attics, cathedral ceilings or other enclosed spaces over which a roof assembly is installed.
ROOFTOP STRUCTURE. An enclosed structure on or above the roof of any part of a building.
SCUPPER. An opening in a wall or parapet that allows water to drain from a roof.
SINGLE-PLY MEMBRANE. A roofing membrane that is field applied using one layer of membrane material (either homogeneous or composite) rather than multiple layers.
UNDERLAYMENT. One or more layers of felt, sheathing paper, nonbituminous saturated felt or other approved material
over which a steep-slope roof covering is applied.

SECTION 1503
WEATHER PROTECTION
		SECTION 1503
WEATHER PROTECTION	
1503.1 General. Roof decks shall be covered with approved roof coverings secured to the building or structure in accordance with the provisions of this chapter. Roof coverings shall be designed, installed and maintained in accordance with this code and the approved manufacturer’s instructions such that the roof covering shall serve to protect the building or structure.
		1503.1 General. Roof decks shall be covered with approved roof coverings secured to the building or structure in accordance with the provisions of this chapter. Roof coverings shall be designed, installed and maintained in accordance with this code and the approved manufacturer’s instructions such that the roof covering shall serve to protect the building or structure.
	
1503.2 Flashing. Flashing shall be installed in such a manner so as to prevent moisture entering the wall and roof through joints in copings, through moisture-permeable materials and at
intersections with parapet walls and other penetrations through the roof plane.
		1503.2 Flashing. Flashing shall be installed in such a manner so as to prevent moisture entering the wall and roof through joints in copings, through moisture-permeable materials and at
intersections with parapet walls and other penetrations through the roof plane.
	
1503.2.1 Locations. Flashing shall be installed at wall and roof intersections, at gutters, wherever there is a change in
roof slope or direction and around roof openings. Where flashing is of metal, the metal shall be corrosion resistant with a thickness of not less than 0.019 inch (.483 mm) (No. 26 galvanized sheet).
	Mod 484

1503.2.1 Locations.  Flashings shall be installed at (1) wall and roof intersections, (2) at gutter, (3) wherever there is a change in roof slope or direction, this requirement does not apply to hip and ridge junctions, and (4) around roof openings.  Where flashing is of metal, the metal shall be corrosion-resistant with a thickness of not less than 0.019 inch (26 gage (0.551 mm) galvanized sheet).  not less than provided in Table 1503.2.2.  	1503.2.1 Locations. Flashing shall be installed at wall and roof intersections, at gutters, wherever there is a change in
roof slope or direction,  this requirement does not apply to hip and ridge junctions and around roof openings. Where flashing is of metal, the metal shall be corrosion resistant with a thickness of not less than 0.019 inch (.483 mm) (No. 26 galvanized sheet)  not less than provided in Table 1503.2.2.  

	
Table 1507.2.9.2 Valley Lining Material. 	Mod 593

Table 1507.3.9.2 Valley Lining 1503.2.2 Metal Flashing Material

Material
Minimum 
Thickness (inches)
Gage
Weight 
(lbs per sq ft)

Copper

1 (16 oz)

Aluminum
 0.024

Stainless Steel

    28

Galvanized Steel
0.0179
26 (zinc coated G90)

Aluminum Zinc
Coated Steel

.0179

26  (AZ50 Alum Zinc)

Zinc Alloy
0.027

Lead

2.5

Painted Terne

20 1.25 
(20 oz)

	Note:  This is proper location for this Table.
Replace Table 1507.2.9.2, IBC with the following Table: 

Table 1507.3.9.2 Valley Lining 1503.2.2 Metal Flashing Material

Material
Minimum 
Thickness (inches)
Gage
Weight 
(lbs per sq ft)

Copper

1 (16 oz)

Aluminum
 0.024

Stainless Steel

    28

Galvanized Steel
0.0179
26 (zinc coated G90)

Aluminum Zinc
Coated Steel

.0179

26  (AZ50 Alum Zinc)

Zinc Alloy
0.027

Lead

2.5

Painted Terne

20 1.25 
(20 oz)

	
1503.3 Coping. Parapet walls shall be properly coped with noncombustible, weatherproof materials of a width no less
than the thickness of the parapet wall.
	Mod 633

1511.6.2 Coping.  All parapet walls shall be properly coped or sealed with noncombustible, weatherproof materials of a width no less that the thickness of the parapet wall.
	1503.3 Coping. Parapet walls shall be properly coped or sealed with noncombustible, weatherproof materials of a width no less than the thickness of the parapet wall.
	
	Mod 634    (Needs new section)

1511.6.4.1  Where required for roof drainage, a scupper shall be placed level with the roof surface in a wall or parapet.  The scupper shall be located as determined by the slope and the contributing area of the roof.  The exterior facing or lining of a scupper, if metal, shall be the same as valley lining flashing material required by 1503 through 1510 for the particular type of covering specified for the building.  For other type materials, follow manufacturer’s specifications.

Mod 635

1511.6.4.3.  When other means of drainage of overflow water is not provided, overflow scuppers shall be placed in walls or parapets not less than 2 inches (51 mm) nor more than 4 inches (102 mm) above the roof deck finished roof covering and shall be located as close as practical to required vertical leaders or downspouts or wall and parapet scuppers.  An overflow scupper shall be sized in accordance with the Florida Building Code, Plumbing.
	Add a new section 1503.4.2 Scupper.  

1511.6.4.1  Where required for roof drainage, a scupper shall be placed level with the roof surface in a wall or parapet.  The scupper shall be located as determined by the slope and the contributing area of the roof.  The exterior facing or lining of a scupper, if metal, shall be the same as valley lining flashing material required by 1503 through 1510 for the particular type of covering specified for the building.  For other type materials, follow manufacturer’s specifications.

Add as a new section 1503.4.3 

1511.6.4.3  When other means of drainage of overflow water is not provided, overflow scuppers shall be placed in walls or parapets not less than 2 inches (51 mm) nor more than 4 inches (102 mm) above the roof deck finished roof covering and shall be located as close as practical to required vertical leaders or downspouts or wall and parapet scuppers.  An overflow scupper shall be sized in accordance with the Florida Building Code, Plumbing.
	
[P] 1503.4 Roof drainage. Design and installation of roof drainage systems shall comply with the International Plumbing Code.
		[P] 1503.4 Roof drainage. Design and installation of roof drainage systems shall comply with the Florida Plumbing Code.
	
1503.4.1 Gutters. Gutters and leaders placed on the outside of buildings, other than Group R-3 as applicable in Section
101.2, private garages and buildings of Type V construction, shall be of noncombustible material or a minimum of
Schedule 40 plastic pipe.
	
	1503.4.1 Gutters. Gutters and leaders placed on the outside of buildings, other than Group R-3 as applicable in Section
101.2, private garages and buildings of Type V construction, shall be of noncombustible material or a minimum of
Schedule 40 plastic pipe.
	
1503.5 Roof ventilation. Intake and exhaust vents shall be provided in accordance with Section 1203.2 and the manufacturer’s installation instructions.
		1503.5 Roof ventilation. Intake and exhaust vents shall be provided in accordance with Section 1203.2 and the manufacturer’s installation instructions.

	§1503.4.4 Protection against decay and termites. Condensate lines and
roof downspouts shall discharge at least 1 foot (305 mm) away from the
structure sidewall, whether by underground piping, tail extensions, or
splash blocks.  Gutters with downspouts are required on all buildings with
eaves of less than 6 inches (152 mm) horizontal projection except for
gable end rakes or on a roof above another roof.

	Add s. 1503.4.4, FBC as a new section 1503.6. 	
SECTION 1504
PERFORMANCE REQUIREMENTS
		SECTION 1504
PERFORMANCE REQUIREMENTS	
1504.1 Wind resistance of roofs. Roof decks and roof coverings shall be designed for wind loads in accordance with Chapter
16 and Sections 1504.2, 1504.3 and 1504.4.
		1504.1 Wind resistance of roofs. Roof decks and roof coverings shall be designed for wind loads in accordance with Chapter
16 and Sections 1504.2, 1504.3 and 1504.4.
	
1504.1.1 Wind resistance of asphalt shingles. Asphalt shingles shall be designed for wind speeds in accordance
with Section 1507.2.7.	
	1504.1.1 Wind resistance of asphalt shingles. Asphalt shingles shall be designed for wind speeds in accordance
with Section 1507.2.7.
	
1504.2 Wind resistance of clay and concrete tile. Clay and concrete tile roof coverings shall be connected to the roof deck in accordance with Chapter 16.
		1504.2 Wind resistance of clay and concrete tile. Clay and concrete tile roof coverings shall be connected to the roof deck in accordance with Chapter 16.
	
1504.3 Wind resistance of nonballasted roofs. Roof coverings installed on roofs in accordance with Section 1507 that are
mechanically attached or adhered to the roof deck shall be designed to resist the design wind load pressures for cladding in
Chapter 16.	
		1504.3 Wind resistance of nonballasted roofs. Roof coverings installed on roofs in accordance with Section 1507 that are
mechanically attached or adhered to the roof deck shall be designed to resist the design wind load pressures for cladding in
Chapter 16.	
	
1504.3.1 Other roof systems. Roof systems with built-up, modified bitumen, fully adhered or mechanically attached
single-ply through fastened metal panel roof systems, and other types of membrane roof coverings shall also be tested
in accordance with FM4450, FM4470, UL580 or UL1897.		1504.3.1 Other roof systems. Roof systems with built-up, modified bitumen, fully adhered or mechanically attached
single-ply through fastened metal panel roof systems, and other types of membrane roof coverings shall also be tested
in accordance with FM4450, FM4470, UL580 or UL1897.

1504.3.2 Metal panel roof systems. Metal panel roof systems through fastened or standing seam shall be tested in accordance
with UL 580 or ASTM E 1592.
	
	1504.3.2 Metal panel roof systems. Metal panel roof systems through fastened or standing seam shall be tested in accordance
with UL 580 or ASTM E 1592.

1504.4 Ballasted low-slope roof systems. Ballasted low-slope (roof slope < 2:12) single-ply roof system coverings installed
in accordance with Section 1507 shall be designed in accordance with ANSI/SPRI RP-4.
		1504.4 Ballasted low-slope roof systems. Ballasted low-slope (roof slope < 2:12) single-ply roof system coverings installed
in accordance with Section 1507 shall be designed in accordance with ANSI/SPRI RP-4.
	
1504.5 Edge securement for low-slope roofs. Low-slope membrane roof systems metal edge securement, except gutters,
installed in accordance with Section 1507, shall be designed in accordance with ANSI/SPRI ES-1, except the basic
wind speed shall be determined from Figure 1609.
		1504.5 Edge securement for low-slope roofs. Low-slope membrane roof systems metal edge securement, except gutters,
installed in accordance with Section 1507, shall be designed in accordance with ANSI/SPRI ES-1, except the basic
wind speed shall be determined from Figure 1609.
	
1504.6 Physical properties. Roof coverings installed on low-slope roofs (roof slope < 2:12) in accordance with Section 1507 shall demonstrate physical integrity over the working life of the roof based upon 2,000 hours of exposure to accelerated weathering tests conducted in accordance with ASTM G 152, ASTM G 155 or ASTM G 154. Those roof coverings that are subject to cyclical flexural response due to wind loads shall not demonstrate any significant loss of tensile strength for unreinforced membranes or breaking strength for reinforced membranes when tested as herein required.

1504.5 Physical properties. Roof coverings installed on low slope roofs in accordance with 1508 shall demonstrate physical integrity over the working life of the roof based upon 2,000 hours of exposure to accelerated weathering tests conducted in accordance with ASTM G 23 152, ASTM G 153, ASTM G 26 G 155 or ASTM G 53 154. Those roof coverings that are subject to cyclical flexural response caused by wind loads shall not demonstrate any significant loss of tensile strength for unreinforced membranes or breaking strength for reinforced membranes where tested as herein required.	1504.6 Physical properties. Roof coverings installed on low-slope roofs (roof slope < 2:12) in accordance with Section 1507 shall demonstrate physical integrity over the working life of the roof based upon 2,000 hours of exposure to accelerated weathering tests conducted in accordance with ASTM G 152, ASTM G 153, ASTM G 155 or ASTM G 154. Those roof coverings that are subject to cyclical flexural response due to wind loads shall not demonstrate any significant loss of tensile strength for unreinforced membranes or breaking strength for reinforced membranes when tested as herein required.
	
1504.7 Impact resistance. Roof coverings installed on low-slope roofs (roof slope < 2:12) in accordance with Section 1507 shall resist impact damage based on the results of tests conducted in accordance with ASTM D 3746, ASTM D 4272, CGSB 37-GP-52M or FM 4470.
		1504.7 Impact resistance. Roof coverings installed on low-slope roofs (roof slope < 2:12) in accordance with Section 1507 shall resist impact damage based on the results of tests conducted in accordance with ASTM D 3746, ASTM D 4272, CGSB 37-GP-52M or FM 4470.
	
SECTION 1505
FIRE CLASSIFICATION
		SECTION 1505
FIRE CLASSIFICATION	
1505.1 General. Roof assemblies shall be divided into the classes defined below.  Class A, B and C roof assemblies and roof coverings required to be listed by this section shall be tested in accordance with ASTM E 108 or UL 790.  In addition, fire-retardant-treated wood roof coverings shall be tested in accordance with ASTM D2898.  The minimum roof coverings installed on buildings shall comply with Table 1505.1 based on the type of construction of the building.
		1505.1 General. Roof assemblies shall be divided into the classes defined below.  Class A, B and C roof assemblies and roof coverings required to be listed by this section shall be tested in accordance with ASTM E 108 or UL 790.  In addition, fire-retardant-treated wood roof coverings shall be tested in accordance with ASTM D2898.  The minimum roof coverings installed on buildings shall comply with Table 1505.1 based on the type of construction of the building.	
TABLE 1505.1a,b
MINIMUM ROOF COVERING CLASSIFICATION
FOR TYPES OF CONSTRUCTION
IA IB IIA IIB IIIA IIIB IV VA VB
B B B Cc B Cc B B Cc
For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m2.
a. Unless otherwise required in accordance with the International Urban
Wildland Interface Code or due to the location of the building within a fire district in accordance with Appendix D.
b. Nonclassified roof coverings shall be permitted on buildings of Group R-3, as applicable in Section 101.2, and Group U occupancies, where there is a minimum fire-separation distance of 6 feet measured from the leading edge of the roof.
c. Buildings that are not more than two stories in height and having not more than 6,000 square feet of projected roof area and where there is a minimum 10-foot fire-separation distance from the leading edge of the roof to a lot line on all sides of the building, except for street fronts or public ways, shall be permitted to have roofs of No. 1 cedar or redwood shakes and No. 1 shingles.

	TABLE 1505.1a,b
MINIMUM ROOF COVERING CLASSIFICATION
FOR TYPES OF CONSTRUCTION
IA IB IIA IIB IIIA IIIB IV VA VB
B B B Cc B Cc B B Cc
For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m2.
a. Unless otherwise required in accordance with the International Urban
Wildland Interface Code or due to the location of the building within a fire district in accordance with Appendix D.
b. Nonclassified roof coverings shall be permitted on buildings of Group R-3, as applicable in Section 101.2, and Group U occupancies, where there is a minimum fire-separation distance of 6 feet measured from the leading edge of the roof.
c. Buildings that are not more than two stories in height and having not more than 6,000 square feet of projected roof area and where there is a minimum 10-foot fire-separation distance from the leading edge of the roof to a lot line on all sides of the building, except for street fronts or public ways, shall be permitted to have roofs of No. 1 cedar or redwood shakes and No. 1 shingles.
	
1505.2 Class A roof assemblies. Class A roof assemblies are those that are effective against severe fire test exposure. Class A roof assemblies and roof coverings shall be listed and identified as Class A by an approved testing agency. Class A roof assemblies shall be permitted for use in buildings or structures of all types of construction.
Exception: Class A roof assemblies include those with coverings of brick, masonry, slate, clay or concrete roof tile, exposed concrete roof deck, ferrous or copper shingles or sheets.
	
	1505.2 Class A roof assemblies. Class A roof assemblies are those that are effective against severe fire test exposure. Class A roof assemblies and roof coverings shall be listed and identified as Class A by an approved testing agency. Class A roof assemblies shall be permitted for use in buildings or structures of all types of construction.
Exception: Class A roof assemblies include those with coverings of brick, masonry, slate, clay or concrete roof tile, exposed concrete roof deck, ferrous or copper shingles or sheets.
	
1505.3 Class B roof assemblies. Class B roof assemblies are those that are effective against moderate fire-test exposure.
Class B roof assemblies and roof coverings shall be listed and identified as Class B by an approved testing agency.
Exception: Class B roof assemblies include those with coverings of metal sheets and shingles.
		1505.3 Class B roof assemblies. Class B roof assemblies are those that are effective against moderate fire-test exposure.
Class B roof assemblies and roof coverings shall be listed and identified as Class B by an approved testing agency.
Exception: Class B roof assemblies include those with coverings of metal sheets and shingles.
	
1505.4 Class C roof assemblies. Class C roof assemblies are those that are effective against light fire-test exposure. Class C
roof assemblies and roof coverings shall be listed and identified as Class C by an approved testing agency.
		1505.4 Class C roof assemblies. Class C roof assemblies are those that are effective against light fire-test exposure. Class C
roof assemblies and roof coverings shall be listed and identified as Class C by an approved testing agency.
	
1505.5 Nonclassified roofing. Nonclassified roofing is approved material that is not listed as a Class A, B or C roof covering.
		1505.5 Nonclassified roofing. Nonclassified roofing is approved material that is not listed as a Class A, B or C roof covering.
	
1505.6 Fire-retardant-treated wood shingles and shakes.
Fire-retardant-treated wood shakes and shingles shall be treated by impregnation with chemicals by the full-cell vacuum-pressure process, in accordance with AWPA C1. Each bundle shall be marked to identify the manufactured unit and the manufacturer, and shall also be labeled to identify the classification of the material in accordance with the testing required in Section 1505.1, the treating company and the quality control agency.
		1505.6 Fire-retardant-treated wood shingles and shakes.
Fire-retardant-treated wood shakes and shingles shall be treated by impregnation with chemicals by the full-cell vacuum-pressure process, in accordance with AWPA C1. Each bundle shall be marked to identify the manufactured unit and the manufacturer, and shall also be labeled to identify the classification of the material in accordance with the testing required in Section 1505.1, the treating company and the quality control agency.
	
1505.7 Special purpose roofs. Special purpose wood shingle or wood shake roofing shall conform with the grading and application requirements of Section 1507.8 or 1507.9. In addition, an underlayment of 0.625-inch (15.9 mm) Type X water-resistant gypsum backing board or gypsum sheathing shall be placed under minimum nominal 0.5-inch-thick (12.7 mm) wood structural panel solid sheathing or 1-inch (25 mm) nominal spaced sheathing.		1505.7 Special purpose roofs. Special purpose wood shingle or wood shake roofing shall conform with the grading and application requirements of Section 1507.8 or 1507.9. In addition, an underlayment of 0.625-inch (15.9 mm) Type X water-resistant gypsum backing board or gypsum sheathing shall be placed under minimum nominal 0.5-inch-thick (12.7 mm) wood structural panel solid sheathing or 1-inch (25 mm) nominal spaced sheathing.	
SECTION 1506 
MATERIALS
		SECTION 1506 
MATERIALS
	
1506.1 Scope. The requirements set forth in this section shall apply to the application of roof-covering materials specified herein. Roof coverings shall be applied in accordance with this chapter and the manufacturer’s installation instructions. Installation of roof coverings shall comply with the applicable provisions of Section 1507.
		1506.1 Scope. The requirements set forth in this section shall apply to the application of roof-covering materials specified herein. Roof coverings shall be applied in accordance with this chapter and the manufacturer’s installation instructions. Installation of roof coverings shall comply with the applicable provisions of Section 1507.
	
1506.2 Compatibility of materials. Roofs and roof coverings shall be of materials that are compatible with each other and with the building or structure to which the materials are applied.
		1506.2 Compatibility of materials. Roofs and roof coverings shall be of materials that are compatible with each other and with the building or structure to which the materials are applied.
	
1506.3 Material specifications and physical characteristics.
Roof-covering materials shall conform to the applicable standards listed in this chapter. In the absence of applicable standards or where materials are of questionable suitability, testing by an approved agency shall be required by the building official to determine the character, quality and limitations of application of the materials.
	
	1506.3 Material specifications and physical characteristics.
Roof-covering materials shall conform to the applicable standards listed in this chapter. In the absence of applicable standards or where materials are of questionable suitability, testing by an approved agency shall be required by the building official to determine the character, quality and limitations of application of the materials.
	
1506.4 Product identification. Roof-covering materials shall be delivered in packages bearing the manufacturer’s identifying marks and approved testing agency labels required in accordance with Section 1505. Bulk shipments of materials shall be accompanied with the same information issued in the form of a certificate or on a bill of lading by the manufacturer.
		1506.4 Product identification. Roof-covering materials shall be delivered in packages bearing the manufacturer’s identifying marks and approved testing agency labels required in accordance with Section 1505. Bulk shipments of materials shall be accompanied with the same information issued in the form of a certificate or on a bill of lading by the manufacturer.
	
SECTION 1507
REQUIREMENTS FOR ROOF COVERINGS
		SECTION 1507
REQUIREMENTS FOR ROOF COVERINGS
	
1507.1 Scope. Roof coverings shall be applied in accordance with the applicable provisions of this section and the manufacturer’s installation instructions.

		1507.1 Scope. Roof coverings shall be applied in accordance with the applicable provisions of this section and the manufacturer’s installation instructions.
	
	Mod 598 (New section)
1507.3 Crickets or Saddles.  A crickets or saddles shall be installed on the ridge side of any chimney greater than 30 inches (762 mm) wide.  Cricket or saddle coverings shall be sheet metal or of the same material as the roof covering. 	Add as a new section.

1507.3 Crickets or Saddles.  A crickets or saddles shall be installed on the ridge side of any chimney greater than 30 inches (762 mm) wide.  Cricket or saddle coverings shall be sheet metal or of the same material as the roof covering.	
1507.2 Asphalt shingles. The installation of asphalt shingles shall comply with the provisions of this section and Table 1507.2.
		1507.2 Asphalt shingles. The installation of asphalt shingles shall comply with the provisions of this section and Table 1507.2.
	
1507.2.1 Deck requirements. Asphalt shingles shall be fastened to solidly sheathed decks. 

		1507.2.1 Deck requirements. Asphalt shingles shall be fastened to solidly sheathed decks. 
	
1507.2.2 Slope. Asphalt shingles shall only be used on roof slopes of two units vertical in 12 units horizontal (17-percent slope) or greater. For roof slopes from two units vertical in 12 units horizontal (17-percent slope) up to four units vertical in 12 units horizontal (33-percent slope), double underlayment application is required in accordance with Section 1507.2.8.
		1507.2.2 Slope. Asphalt shingles shall only be used on roof slopes of two units vertical in 12 units horizontal (17-percent slope) or greater. For roof slopes from two units vertical in 12 units horizontal (17-percent slope) up to four units vertical in 12 units horizontal (33-percent slope), double underlayment application is required in accordance with Section 1507.2.8.
	
1507.2.3 Underlayment. Unless otherwise noted, required underlayment shall conform to ASTM D 226, Type I, or ASTM D 4869, Type I.
	Mod 591

1507.3.3  Underlayment.  Unless otherwise noted, required underlayment shall conform with ASTM D 226, (Type I or Type II) or ASTM D 4869, (Type I or Type II).
	1507.2.3 Underlayment. Unless otherwise noted, required underlayment shall conform to ASTM D 226, Type I or Type II ASTM D 4869  Type I or Type II.
	
1507.2.4 Self-adhering polymer modified bitumen sheet.
Self-adhering polymer modified bitumen sheet shall comply with ASTM D 1970.
	We do not think this is correct.  Should eliminate the entire section - FRSA

1507.3.4 Self-adhering polymer modified bitumen sheet. Self-adhering polymer modified bitumen sheet shall comply with ASTM D 1970. (ASTM D 1970-95 Self Adhering Polymer Modified Bituminous Sheets used as Steep Roof Underlayment for Ice Dam Protection)
	1507.2.4 Self-adhering polymer modified bitumen sheet.
Self-adhering polymer modified bitumen sheet shall comply with ASTM D 1970.
	
1507.2.5 Asphalt shingles. Asphalt shingles shall have self-seal strips or be interlocking, and comply with ASTM D 225 or ASTM D 3462.
		1507.2.5 Asphalt shingles. Asphalt shingles shall have self-seal strips or be interlocking, and comply with ASTM D 225 or ASTM D 3462.
	
1507.2.6 Fasteners.  Fasteners for asphalt shingles shall be galvanized, stainless steel, aluminum or copper roofing nails, minimum 12 gage [0.105 inch (2.67 mm)] shank with a minimum 0.375 inch-diameter (9.5 mm) head, of a length to penetrate through the roofing materials and a minimum of 0.75 inch (19.1 mm) into the roof sheathing.  Where the roof sheathing is less than 0.75 inch (19.1 mm) thick, the nails shall penetrate through the sheathing.  Fasteners shall comply with ASTM F 1667.
	1506.5.1 Nails shall be corrosion resistant nails conforming to ASTM F 1667. The corrosion resistance shall meet ASTM A 641, Class 1 or an equal corrosion resistance by coating, electro galvanization, mechanical galvanization, hot dipped galvanization, stainless steel, nonferrous metal and alloys or other suitable corrosion resistant material.
Mod 749
1506.5.1.1 The nail component of plastic cap nails shall meet the corrosion resistance requirements of 1506.5.1.	1507.2.6 Fasteners.  Fasteners for asphalt shingles shall be galvanized, stainless steel, aluminum or copper roofing nails, minimum 12 gage [0.105 inch (2.67 mm)] shank with a minimum 0.375 inch-diameter (9.5 mm) head, of a length to penetrate through the roofing materials and a minimum of 0.75 inch (19.1 mm) into the roof sheathing.  Where the roof sheathing is less than 0.75 inch (19.1 mm) thick, the nails shall penetrate through the sheathing.  Fasteners shall comply with ASTM F 1667.
1507.2.6.1 The nail component of plastic cap nails shall meet the corrosion resistance requirements of 1507.2.6.	
1507.2.7 Attachment. Asphalt shingles shall have the minimum number of fasteners required by the manufacturer and
Section 1504.1. Asphalt shingles shall be secured to the roof with not less than four fasteners per strip shingle or two fasteners per individual shingle. Where the roof slope exceeds 20 units vertical in 12 units horizontal (166-percent slope), special methods of fastening are required. For roofs located where the basic wind speed in accordance with Figure 1609 is 110 mph or greater, special methods of fastening are required. Special fastening methods shall be tested in accordance with ASTM D 3161, modified to use a wind speed of 110 mph.
	§1507.3.7 Attachment. Asphalt shingles shall be secured to the roof with
not less than four fasteners per strip shingle or two fasteners per
individual shingle.  Where the roof slope exceeds 20 units vertical in 12
units horizontal (20:12), special methods of fastening are required.  For
roofs located where the basic wind speed per Figure 1606 is 110 mph (49
m/s) or greater, special methods of fastening are required.  Unless
otherwise noted, attachment of asphalt shingles shall conform with ASTM D
3161 (modified to 110 mph) or M-DC PA 107-95.

	1507.2.7 Attachment. Asphalt shingles shall have the minimum number of fasteners required by the manufacturer and
Section 1504.1. Asphalt shingles shall be secured to the roof with not less than four fasteners per strip shingle or two fasteners per individual shingle. Where the roof slope exceeds 20 units vertical in 12 units horizontal (166-percent slope), special methods of fastening are required. For roofs located where the basic wind speed in accordance with Figure 1609 is 110 mph or greater, special methods of fastening are required. Special fastening methods shall be tested in accordance with ASTM D 3161, modified to use a wind speed of 110 mph or M-DC PA 107-95.
.
	
1507.2.8 Underlayment application. For roof slopes from two units vertical in 12 units horizontal (17-percent slope), up to four units vertical in 12 units horizontal (33-percent slope), underlayment shall be two layers applied in the following manner. Apply a minimum 19-inch-wide (483 mm) strip of underlayment felt parallel with and starting at the eaves, fastened sufficiently to hold in place. Starting at the eave, apply 36-inch-wide (914 mm) sheets of underlayment overlapping successive sheets 19 inches (483 mm) and fastened sufficiently to hold in place. For roof slopes of four units vertical in 12 units horizontal (33-percent slope) or greater, underlayment shall be one layer applied in the following manner. Underlayment shall be applied shingle fashion, parallel to and starting from the eave and lapped 2 inches (51 mm), fastened only as necessary to hold in place.
	
	1507.2.8 Underlayment application. For roof slopes from two units vertical in 12 units horizontal (17-percent slope), up to four units vertical in 12 units horizontal (33-percent slope), underlayment shall be two layers applied in the following manner. Apply a minimum 19-inch-wide (483 mm) strip of underlayment felt parallel with and starting at the eaves, fastened sufficiently to hold in place. Starting at the eave, apply 36-inch-wide (914 mm) sheets of underlayment overlapping successive sheets 19 inches (483 mm) and fastened sufficiently to hold in place. For roof slopes of four units vertical in 12 units horizontal (33-percent slope) or greater, underlayment shall be one layer applied in the following manner. Underlayment shall be applied shingle fashion, parallel to and starting from the eave and lapped 2 inches (51 mm), fastened only as necessary to hold in place.	
1507.2.8.1 High wind attachment. Underlayment applied in areas subject to high winds (greater than 110 mph in accordance with Figure 1609) shall be applied with corrosion- resistant fasteners in accordance with the manufacturer’s instructions. Fasteners are to be applied along the overlap at a maximum spacing of 36 inches (914 mm) on center.
		1507.2.8.1 High wind attachment. Underlayment applied in areas subject to high winds (greater than 110 mph in accordance with Figure 1609) shall be applied with corrosion- resistant fasteners in accordance with the manufacturer’s instructions. Fasteners are to be applied along the overlap at a maximum spacing of 36 inches (914 mm) on center.
	
1507.2.8.2 Ice dam membrane. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, a membrane that consists of at least two layers of underlayment cemented together or of a self-adhering polymer modified bitumen sheet shall be used in lieu of normal underlayment and extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.
Exception: Detached accessory structures that contain no conditioned floor area.

1507.3.8.3 Ice shield. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice shield that consists of at least two layers of underlayment cemented together or of a self-adhering polymer modified bitumen sheet, shall be used in lieu of normal underlayment and extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.
	1507.2.8.2 Ice dam membrane. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, a membrane that consists of at least two layers of underlayment cemented together or of a self-adhering polymer modified bitumen sheet shall be used in lieu of normal underlayment and extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.
Exception: Detached accessory structures that contain no conditioned floor area.
	
1507.2.9 Flashings. Flashing for asphalt shingles shall comply with this section. Flashing shall be applied in accordance with this section and the asphalt shingle manufacturer’s printed instructions.
		1507.2.9 Flashings. Flashing for asphalt shingles shall comply with this section. Flashing shall be applied in accordance with this section and the asphalt shingle manufacturer’s printed instructions.
	
1507.2.9.1 Base and cap flashing. Base and cap flashing shall be installed in accordance with the manufacturer’s instructions.  Base flashing shall be of either corrosion-resistant metal of minimum nominal 0.019-inch (0.483 mm) thickness or mineral-surfaced roll roofing weighing a minimum of 77 pounds per 100 square feet (3.76 kg/m2). Cap flashing shall be corrosion-resistant metal of minimum nominal 0.019-inch (0.483 mm) thickness.
	Mod 680

1507.3.9 Flashings.  Flashing for asphalt shingles shall comply with 1507.3.9.
1507.3.9.1 Base and cap counter flashing.  
1507.3.9.1.1 Base and cap counter flashing shall be installed as follows:

a.		In accordance with manufacturer’s installation instructions, or
b.  A continuous metal “L” flashing shall be set in approved flashing cement and set flush to base of wall and over the underlayment.  Both horizontal and vertical metal flanges shall be fastened 6 inches on center with approved fasteners.  All laps shall be a minimum of 4 inches fully sealed in approved flashing cement.  Flashing shall start at the lower portion of roof to insure water-shedding capabilities of all metal laps.  The entire edge of the horizontal flange shall be sealed covering all nail penetrations with approved flashing cement and membrane.  Shingles will overlap the horizontal flange and shall be set in approved flashing cement.

1507.3.9.1.1		1507.3.9.1.2 Base flashing shall be of either corrosion resistant metal of minimum nominal 0.019 inch (0.483 mm) thickness with a minimum thickness provided in section 1507.3.9.2 or mineral surface roll roofing weighing a minimum of 77 lb per 100 sq ft (3.76 kg/m2).  Cap Counter flashing shall be corrosion resistant metal of minimum nominal 0.019 inch (0.483 mm) with a minimum thickness provided in Table 1507.3.9.2. 

Mod 592

1507.3.9.1  Base and cap counter flashing.  Base and cap counter flashing shall be installed in accordance with manufacturer’s installation instructions.  Base flashing shall be of either corrosion-resistant metal of minimum nominal 0.019 inch (0.483 mm) thickness with a minimum thickness provided in section 1507.3.9.2 or mineral surface roll roofing weighting a minimum of 77 lb per 100 sq ft (3.76 kg/m2).  Cap Counter flashing shall be corrosion resistant metal minimum nominal 0.019 inch (0.483 mm) thickness of minimum thickness provided in Table 1507.3.9.2.
	1507.2.9.1 Base and cap counter flashing. Base and cap counter flashing shall be installed as follows:

a.   In accordance with manufacturer’s installation instructions, or
a.		b.   A continuous metal “L” flashing shall be set in approved flashing cement and set flush to base of wall and over the underlayment.  Both horizontal and vertical metal flanges shall be fastened 6 inches on center with approved fasteners.  All laps shall be a minimum of 4 inches fully sealed in approved flashing cement.  Flashing shall start at the lower portion of roof to insure water-shedding capabilities of all metal laps.  The entire edge of the horizontal flange shall be sealed covering all nail penetrations with approved flashing cement and membrane.  Shingles will overlap the horizontal flange and shall be set in approved flashing cement.  
Base flashing shall be of either corrosion resistant metal of minimum nominal 0.019 inch (0.483 mm) thickness with a minimum thickness provided in section 1507.3.9.2 or mineral surface roll roofing weighing a minimum of 77 lb per 100 sq ft (3.76 kg/m2).  Cap Counter flashing shall be corrosion resistant metal of minimum nominal 0.019 inch (0.483 mm) with a minimum thickness provided in Table 1507.3.9.2.

	
1507.2.9.2 Valleys. Valley linings shall be installed in accordance with the manufacturer’s instructions before applying shingles. Valley linings of the following types shall be permitted:
1.		For open valleys (valley lining exposed) lined with metal, the valley lining shall be at least 16 inches (406 mm) wide and of any of the corrosion-resistant metals in Table 1507.2.9.2. 
2.		For open valleys, valley lining of two plies of mineral-surfaced roll roofing shall be permitted. The bottom layer shall be 18 inches (457 mm) and the top layer a minimum of 36 inches (914) mm) wide.
3.  For closed valleys (valleys covered with shingles), valley lining of one ply of smooth roll roofing complying with ASTM D 224 and at least 36 inches (914 mm) wide or types as described in Items 1 and 2 above shall be permitted Specialty underlayment shall comply with ASTM D 1970.
	
	1507.2.9.2 Valleys. Valley linings shall be installed in accordance with the manufacturer’s instructions before applying shingles. Valley linings of the following types shall be permitted:
1.		For open valleys (valley lining exposed) lined with metal, the valley lining shall be at least 16 inches (406 mm) wide and of any of the corrosion-resistant metals in Table 1507.2.9.2. 
2.		For open valleys, valley lining of two plies of mineral-surfaced roll roofing shall be permitted. The bottom layer shall be 18 inches (457 mm) and the top layer a minimum of 36 inches (914) mm) wide.
3.  For closed valleys (valleys covered with shingles), valley lining of one ply of smooth roll roofing complying with ASTM D 224 and at least 36 inches (914 mm) wide or types as described in Items 1 and 2 above shall be permitted. Specialty underlayment shall comply with ASTM D 1970.
	
TABLE 1507.2
ASPHALT SHINGLE APPLICATION
COMPONENT INSTALLATION REQUIREMENT
1. Roof slope

Asphalt shingles shall only be used on roof slopes of two units vertical in 12 units horizontal (2:12) or greater. For roof slopes from two units vertical in 12 units horizontal (2:12) up to four units vertical in 12 units horizontal (4:12), double underlayment application is required in accordance with Section 1507.2.8.

2. Deck requirement

Asphalt shingles shall be fastened to solidly sheathed roofs.

3. Underlayment

Underlayment shall conform with ASTM D 226, Type 1, or ASTM D 4869, Type 1.  For roof slopes from two units vertical in 12 units horizontal (2:12), up to four units vertical in 12 units horizontal (4:12) Underlayment shall be two layers applied in the following manner. Apply a minimum 19-inch strip or underlayment felt parallel to and starting at the eaves, fastened sufficiently to hold in place. Starting at the eave, apply 35-inch-wide sheets of underlayment overlapping successive sheets 19 inches and fastened sufficiently to hold in place.

For roof slopes from four units vertical in 12 units horizontal (4:12) or greater 
Underlayment shall be one layer applied in the following manner. Underlayment shall be applied shingle fashion, parallel to and starting from the eave and lapped 2 inches, fastened only as necessary to hold in place.

In areas where the average daily temperature in January is 25°F or less or where there is a possibility of ice forming along the eaves causing a backup of water

A membrane that consists of at least two layers of underlayment cemented together or of a self-adhering polymer-modified bitumen sheet shall be used in lieu of normal underlayment and extend from the eave’s edge to a point at least 24 inches inside the exterior wall line of the building.

4. Application
—

Attachment Asphalt shingles shall have the minimum number of fasteners required by the manufacturer and Section 1504.1. Asphalt shingles shall be secured to the roof with not less than four fasteners per strip shingle or two fasteners per individual shingle. Where the roof slope exceeds 20 units vertical in 12 units horizontal (20:12), special methods of fastening are required.

Fasteners

Galvanized, stainless steel, aluminum or copper roofing nails, minimum 12-gage (0.015 inch) shank with a minimum 3/8-inch diameter head. Fasteners shall be long enough to penetrate into the sheathing 3/4 inch or through the thickness of the sheathing.

Flashings

In accordance with Section 1507.2.9.
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, °C = [(°F) - 32]/1.8, 1 mile per hour = 1.609 km/h. 

	TABLE 1507.2 
ASPHALT SHINGLE APPLICATION
COMPONENT INSTALLATION REQUIREMENT
1. Roof slope

Asphalt shingles shall only be used on roof slopes of two units vertical in 12 units horizontal (2:12) or greater. For roof slopes from two units vertical in 12 units horizontal (2:12) up to four units vertical in 12 units horizontal (4:12), double underlayment application is required in accordance with Section 1507.2.8.

2. Deck requirement

Asphalt shingles shall be fastened to solidly sheathed roofs.

3. Underlayment

Underlayment shall conform with ASTM D 226, Type 1, or ASTM D 4869, Type 1.  For roof slopes from two units vertical in 12 units horizontal (2:12), up to four units vertical in 12 units horizontal (4:12) Underlayment shall be two layers applied in the following manner. Apply a minimum 19-inch strip or underlayment felt parallel to and starting at the eaves, fastened sufficiently to hold in place. Starting at the eave, apply 35-inch-wide sheets of underlayment overlapping successive sheets 19 inches and fastened sufficiently to hold in place.

For roof slopes from four units vertical in 12 units horizontal (4:12) or greater 
Underlayment shall be one layer applied in the following manner. Underlayment shall be applied shingle fashion, parallel to and starting from the eave and lapped 2 inches, fastened only as necessary to hold in place.

In areas where the average daily temperature in January is 25°F or less or where there is a possibility of ice forming along the eaves causing a backup of water

A membrane that consists of at least two layers of underlayment cemented together or of a self-adhering polymer-modified bitumen sheet shall be used in lieu of normal underlayment and extend from the eave’s edge to a point at least 24 inches inside the exterior wall line of the building.
4. Application
—

Attachment Asphalt shingles shall have the minimum number of fasteners required by the manufacturer and Section 1504.1. Asphalt shingles shall be secured to the roof with not less than four fasteners per strip shingle or two fasteners per individual shingle. Where the roof slope exceeds 20 units vertical in 12 units horizontal (20:12), special methods of fastening are required.

Fasteners

Galvanized, stainless steel, aluminum or copper roofing nails, minimum 12-gage (0.015 inch) shank with a minimum 3/8-inch diameter head. Fasteners shall be long enough to penetrate into the sheathing 3/4 inch or through the thickness of the sheathing.

Flashings

In accordance with Section 1507.2.9.

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, °C = [(°F) - 32]/1.8, 1 mile per hour = 1.609 km/h. 

	
TABLE 1507.2.9.2
VALLEY LINING MATERIAL
MATERIAL
MINIMUM
THICKNESS GAGE WEIGHT
Copper — — 16 oz
Aluminum 0.024 in. — —
Stainless steel — 28 —
Galvanized steel 0.0179 in. 26 (zinc-coated G90) —
Zinc alloy 0.027 in. — —
Lead — — 2.5 pounds
Painted terne — — 20 pounds
For SI: 1 inch = 25.4 mm, 1 pound = 0.454 kg, 1 ounce = 28.35 g.
		TABLE 1507.2.9.2
VALLEY LINING METAL FLASHING MATERIAL
MATERIAL
MINIMUM
THICKNESS (INCHES) GAGE WEIGHT (lbs per sq ft)
Copper — — 16 oz
Aluminum 0.024 in. — —
Stainless steel — 28 —
Galvanized steel 0.0179 in. 26 (zinc-coated G90) —
Aluminum Zinc Coated Steel  .0179   26
(AZ50 Alum Zinc)
Zinc alloy 0.027 in. — —
Lead — — 2.5 pounds
Painted terne — — 20 pounds  1.25 (20 oz)
For SI: 1 inch = 25.4 mm, 1 pound = 0.454 kg, 1 ounce = 28.35 g.

(This Section not needed.  Refer to Metal Flashing Material Table)
	
New Section
	Mod 681  (New Section)

1507.3.9.2.1		 Metal roofing accessories.  
All metal accessories for roofs shall not be less than 26 gage G-90 galvanized, stainless steel 28 gage, or AZ 50 aluminum zinc coated steel 26 gage.
	(This Section not needed.  Refer to Metal Flashing Material Table)

1507.2.9.3 Drip edge. Provide drip edge at eaves and gables of shingle roofs. Overlap to be a minimum of 2 inches (51 mm). Eave drip edges shall extend 0.25 inch (6.4 mm) below sheathing and extend back on the roof a minimum of 2 inches (51 mm). Drip edge shall be mechanically fastened a maximum of 12 inches (305 mm) o.c. A cricket or saddle shall be installed on the ridge side of any chimney greater than 30 inches (762 mm) wide. Cricket or saddle coverings shall be sheet metal or of the same material as the roof covering.
	Mod 596

1507.3.9.3 Drip edge.  Drip edge shall be provided at eaves and gables of shingle roofs, and overlapped a minimum of 2 inches (51 mm).  Eave drip edges shall extend ¼ inch (6.4 mm) below sheathing and extend back on the roof a minimum of 2 inches (51 mm). Drip edge shall be mechanically fastened a maximum of 12 inches (305 mm) on center.  Drip edge at eaves shall be permitted to be installed either over or under the underlayment.  If installed over the underlayment, there shall be a minimum 2 inch width of roof cement installed over the drip edge flange.

	1507.2.9.3 Drip edge. Provide drip edge at eaves and gables of shingle roofs. Overlap to be a minimum of 2 inches (51 mm). Eave drip edges shall extend 0.25 inch (6.4 mm) below sheathing and extend back on the roof a minimum of 2 inches (51 mm). Drip edge shall be mechanically fastened a maximum of 12 inches (305 mm) o.c.  Drip edge at eaves shall be permitted to be installed either over or under the underlayment.  If installed over the underlayment, there shall be a minimum 2 inch width of roof cement installed over the drip edge flange.
A cricket or saddle shall be installed on the ridge side of any chimney greater than 30 inches (762 mm) wide. Cricket or saddle coverings shall be sheet metal or of the same material as the roof covering.

(Crickets and Saddles moved to New Section Crickets or Saddles)
	
	Mod 598 (New section)

1507.3 Crickets or Saddles.  A crickets or saddles shall be installed on the ridge side of any chimney greater than 30 inches (762 mm) wide.  Cricket or saddle coverings shall be sheet metal or of the same material as the roof covering.	
(New Section)

1507.3 Crickets or Saddles.  A crickets or saddles shall be installed on the ridge side of any chimney greater than 30 inches (762 mm) wide.  Cricket or saddle coverings shall be sheet metal or of the same material as the roof covering.	
1507.3 Clay and concrete tile. The installation of clay and concrete tile shall comply with the provisions of this section.
		1507.3 Clay and concrete tile. The installation of clay and concrete tile shall comply with the provisions of this section.
	
1507.3.1 Deck requirements. Concrete and clay tile shall be installed only over solid sheathing or spaced structural sheathing boards.
	Mod 423

Deck requirements.  Concrete and clay tile shall be installed only over solid sheathing or except where the roof covering is specifically designed and tested in accordance with 1606.3.2 to be applied over structural spaced sheathing boards.
	1507.3.1 Deck requirements. Concrete and clay tile shall be installed only over solid sheathing or spaced structural sheathing boards.  except where the roof covering is specifically designed and tested in accordance with 1606.3.2 to be applied over structural spaced sheathing boards.
[Revised 1/13/04]	
1507.3.2 Deck slope. Clay and concrete roof tile shall be installed on roof slopes of 21/2 units vertical in 12 units horizontal
(21-percent slope) or greater. For roof slopes from 21/2 units vertical in 12 units horizontal (21-percent slope) to four units vertical in 12 units horizontal (33-percent slope), double underlayment application is required in accordance with Section 1507.3.3.
	Mod 599

1507.4.2.2		Deck slope.  Clay and concrete roof tile shall be installed on roof slopes of 

2 ½:12 or greater.  For roofs sloped from 2 ½:12 to 4:12 double underlayment application is required in accordance with 1507.4.3. in accordance with the recommendations of FRSA/RTI 07320.

	1507.3.2 Deck slope. Clay and concrete roof tile shall be installed on roof slopes of 21/2 units vertical in 12 units horizontal
(21-percent slope) or greater. For roof slopes from 21/2 units vertical in 12 units horizontal (21-percent slope) to four units vertical in 12 units horizontal (33-percent slope), double underlayment application is required in accordance with Section 1507.3.3.  in accordance with the recommendations of FRSA/RTI 07320.
	
1507.3.3 Underlayment. Unless otherwise noted, required underlayment shall conform to: ASTM D 226, Type II;
ASTM D 2626 or ASTM D 249 Type I mineral-surfaced roll roofing.
	Mod 600

1507.4.3 Underlayment.  Unless otherwise noted, required underlayment shall conform with ASTM D 226, Type II; ASTM D 2626;Type I ASTM D 1970; or ASTM D 249 6380 mineral surfaced roll roofing.
	1507.3.3 Underlayment. Unless otherwise noted, required underlayment shall conform to: ASTM D 226, Type II;
ASTM D 2626; ASTM D 1970 or ASTM D 249 Type I  6380 mineral-surfaced roll roofing.
	
1507.3.3.1 Low-slope roofs. For roof slopes from 21/2 units vertical in 12 units horizontal (21-percent slope), up to four units vertical in 12 units horizontal (33-percent slope), underlayment shall be a minimum of two layers applied as follows:
1.		Starting at the eave, a 19-inch (483 mm) strip of underlayment shall be applied parallel with the eave and fastened sufficiently in place.
2.		Starting at the eave, 36-inch-wide (914 mm) strips of underlayment felt shall be applied overlapping successive sheets 19 inches (483 mm) and fastened sufficiently in place.
	
	1507.3.3.1 Low-slope roofs. For roof slopes from 21/2 units vertical in 12 units horizontal (21-percent slope), up to four units vertical in 12 units horizontal (33-percent slope), underlayment shall be a minimum of two layers applied as follows:
1.  Starting at the eave, a 19-inch (483 mm) strip of underlayment shall be applied parallel with the eave and fastened sufficiently in place.
2.   Starting at the eave, 36-inch-wide (914 mm) strips of underlayment felt shall be applied overlapping successive sheets 19 inches (483 mm) and fastened sufficiently in place.
	
1507.3.3.2 High-slope roofs. For roof slopes of four units vertical in 12 units horizontal (33-percent slope) or greater, underlayment shall be a minimum of one layer of underlayment felt applied shingle fashion, parallel to, and starting from the eaves and lapped 2 inches (51 mm), fastened only as necessary to hold in place.
		1507.3.3.2 High-slope roofs. For roof slopes of four units vertical in 12 units horizontal (33-percent slope) or greater, underlayment shall be a minimum of one layer of underlayment felt applied shingle fashion, parallel to, and starting from the eaves and lapped 2 inches (51 mm), fastened only as necessary to hold in place.	
1507.3.4 Clay tile. Clay roof tile shall comply with ASTM C 1167.
		1507.3.4 Clay tile. Clay roof tile shall comply with ASTM C 1167.	
1507.3.5 Concrete tile. Concrete roof tiles shall be in accordance with the physical test requirements as follows:
1. The transverse strength of tiles shall be determined according to Section 6.3 of ASTM C 1167 and in accordance with Table 1507.3.5.
2. The absorption of concrete roof tiles shall be according to Section 8 of ASTM C 140. Roof tiles shall absorb not more than 15 percent of the dry weight of the tile during a 24-hour immersion test. 
3. Roof tiles shall be tested for freeze/thaw resistance according to Section 8 of ASTM C67. Roof tiles shall show no breakage and not have more than 1 percent loss in dry weight of any individual concrete roof tile.

	Mod 682

1507.4.5.2		Concrete Tile.  
1507.4.5.2.1
Roof tile shall be in accordance with the physical test requirements as follows:
1.		The transverse breaking strength of tiles shall be determined according to Section 5.3 of ASTM C 1167 and in accordance with Table 1507.4.5.2.1
2.		The absorption of concrete roof tiles shall be according to Section 8 of ASTM C 140.  Roof tiles shall absorb not more that 12% of the dry weight of the tile during a 24-hour immersion test.
3.		Roof tiles shall be tested for freeze/thaw resistance according to Section 8 of ASTM C 67.  Roof tiles shall show no breakage and not have more that 1% loss in dry weight of any individual concrete roof tile.
	1507.3.5 Concrete tile. Concrete roof tiles shall comply with ASTM C 1492.   be in accordance with the physical test requirements as follows:
1.  The transverse strength of tiles shall be determined according to Section 6.3 of ASTM C 1167 and in accordance with Table 1507.3.5.
2.  The absorption of concrete roof tiles shall be according to Section 8 of ASTM C 140. Roof tiles shall absorb not more than 15 percent of the dry weight of the tile during a 24-hour immersion test. 
3.  Roof tiles shall be tested for freeze/thaw resistance according to Section 8 of ASTM C67. Roof tiles shall show no breakage and not have more than 1 percent loss in dry weight of any individual concrete roof tile.

TABLE 1507.3.5
TRANSVERSE BREAKING STRENGTH
OF CONCRETE ROOF TILE (lbs.)
TILE PROFILE
DRY
Average of five tiles Individual tile
High profile 400 350
Medium profile 300 250
Flat profile 300 250
For SI: 1 pound = 4.45 N.
	Mod 692

1507.4.5.2.1		1507.4.5.2.1 Transverse Breaking Strength of Concrete Roof Tile

Delete the entire table, the information is out of date.
	TABLE 1507.3.5
TRANSVERSE BREAKING STRENGTH
OF CONCRETE ROOF TILE (lbs.)
TILE PROFILE
DRY
Average of five tiles Individual tile
High profile 400 350
Medium profile 300 250
Flat profile 300 250
For SI: 1 pound = 4.45 N.
	
1507.3.6 Fasteners. Tile fasteners shall be corrosion resistant and not less than 11 gage, 5/16-inch (8.0 mm) head, and of sufficient length to penetrate the deck a minimum of 0.75 inch (19.1 mm) or through the thickness of the deck, whichever is less. Attaching wire for clay or concrete tile shall not be smaller than 0.083 inch (2.1 mm). Perimeter fastening areas include three tile courses but not less than 36 inches (914 mm) from either side of hips or ridges and edges of eaves and gable rakes.
	
	1507.3.6 Fasteners. Tile fasteners shall be corrosion resistant and not less than 11 gage, 5/16-inch (8.0 mm) head, and of sufficient length to penetrate the deck a minimum of 0.75 inch (19.1 mm) or through the thickness of the deck, whichever is less. Attaching wire for clay or concrete tile shall not be smaller than 0.083 inch (2.1 mm). Perimeter fastening areas include three tile courses but not less than 36 inches (914 mm) from either side of hips or ridges and edges of eaves and gable rakes.
	
1507.3.7 Attachment. Clay and concrete roof tiles shall be fastened in accordance with Table 1507.3.7.	Mod 682, 602   Note:  Check Section 1606

1507.4.7 Attachment. Clay and concrete roof tiles shall be fastened in accordance with 1507.4 and section 1606 Table 1507.4.7 or in accordance with FRSA/RTI Installation Manual.

Delete Table 1507.4.7
	1507.3.7 Attachment. Clay and concrete roof tiles shall be fastened in accordance with section 1606 or in accordance with FRSA/RTI Installation Manual.
Table 1507.3.7.	
TABLE 1507.3.7
CLAY AND CONCRETE TILE ATTACHMENT a, b, c
GENERAL — CLAY OR CONCRETE ROOF TILE
Maximum basic
wind speed 
(mph)
Mean roof
height
(feet)
Roof slope up to < 3:12
Roof slope 3:12 and over
85 0-60 One fastener per tile. Flat tile without vertical laps, two fasteners per tile.
Two fasteners per tile. Only one fastener on slopes of 7:12 and less for tiles with installed weight exceeding 7.5 lbs./sq. ft.
having a width no greater than 16 inches. 100 0-40
100 > 40-60
The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips. All rake tiles shall be nailed with two nails. The nose of all ridge, hip and rake tiles shall be set in a bead of roofer’s mastic.
110 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
120 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
130 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
All > 60 The fastening system shall resist the wind forces in Section 1609.7.2.
INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGSd, e
(Installations on spaced/solid sheathing with battens or spaced sheathing)
Maximum basic
wind speed
(mph)
Mean roof
height
(feet) Roof slope up to < 5:12 Roof slope 5:12 < 12:12 Roof slope 12:12 and over
85 0-60 Fasteners are not required. Tiles with installed weight less than 9 lbs./sq. ft. require a minimum of one fastener per tile.
One fastener per tile every other row. All perimeter tiles require one fastener. Tiles with installed weight less than 9 lbs./sq. ft. require a minimum of one fastener per tile.
One fastener required for every tile. Tiles with installed weight less than 9 lbs./sq. ft. require a minimum of one fastener per
tile.
100 0-40
100 > 40-60
The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips. All rake tiles shall be nailed with two nails The nose of all ridge, hip and rake tiles shall be set in a bead of roofers’s mastic.
110 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
120 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
130 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
All > 60 The fastening system shall resist the wind forces in Section 1609.7.2.
INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGS
(Installations on solid sheathing without battens)
Maximum basic
wind speed
(mph)
Mean roof
height
(feet) All roof slopes
85 0-60 One fastener per tile.
100 0-40 One fastener per tile.
100 > 40-60
The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips.  All rake tiles shall be nailed with two nails The nose of all ridge, hip and rake tiles shall be set in a bead of roofers’ mastic.
110 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
120 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
130 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
All > 60 The fastening system shall resist the wind forces in Section 1609.7.2.
a.  Minimum fastener size. Corrosion-resistant nails not less than No. 11 gage with 5/16-inch head. Fasteners shall be long enough to penetrate into the sheathing 0.75 inch or through the thickness of the sheathing, whichever is less. Attaching wire for clay and concrete tile shall not be smaller than 0.083 inch.
b.  Snow areas. A minimum of two fasteners per tile are required or battens and one fastener.
c.  Roof slopes greater than 24:12. The nose of all tiles shall be securely fastened.
d.  Horizontal battens. Battens shall be not less than 1inch by 2 inch nominal. Provisions shall be made for drainage by a minimum of 1/8-inch riser at each nail or by 4-foot-long battens with at least a 0.5-inch separation between battens. Horizontal battens are required for slopes over 7:12.
e.  Perimeter fastening areas include three tile courses but not less than 36 inches from either side of hips or ridges and edges of eaves and gable rakes.

	TABLE 1507.3.7
CLAY AND CONCRETE TILE ATTACHMENT a, b, c
GENERAL — CLAY OR CONCRETE ROOF TILE
Maximum basic
wind speed
(mph)
Mean roof
height
(feet)
Roof slope up to < 3:12
Roof slope 3:12 and over
85 0-60 One fastener per tile. Flat tile without vertical laps, two fasteners per tile.
Two fasteners per tile. Only one fastener on slopes of 7:12 and less for tiles with installed weight exceeding 7.5 lbs./sq. ft. having a width no greater than 16 inches. 100 0-40
100 > 40-60
The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips. All rake tiles shall be nailed with two nails. The nose of all ridge, hip and rake tiles shall be set in a bead of roofer’s mastic.
110 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
120 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
130 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
All > 60 The fastening system shall resist the wind forces in Section 1609.7.2.
INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGSd, e
(Installations on spaced/solid sheathing with battens or spaced sheathing)
Maximum basic
wind speed
(mph)
Mean roof
height
(feet) Roof slope up to < 5:12 Roof slope 5:12 < 12:12 Roof slope 12:12 and over
85 0-60 Fasteners are not required. Tiles with installed weight less than 9 lbs./sq. ft. require a minimum of one fastener per tile.
One fastener per tile every other row. All perimeter tiles require one fastener. Tiles with installed weight less than 9 lbs./sq. ft. require a minimum of one fastener per tile.
One fastener required for every tile. Tiles with installed weight less than 9 lbs./sq. ft. require a minimum of one fastener per
tile.
100 0-40
100 > 40-60
The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips. All rake tiles shall be nailed with two nails The nose of all ridge, hip and rake tiles shall be set in a bead of roofers’s mastic.
110 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
120 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
130 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
All > 60 The fastening system shall resist the wind forces in Section 1609.7.2.
INTERLOCKING CLAY OR CONCRETE ROOF TILE WITH PROJECTING ANCHOR LUGS
(Installations on solid sheathing without battens)
Maximum basic
wind speed
(mph)
Mean roof
height
(feet) All roof slopes
85 0-60 One fastener per tile.
100 0-40 One fastener per tile.
100 > 40-60
The head of all tiles shall be nailed. The nose of all eave tiles shall be fastened with approved clips.  All rake tiles shall be nailed with two nails The nose of all ridge, hip and rake tiles shall be set in a bead of roofers’ mastic.
110 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
120 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
130 0-60 The fastening system shall resist the wind forces in Section 1609.7.2.
All > 60 The fastening system shall resist the wind forces in Section 1609.7.2.
a.  Minimum fastener size. Corrosion-resistant nails not less than No. 11 gage with 5/16-inch head. Fasteners shall be long enough to penetrate into the sheathing 0.75 inch or through the thickness of the sheathing, whichever is less. Attaching wire for clay and concrete tile shall not be smaller than 0.083 inch.
b.  Snow areas. A minimum of two fasteners per tile are required or battens and one fastener.
c.  Roof slopes greater than 24:12. The nose of all tiles shall be securely fastened.
d.  Horizontal battens. Battens shall be not less than 1inch by 2 inch nominal. Provisions shall be made for drainage by a minimum of 1/8-inch riser at each nail or by 4-foot-long battens with at least a 0.5-inch separation between battens. Horizontal battens are required for slopes over 7:12.
e.  Perimeter fastening areas include three tile courses but not less than 36 inches from either side of hips or ridges and edges of eaves and gable rakes.
	
1507.3.8 Application. Tile shall be applied according to the manufacturer’s installation instructions, based on the following:
1. Climatic conditions.
2. Roof slope.
3. Underlayment system.
4. Type of tile being installed.
	Mod 101

1507.4.4 Application Standards.  Clay and concrete tile shall be applied in accordance with the manufacturer’s installation instructions or recommendations of the FRSA/NTRMA 07320
FRSA/RTI 07320.
	1507.3.8 Application. Tile shall be applied according to the manufacturer’s installation instructions or recommendations of the FRSA/RTI 07320, based on the following:
1. Climatic conditions.
2. Roof slope.
3. Underlayment system.
4. Type of tile being installed.
	
1507.3.9 Flashing. At the juncture of the roof vertical surfaces, flashing and counterflashing shall be provided in accordance with the manufacturer’s installation instructions, and where of metal, shall not be less than 0.019-inch (0.48 mm) (No. 26 galvanized sheet gage) corrosion-resistant. The valley flashing shall extend at least 11 inches (279 mm) from the centerline each way and have a splash diverter rib not less than 1 inch (25 mm) high at the flow line formed as part of the flashing. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). For roof slopes of three units vertical in 12 units horizontal (25-percent slope) and over, the valley flashing shall have a 36-inch-wide (914 mm) underlayment of one layer of Type I underlayment running the full length of the valley, in addition to other required underlayment. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, the metal valley flashing underlayment shall be solid cemented to the roofing underlayment for slopes under seven units vertical in 12 units horizontal (58-percent slope) or of self-adhering polymer modified bitumen sheet.
	Mod 195

1507.4.9 Flashing. At the juncture of the roof and vertical surfaces, flashing and counterflashing shall be provided in accordance with the manufacturer’s installation instructions, and where of metal, shall not be less than 0.019 inch (0.48 mm) (26 gage galvanized sheet) corrosion-resistant metal. The valley flashing shall extend at least 11 inches (280 mm) from the center line each way and have a splash diverter rib not less than 1 inch (25.4 mm) high at the flow line formed as part of the flashing. Sections of flashing
shall have an end lap of not less than 4 inches (102 mm). For roof slopes of 3:12 and over, the valley flashing shall have one layer of 36-inch-wide (914 mm) Type I underlayment running the full length of the valley, in addition to other required underlayment. For slopes under 7:12, in areas where the average daily temperature in January is 25 °F. (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, the metal valley flashing underlayment shall be solid cemented to the roofing underlayment.

Mod 605
1507.4.9  Flashing.  At the juncture of the roof and vertical surfaces, flashing and counterflashing shall be provided in accordance with the manufacturer’s installation instructions or the recommendations of the FRSA/RTI 07320 Manual. , and where of metal, shall no be less that 0.019 inch (0.48 mm) (26 gage galvanized sheet) corrosion-resistant metal.  The valley flashing shall extend at least 11 inches (280 mm) from the center line each way and have a splash diverter rib not less that 1 inch (25.4 mm) high at the flow line formed as part of the flashing.  Sections of flashing shall have an end lap of not less than 4 inches (102 mm).  For roof slopes of 3:12 and over, the valley flashing shall have one layer of 36-inch-wide (914 mm) Type I underlayment running the full length of the valley, in addition to other required underlayment.  For slopes under 7:12, in areas where the average daily temperature in January is 25 degrees F.  (-4 degrees C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, the metal valley flashing underlayment shall be solid cemented to the roofing underlayment.
	1507.3.9 Flashing. At the juncture of the roof vertical surfaces, flashing and counterflashing shall be provided in accordance with the manufacturer’s installation instructions  or the recommendations of the FRSA/RTI 07320 Manual.  and where of metal, shall not be less than 0.019-inch (0.48 mm) (No. 26 galvanized sheet gage) corrosion-resistant. The valley flashing shall extend at least 11 inches (279 mm) from the centerline each way and have a splash diverter rib not less than 1 inch (25 mm) high at the flow line formed as part of the flashing. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). For roof slopes of three units vertical in 12 units horizontal (25-percent slope) and over, the valley flashing shall have a 36-inch-wide (914 mm) underlayment of one layer of Type I underlayment running the full length of the valley, in addition to other required underlayment. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, the metal valley flashing underlayment shall be solid cemented to the roofing underlayment for slopes under seven units vertical in 12 units horizontal (58-percent slope) or of self-adhering polymer modified bitumen sheet.
	
1507.4 Metal roof panels. The installation of metal roof panels shall comply with the provisions of this section.
	
	1507.4 Metal roof panels. The installation of metal roof panels shall comply with the provisions of this section.
	
1507.4.1 Deck requirements. Metal roof panel roof coverings shall be applied to a solid or closely fitted deck, except where the roof covering is specifically designed to be applied to spaced supports.
		1507.4.1 Deck requirements. Metal roof panel roof coverings shall be applied to a solid or closely fitted deck, except where the roof covering is specifically designed to be applied to spaced supports.
	
1507.4.2 Deck slope. The minimum slope for lapped, nonsoldered seam metal roofs without applied lap sealant shall be three units vertical in 12 units horizontal
(25-percent slope). The minimum slope for lapped, nonsoldered seam metal roofs with applied lap sealant shall be one-half vertical unit in 12 units horizontal
(4-percent slope). The minimum slope for standing seam of roof systems shall be one-quarter unit vertical in 12 units horizontal (2-percent slope).
	Mod 607    (Insert a new Section)

1507.5.2.1 Underlayment shall be installed as per manufacturer’s installation guidelines.
	1507.4.2 Deck slope. The minimum slope for lapped, nonsoldered seam metal roofs without applied lap sealant shall be three units vertical in 12 units horizontal
(25-percent slope). The minimum slope for lapped, nonsoldered seam metal roofs with applied lap sealant shall be one-half vertical unit in 12 units horizontal
(4-percent slope). The minimum slope for standing seam of roof systems shall be one-quarter unit vertical in 12 units horizontal (2-percent slope).

(New Section here)

Underlayment shall be installed as per manufacturer’s installation guidelines.
	
1507.4.3 Material standards. Metal-sheet roof covering systems that incorporate supporting structural members shall be designed in accordance with Chapter 22.
Metal-sheet roof coverings installed over structural decking shall comply with Table 1507.4.3.
	
	1507.4.3 Material standards. Metal-sheet roof covering systems that incorporate supporting structural members shall be designed in accordance with Chapter 22.
Metal-sheet roof coverings installed over structural decking shall comply with Table 1507.4.3.
	
1507.4.4 Attachment. Metal roofing fastened directly to steel framing shall be attached by approved manufacturers’ fasteners. In the absence of manufacturer recommendations, all of the following fasteners shall be used:
1.  Galvanized fasteners shall be used for galvanized roofs.
2.  300 series stainless-steel fasteners shall be used for copper roofs.
3.  Stainless-steel fasteners are acceptable for all types of metal roofs.
	Mod 684, 622

1507.5.4 Attachment.  Metal roofing shall be secured in accordance with manufacturer’s installation instruction.  In the absence of manufacturer’s recommendations, the following fasteners shall be used:
1.		Galvanized fasteners shall be used for galvanized roofs.
2.		Hard copper or copper alloy shall be used for copper roofs.
3.		Aluminum-zinc coated fasteners are acceptable for aluminum-zinc coated roofs.
4.		Stainless steel fasteners are acceptable for all metal roofs.

Mod 622

1508.4.4 Attachment.  Metal roofing shall be secured in accordance with manufacturer’s installation instruction.  In the absence of manufacturer’s recommendations, the following fasteners shall be used:
1.  Galvanized fasteners shall be used for galvanized roofs.
2.  Hard copper or copper alloy shall be used for copper roofs.
3.  Aluminum-zinc coated steel fasteners are acceptable for aluminum-zinc steel coated roofs.
4. Stainless steel fasteners are acceptable for all metal roofs.

	1507.4.4 Attachment. Metal roofing fastened directly to steel framing shall be attached by approved manufacturers’ fasteners. In the absence of manufacturer recommendations, all of the following fasteners shall be used:
1.  Galvanized fasteners shall be used for galvanized roofs.
2.  300 series stainless-steel fasteners shall be used for copper roofs.
3.  Aluminum-zinc coated fasteners are acceptable for aluminum-zinc coated roofs.
3.  4. Stainless-steel fasteners are acceptable for all types of metal roofs.

TABLE 1507.4.3
METAL ROOF COVERINGS
ROOF COVERING TYPE
STANDARD APPLICATION
RATE/THICKNESS
Aluminum
ASTM B 209, 0.024 inch minimum
thickness for roll-formed panels and 0.019
inch minimum thickness for press-formed
shingles.
Aluminum-zinc alloy
coated steel ASTM A 792 AZ 50
Copper
16 oz./sq. ft. for metal-sheet roof-covering
systems; 12 oz./sq. ft. for preformed metal
shingle systems.
Galvanized steel ASTM A 653 G-90 zinc-coated,
0.013-inch-thick minimum
Lead-coated copper ASTM B 101
Hard lead 2 lbs./sq. ft.
Soft lead 3 lbs./sq. ft.
Prepainted steel ASTM A 755
Terne (tin) and ternecoated
stainless
Terne coating of 40 lbs. per double base
box, field painted where applicable in
accordance with manufacturer’s
installation instructions.
For SI: 1 ounce per square foot = 0.0026 kg/m2,
1 pound per square foot = 4.882 kg/m2,
1 inch = 25.4 mm, 1 pound = 0.454 kg.
	Mod 641
TABLE 1507.5.3
METAL ROOF COVERINGS

ROOF COVERING TYPE	
MINIMUM APPLICATION RATE

Galvanized steel			ASTM A 653 G-90 zinc coated
Prepainted steel			ASTM A 755
Aluminum-zinc alloy coated steel	ASTM A 792 (AZ 50 coated minimum application rate.) 
Lead-coated copper			ASTM B 101
Copper					16 oz per sq ft (4.9 kg/m2)
Hard lead				2 lb per sq ft (9.8 kg/m2)
Soft lead				8 lb per sq ft (14.6 kg/m2)
Aluminum				ASTM B 209
Terne (tin) and terne coated stainless	Terne Coating of 40 lb (18 kg) per double base box, field painted where applicable in accordance with manufacturer’s installation instructions.

Mod 621

Aluminum-zinc alloy coated steel  ASTM A 792  (AZ 50 coated)	TABLE 1507.4.3
METAL ROOF COVERINGS
ROOF COVERING TYPE
STANDARD APPLICATION
RATE/THICKNESS
Aluminum
ASTM B 209, 0.024 inch minimum
thickness for roll-formed panels and 0.019
inch minimum thickness for press-formed
shingles.
Aluminum-zinc alloy
coated steel ASTM A 792 AZ 50 coated minimum application rate.) 
Copper
16 oz./sq. ft. for metal-sheet roof-covering
systems; 12 oz./sq. ft. for preformed metal
shingle systems.
Galvanized steel ASTM A 653 G-90 zinc-coated,
0.013-inch-thick minimum
Lead-coated copper ASTM B 101
Hard lead 2 lbs./sq. ft.
Soft lead 3 lbs./sq. ft.
Prepainted steel ASTM A 755
Terne (tin) and ternecoated
stainless
Terne coating of 40 lbs. per double base
box, field painted where applicable in
accordance with manufacturer’s
installation instructions.
For SI: 1 ounce per square foot = 0.0026 kg/m2,
1 pound per square foot = 4.882 kg/m2,
1 inch = 25.4 mm, 1 pound = 0.454 kg.
	
1507.5 Metal roof shingles. The installation of metal roof shingles shall comply with the provisions of this section.
		1507.5 Metal roof shingles. The installation of metal roof shingles shall comply with the provisions of this section.
	
1507.5.1 Deck requirements. Metal roof shingles shall be applied to a solid or closely fitted deck, except where the roof covering is specifically designed to be applied to spaced sheathing.
	
	1507.5.1 Deck requirements. Metal roof shingles shall be applied to a solid or closely fitted deck, except where the roof covering is specifically designed to be applied to spaced sheathing.
	
1507.5.2 Deck slope. Metal roof shingles shall not be installed on roof slopes below three units vertical in 12 units horizontal (25-percent slope).
		1507.5.2 Deck slope. Metal roof shingles shall not be installed on roof slopes below three units vertical in 12 units horizontal (25-percent slope).
	
1507.5.3 Underlayment. Underlayment shall conform to ASTM D 226, Type I. In areas where the average daily temperature
in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice barrier that consists of at least two layers of underlayment cemented together or of a self-adhering polymer-modified bitumen sheet, shall be used in lieu of normal
underlayment and extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.

Exception: Detached accessory structures that contain no conditioned floor area.
	Mod 195

1507.6.3 Underlayment. Underlayment shall conform with ASTM D 226, Type I. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice shield that consists of at least two layers of underlayment cemented together or of a self-adhering polymer modified bitumen sheet, shall be used in lieu of normal underlayment and extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.

Mod 610

1507.6.3 Underlayment.  Underlayment shall conform with ASTM D 226, Type I or Type II or ASTM D 1970.  In areas where the average daily temperature in January is 25 degrees F (-4 degrees C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice shield that consists of at least two layers of underlayment cemented together or of a self-adhering polymer modified bitumen sheet, shall be used in lieu of normal underlayment and extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall of the building.
	1507.5.3 Underlayment. Underlayment shall conform to ASTM D 226, Type I  or Type II or ASTM D 1970  In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice barrier that consists of at least two layers of underlayment cemented together or of a self-adhering polymer-modified bitumen sheet, shall be used in lieu of normal
underlayment and extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.

Exception: Detached accessory structures that contain no conditioned floor area.

(Note:  ASTM D 1970 should be ASTM D 1970-95)
	
1507.5.4 Material standards. Metal roof shingle roof coverings shall comply with Table 1507.4.3.
		1507.5.4 Material standards. Metal roof shingle roof coverings shall comply with Table 1507.4.3.
	
1507.5.5 Attachment. Metal roof shingles shall be secured to the roof in accordance with the approved manufacturer’s installation instructions.
		1507.5.5 Attachment. Metal roof shingles shall be secured to the roof in accordance with the approved manufacturer’s installation instructions.

1507.5.6 Flashing. Roof valley flashing shall be of corrosion-resistant metal of the same material as the roof covering or shall comply with the standards in Table 1507.4.3. The valley flashing shall extend at least 8 inches (203 mm) from the centerline each way and shall have a splash diverter rib not less than 0.75 inch (19.1 mm) high at the flow line formed as part of the flashing. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, the metal valley flashing shall have a 36-inch-wide (914 mm) underlayment directly under it consisting of one layer of underlayment running the full length of the valley, in addition to underlayment required for metal roof shingles. The metal valley flashing underlayment shall be solid cemented to the roofing underlayment for roof slopes under seven units vertical in 12 units horizontal (58-percent slope) or of self-adhering polymer-modified bitumen sheet.
	Mod 195

1507.6.6 Flashing. Roof valley flashing shall be provided of corrosion-resistant metal of the same material as the roof covering or shall comply with the standards in Table 1507.5.3. The valley flashing shall extend at least 8 inches (203 mm) from the center line each way and shall have a splash diverter rib not less than 3/4 inch (19 mm) high at the flow line formed as part of the flashing. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). For roof slopes under 7:12, in areas where the average daily  temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the
eaves causing a backup of water, the metal valley flashing shall have a 36-inch-wide (914 mm) underlayment directly under it consisting of one layer of underlayment running the full length of the valley, in addition to underlayment required for metal roof shingles. The metal valley flashing underlayment shall be solid cemented to the roofing underlayment or of a self adhering polymer modified bitumen sheet.
	1507.5.6 Flashing. Roof valley flashing shall be of corrosion-resistant metal of the same material as the roof covering or shall comply with the standards in Table 1507.4.3. The valley flashing shall extend at least 8 inches (203 mm) from the centerline each way and shall have a splash diverter rib not less than 0.75 inch (19.1 mm) high at the flow line formed as part of the flashing. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, the metal valley flashing shall have a 36-inch-wide (914 mm) underlayment directly under it consisting of one layer of underlayment running the full length of the valley, in addition to underlayment required for metal roof shingles. The metal valley flashing underlayment shall be solid cemented to the roofing underlayment for roof slopes under seven units vertical in 12 units horizontal (58-percent slope) or of self-adhering polymer-modified bitumen sheet.

	
	
1507.6 Mineral-surfaced roll roofing. The installation of mineral-surfaced roll roofing shall comply with this section.
		1507.6 Mineral-surfaced roll roofing. The installation of mineral-surfaced roll roofing shall comply with this section.
			
1507.6.1 Deck requirements. Mineral-surfaced roll roofing shall be fastened to solidly sheathed roofs.
		1507.6.1 Deck requirements. Mineral-surfaced roll roofing shall be fastened to solidly sheathed roofs.
			
1507.6.2 Deck slope. Mineral-surfaced roll roofing shall not be applied on roof slopes below one unit vertical in 12 units horizontal (8-percent slope).	
	1507.6.2 Deck slope. Mineral-surfaced roll roofing shall not be applied on roof slopes below one unit vertical in 12 units horizontal (8-percent slope).	

1507.6.3 Underlayment. Underlayment shall conform to ASTM D 226, Type I. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice barrier that consists of at least two layers of underlayment cemented together or of a self-adhering polymer-modified bitumen sheet, shall extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.
Exception: Detached accessory structures that contain no conditioned floor area.
	Mod 195

1507.7.3 Underlayment. Underlayment shall conform with ASTM D 226, Type I. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice shield that consists of at least two layers of underlayment cemented together or of a self-adhering polymer modified bitumen sheet, shall extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.

Mod 612

1507.7.3 Underlayment. Underlayment shall conform with ASTM D 226, Type I. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice shield that consists of at least two layers of underlayment cemented together or of a self-adhering polymer modified bitumen sheet, shall extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.

	1507.6.3 Underlayment. Underlayment shall conform to ASTM D 226, Type I or Type II or ASTM D 1970.   In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice barrier that consists of at least two layers of underlayment cemented together or of a self-adhering polymer-modified bitumen sheet, shall extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.

Exception: Detached accessory structures that contain no conditioned floor area.

(Note:  ASTM D 1970 should be ASTM D 1970-95)

	
	
1507.6.4 Material standards. Mineral-surfaced roll roofing shall conform to ASTM D 224, ASTM D 249, ASTM D
371 or ASTM D 3909.
		1507.6.4 Material standards. Mineral-surfaced roll roofing shall conform to ASTM D 224, ASTM D 249, ASTM D
371 or ASTM D 3909.
			
1507.7 Slate shingles. The installation of slate shingles shall comply with the provisions of this section.
		1507.7 Slate shingles. The installation of slate shingles shall comply with the provisions of this section.
			
1507.7.1 Deck requirements. Slate shingles shall be fastened to solidly sheathed roofs.
		1507.7.1 Deck requirements. Slate shingles shall be fastened to solidly sheathed roofs.
			
1507.7.2 Deck slope. Slate shingles shall only be used on slopes of four units vertical in 12 units horizontal (4:12) or greater.
		1507.7.2 Deck slope. Slate shingles shall only be used on slopes of four units vertical in 12 units horizontal (4:12) or greater.
			
1507.7.3 Underlayment. Underlayment shall comply with ASTM D 226, Type II. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice barrier that consists of at least two layers of underlayment cemented together or of a self-adhering polymer-modified bitumen sheet, shall extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.
Exception: Detached accessory structures that contain no conditioned floor area.
	Mod 195

1507.8.3 Underlayment. Underlayment shall comply with ASTM D 226, Type II. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice shield that consists of at least two layers of underlayment cemented together or of a self-adhering polymer modified bitumen sheet, shall extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.

	1507.7.3 Underlayment. Underlayment shall comply with ASTM D 226, Type II. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice barrier that consists of at least two layers of underlayment cemented together or of a self-adhering polymer-modified bitumen sheet, shall extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.

Exception: Detached accessory structures that contain no conditioned floor area.

	
1507.7.4 Material standards. Slate shingles shall comply with ASTM C 406.
		1507.7.4 Material standards. Slate shingles shall comply with ASTM C 406.
			
1507.7.5 Application. Minimum headlap for slate shingles shall be in accordance with Table 1507.7.5. Slate shingles shall be secured to the roof with two fasteners per slate.
		1507.7.5 Application. Minimum headlap for slate shingles shall be in accordance with Table 1507.7.5. Slate shingles shall be secured to the roof with two fasteners per slate.
			
TABLE 1507.7.5
SLATE SHINGLE HEADLAP
SLOPE
HEADLAP
(inches)
4:12 < slope < 8:12 4
8:12 < slope < 20:12 3

slope ³ 20:12 2
For SI: 1 inch = 25.4 mm.
		TABLE 1507.7.5
SLATE SHINGLE HEADLAP
SLOPE
HEADLAP
(inches)
4:12 < slope < 8:12 4
8:12 < slope < 20:12 3

slope ³ 20:12 2
For SI: 1 inch = 25.4 mm.
			
1507.7.6 Flashing. Flashing and  counterflashing shall be made with sheet metal. Valley flashing shall be a minimum
of 15 inches (381 mm) wide.Valley and flashing metal shall be a minimum uncoated thickness of 0.0179-inch
(0.455 mm) zinc-coated G90. Chimneys, stucco or brickwalls shall have a minimum of two plies of felt for a cap flashing consisting of a 4-inch-wide (102 mm) strip of felt set in plastic cement and extending 1 inch (25 mm) above the first felt and a top coating of plastic cement. The felt shall extend over the base flashing 2 inches
(51 mm).
	Mod 616

1507.8.6 Flashing.  Flashing and counter flashing shall be made with sheet metal.  Valley flashing shall be a minimum of 15 inches (381 mm) wide.  Valley and flashing metal shall be a minimum uncoated thickness of 0.019 in. (0.48 mm) thickness provided in Table 1507.3.9.2  nonferrous metal or stainless steel.  Chimneys, stucco or brick walls shall have a minimum of two plies of felt for a cap flashing consisting of a 4-inch (102 mm) wide strip of felt set in plastic cement and extending 1 inch (25.4 mm) above the first felt and a top coating of plastic cement.  The felt shall extend over the base flashing 2 inches (51 mm).
	1507.7.6 Flashing. Flashing and  counterflashing shall be made with sheet metal. Valley flashing shall be a minimum
of 15 inches (381 mm) wide.Valley and flashing metal shall be a minimum uncoated thickness of 0.0179-inch
(0.455 mm) thickness provided in Table 1507.3.9.2 nonferrous metal or stainless steel.  zinc-coated G90. Chimneys, stucco or brickwalls shall have a minimum of two plies of felt for a cap flashing consisting of a 4-inch-wide (102 mm) strip of felt set in plastic cement and extending 1 inch (25 mm) above the first felt and a top coating of plastic cement. The felt shall extend over the base flashing 2 inches
(51 mm).

	
1507.8 Wood shingles. The installation of wood shingles shall comply with the provisions of this section and Table 1507.8.
	Mod 197

1507.9 Slate type Wood shingles

	1507.8 Wood shingles. The installation of wood shingles shall comply with the provisions of this section and Table 1507.8.
			
1507.8.1 Deck requirements. Wood shingles shall be installed on solid or spaced sheathing. Where spaced sheathing is used, sheathing boards shall not be less than 1-inch by 4-inch (25 mm by 102 mm) nominal dimensions and shall be spaced on centers equal to the weather exposure to coincide with the placement of fasteners.
		1507.8.1 Deck requirements. Wood shingles shall be installed on solid or spaced sheathing. Where spaced sheathing is used, sheathing boards shall not be less than 1-inch by 4-inch (25 mm by 102 mm) nominal dimensions and shall be spaced on centers equal to the weather exposure to coincide with the placement of fasteners.
			
1507.8.1.1 Solid sheathing required. Solid sheathing is required in areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water.
	Mod 195

1507.9.1.1 Solid sheathing required. Solid sheathing is required in areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water.
	1507.8.1.1 Solid sheathing required. Solid sheathing is required in areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water.

	
1507.8.2 Deck slope. Wood shingles shall be installed on slopes of three units vertical in 12 units horizontal (25-percent slope) or greater.		1507.8.2 Deck slope. Wood shingles shall be installed on slopes of three units vertical in 12 units horizontal (25-percent slope) or greater.
			
1507.8.3 Underlayment. Underlayment shall comply with ASTM D 226, Type I. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice barrier that consists of at least two layers of underlayment cemented together or of a self-adhering polymer-modified bitumen sheet shall extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.
Exception: Detached accessory structures that contain no conditioned floor area.
		1507.8.3 Underlayment. Underlayment shall comply with ASTM D 226, Type I. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice barrier that consists of at least two layers of underlayment cemented together or of a self-adhering polymer-modified bitumen sheet shall extend from the eave’s edge to a point at least 24 inches (610 mm) inside the exterior wall line of the building.
Exception: Detached accessory structures that contain no conditioned floor area.
			
TABLE 1507.8
WOOD SHINGLE AND SHAKE INSTALLATION
ROOF ITEM WOOD SHINGLES WOOD SHAKES
1.  Roof slope
Wood shingles shall be installed on slopes of
three units vertical in 12 units horizontal (3:12)
or greater.
Wood shakes shall be installed on slopes of four units
vertical in 12 units horizontal (4:12) or greater.
2.  Deck requirement — —
Temperate climate Shingles shall be applied to roofs with solid or spaced sheathing. Where spaced sheathing is
used, sheathing boards shall not be 4 less than
1” ´ 4” nominal dimensions and shall be
spaced on center equal to the weather exposure
to coincide with the placement of fasteners.
Shakes shall be applied to roofs with solid or spaced
sheathing. Where spaced sheathing is used, sheathing
boards shall not be less than 1” ´ 4” nominal dimensions and shall be spaced on center equal to the weather exposure to coincide with the placement of fasteners.
When 1” ´ 4”  spaced sheathing is installed at 10 inches, boards must be installed between the sheathing boards.
In areas where the average daily temperature in January is 25¡ãF or less or where there is a possibility of ice forming along the eaves causing a backup of water.
Solid sheathing required. Solid sheathing is required.
3. Interlayment No requirements. Interlayment shall comply with ASTM D 226, Type 1.
4. Underlayment — —
Temperate climate Underlayment shall comply with ASTM D
226, Type 1.
Underlayment shall comply withASTMD226, Type 1.
In areas where the average daily
temperature in January is 25°F
or less or where there is a
possibility of ice forming along
the eaves causing a backup of
water.
An ice shield that consists of at least two layers
of underlayment cemented together or of a
self-adhering polymer-modified bitumen sheet
shall extend from the eave’s edge to a point at
least 24 inches inside the exterior wall line of
the building.
An ice shield that consists of at least two layers of
underlayment cemented together or of a self-adhering
polymer-modified bitumen sheet shall extend from the
eave’s edge to a point at least 24 inches inside the
exterior wall line of the building.
5. Application — —
Attachment Fasteners for wood shingles shall be corrosion
resistant with a minimum penetration of 0.75
inch into the sheathing. For sheathing less than
0.5 inch thick, the fasteners shall extend
through the sheathing.
Fasteners for wood shakes shall be corrosion resistant
with a minimum penetration of 0.75 inch into the
sheathing. For sheathing less than 0.5 inch thick, the
fasteners shall extend through the sheathing.
No. of fasteners Two per shingle. Two per shake.
Exposure Weather exposures shall not exceed those set forth in Table 1507.8.6.
Weather exposures shall not exceed those set forth in
Table 1507.9.7
Method Shingles shall be laid with a side lap of not less than 1.5 inches between joints in courses, and no two joints in any three adjacent courses shall be in direct alignment. Spacing between shingles shall be 0.25 to 0.375 inch.
Shakes shall be laid with a side lap of not less than 1.5 inches between joints in adjacent courses. Spacing between shakes shall not be less than 0.375 inch or more than 0.625 inch for shakes and tapersawn shakes of naturally durable wood and shall be 0.25 to 0.375 inch for preservative taper sawn shakes.
Flashing In accordance with Section 1507.8.7. In accordance with Section 1507.9.8.
For SI: 1 inch = 25.4 mm, °C = [(°F) - 32]/1.8.

	TABLE 1507.8
WOOD SHINGLE AND SHAKE INSTALLATION
ROOF ITEM WOOD SHINGLES WOOD SHAKES
1.  Roof slope
Wood shingles shall be installed on slopes of
three units vertical in 12 units horizontal (3:12)
or greater.
Wood shakes shall be installed on slopes of four units
vertical in 12 units horizontal (4:12) or greater.
2.  Deck requirement — —
Temperate climate Shingles shall be applied to roofs with solid or spaced sheathing. Where spaced sheathing is
used, sheathing boards shall not be 4 less than
1” ´ 4” nominal dimensions and shall be
spaced on center equal to the weather exposure
to coincide with the placement of fasteners.
Shakes shall be applied to roofs with solid or spaced
sheathing. Where spaced sheathing is used, sheathing
boards shall not be less than 1” ´ 4” nominal dimensions and shall be spaced on center equal to the weather exposure to coincide with the placement of fasteners.
When 1” ´ 4”  spaced sheathing is installed at 10 inches, boards must be installed between the sheathing boards.
In areas where the average daily temperature in January is 25¡ãF or less or where there is a possibility of ice forming along the eaves causing a backup of water.
Solid sheathing required. Solid sheathing is required.
3. Interlayment No requirements. Interlayment shall comply with ASTM D 226, Type 1.
4. Underlayment — —
Temperate climate Underlayment shall comply with ASTM D
226, Type 1.
Underlayment shall comply withASTMD226, Type 1.
In areas where the average daily
temperature in January is 25°F
or less or where there is a
possibility of ice forming along
the eaves causing a backup of
water.
An ice shield that consists of at least two layers
of underlayment cemented together or of a
self-adhering polymer-modified bitumen sheet
shall extend from the eave’s edge to a point at
least 24 inches inside the exterior wall line of
the building.
An ice shield that consists of at least two layers of
underlayment cemented together or of a self-adhering
polymer-modified bitumen sheet shall extend from the
eave’s edge to a point at least 24 inches inside the
exterior wall line of the building.
5. Application — —
Attachment Fasteners for wood shingles shall be corrosion
resistant with a minimum penetration of 0.75
inch into the sheathing. For sheathing less than
0.5 inch thick, the fasteners shall extend
through the sheathing.
Fasteners for wood shakes shall be corrosion resistant
with a minimum penetration of 0.75 inch into the
sheathing. For sheathing less than 0.5 inch thick, the
fasteners shall extend through the sheathing.
No. of fasteners Two per shingle. Two per shake.
Exposure Weather exposures shall not exceed those set forth in Table 1507.8.6.
Weather exposures shall not exceed those set forth in
Table 1507.9.7
Method Shingles shall be laid with a side lap of not less than 1.5 inches between joints in courses, and no two joints in any three adjacent courses shall be in direct alignment. Spacing between shingles shall be 0.25 to 0.375 inch.
Shakes shall be laid with a side lap of not less than 1.5 inches between joints in adjacent courses. Spacing between shakes shall not be less than 0.375 inch or more than 0.625 inch for shakes and tapersawn shakes of naturally durable wood and shall be 0.25 to 0.375 inch for preservative taper sawn shakes.
Flashing In accordance with Section 1507.8.7. In accordance with Section 1507.9.8.
For SI: 1 inch = 25.4 mm, °C = [(°F) - 32]/1.8.

	

	
1507.8.4 Material standards. Wood shingles shall be of naturally durable wood and comply with the requirements of Table 1507.8.4.
		1507.8.4 Material standards. Wood shingles shall be of naturally durable wood and comply with the requirements of Table 1507.8.4.
			
TABLE 1507.8.4
WOOD SHINGLE MATERIAL REQUIREMENTS
MATERIAL
APPLICABLE
MINIMUM GRADES GRADING RULES
Wood shingles of naturally
durable wood 1, 2 or 3 CSSB
CSSB = Cedar Shake and Shingle Bureau
	
	TABLE 1507.8.4
WOOD SHINGLE MATERIAL REQUIREMENTS
MATERIAL
APPLICABLE
MINIMUM GRADES GRADING RULES
Wood shingles of naturally
durable wood 1, 2 or 3 CSSB
CSSB = Cedar Shake and Shingle Bureau

	
1507.8.5 Attachment. Fasteners for wood shingles shall be corrosion resistant with a minimum penetration of 0.75 inch
(19.1 mm) into the sheathing. For sheathing less than 0.5 inch (12.7 mm) in thickness, the fasteners shall extend through the sheathing. Each shingle shall be attached with a minimum of two fasteners.
		1507.8.5 Attachment. Fasteners for wood shingles shall be corrosion resistant with a minimum penetration of 0.75 inch
(19.1 mm) into the sheathing. For sheathing less than 0.5 inch (12.7 mm) in thickness, the fasteners shall extend through the sheathing. Each shingle shall be attached with a minimum of two fasteners.
			
1507.8.6 Application. Wood shingles shall be laid with a side lap not less than 1.5 inches (38 mm) between joints in adjacent courses, and not be in direct alignment in alternate courses. Spacing between shingles shall be 0.25 to 0.375 inches (6.4 to 9.5 mm). Weather exposure for wood shingles shall not exceed that set in Table 1507.8.6.		1507.8.6 Application. Wood shingles shall be laid with a side lap not less than 1.5 inches (38 mm) between joints in adjacent courses, and not be in direct alignment in alternate courses. Spacing between shingles shall be 0.25 to 0.375 inches (6.4 to 9.5 mm). Weather exposure for wood shingles shall not exceed that set in Table 1507.8.6.			
TABLE 1507.8.6
WOOD SHINGLE WEATHER EXPOSURE AND ROOF SLOPE
ROOFING MATERIAL
LENGTH(i
nches) GRADE
EXPOSURE (inches)
3:12 pitch
to < 4:12
4:12 pitch
or steeper
Shingles of naturally
durable wood
16
No. 1
No. 2
No. 3
3.75
3.5
3
5
4
3.5
18
No.1
No. 2
No. 3
4.25
4
24
No. 1
No. 2
No. 3
5.75
5.5
5
7.5
6.5
5.5
For SI: 1 inch = 25.4 mm.

	
TABLE 1507.8.6
WOOD SHINGLE WEATHER EXPOSURE AND ROOF SLOPE
ROOFING MATERIAL
LENGTH(i
nches) GRADE
EXPOSURE (inches)
3:12 pitch
to < 4:12
4:12 pitch
or steeper
Shingles of naturally
durable wood
16
No. 1
No. 2
No. 3
3.75
3.5
3
5
4
3.5
18
No.1
No. 2
No. 3
4.25
4
24
No. 1
No. 2
No. 3
5.75
5.5
5
7.5
6.5
5.5
For SI: 1 inch = 25.4 mm.

	

1507.8.7 Flashing. At the juncture of the roof and vertical surfaces, flashing and counter flashing shall be provided in accordance with the manufacturer’s installation instructions, and where of metal, shall not be less than 0.019-inch
(0.48 mm) (No. 26 galvanized sheet gage) corrosion-resistant metal. The valley flashing shall extend at least 11 inches
(279 mm) from the centerline each way and have a splash diverter rib not less than 1 inch (25 mm) high at the flow line formed as part of the flashing. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). For roof slopes of three units vertical in 12 units horizontal (25-percent slope) and over, the valley flashing shall have a 36-inch-wide (914mm) underlayment of one layer of Type I underlayment running the full length of the valley, in addition to other required underlayment. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, the metal valley  flashing underlayment shall be solid cemented to the roofing underlayment for slopes under seven units vertical in 12 units horizontal (58-percent slope).
	
	1507.8.7 Flashing. At the juncture of the roof and vertical surfaces, flashing and counter flashing shall be provided in accordance with the manufacturer’s installation instructions, and where of metal, shall not be less than 0.019-inch
(0.48 mm) (No. 26 galvanized sheet gage) corrosion-resistant metal. The valley flashing shall extend at least 11 inches
(279 mm) from the centerline each way and have a splash diverter rib not less than 1 inch (25 mm) high at the flow line formed as part of the flashing. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). For roof slopes of three units vertical in 12 units horizontal (25-percent slope) and over, the valley flashing shall have a 36-inch-wide (914mm) underlayment of one layer of Type I underlayment running the full length of the valley, in addition to other required underlayment. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, the metal valley  flashing underlayment shall be solid cemented to the roofing underlayment for slopes under seven units vertical in 12 units horizontal (58-percent slope).

	
1507.9 Wood shakes. The installation of wood shakes shall comply with the provisions of this section and Table 1507.8.
		1507.9 Wood shakes. The installation of wood shakes shall comply with the provisions of this section and Table 1507.8.
			
1507.9.1 Deck requirements. Wood shakes shall only be used on solid or spaced sheathing. Where spaced sheathing
is used, sheathing boards shall not be less than 1-inch by 4-inch (25 mm by 102 mm) nominal dimensions and shall be spaced on centers equal to the weather exposure to coincide with the placement of fasteners. Where 1-inch by 4-inch (25 mm by 102 mm) spaced sheathing is installed at
10 inches (254 mm) o.c., additional 1-inch by 4-inch (25 mm by 102 mm) boards shall be installed between the sheathing boards.
		1507.9.1 Deck requirements. Wood shakes shall only be used on solid or spaced sheathing. Where spaced sheathing
is used, sheathing boards shall not be less than 1-inch by 4-inch (25 mm by 102 mm) nominal dimensions and shall be spaced on centers equal to the weather exposure to coincide with the placement of fasteners. Where 1-inch by 4-inch (25 mm by 102 mm) spaced sheathing is installed at
10 inches (254 mm) o.c., additional 1-inch by 4-inch (25 mm by 102 mm) boards shall be installed between the sheathing boards.
			
1507.9.1.1 Solid sheathing required. Solid sheathing is required in areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water.
	Mod 195

1507.10.1.1 Solid sheathing required. Solid sheathing is required in areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water.
	1507.9.1.1 Solid sheathing required. Solid sheathing is required in areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water.
			
1507.9.2 Deck slope. Wood shakes shall only be used on slopes of four units vertical in 12 units horizontal (33-percent slope) or greater.

		1507.9.2 Deck slope. Wood shakes shall only be used on slopes of four units vertical in 12 units horizontal (33-percent slope) or greater.
			
1507.9.3 Underlayment. Underlayment shall comply with ASTM D 226, Type I. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice barrier that consists of at least two layers of underlayment cemented together or a self-adhering polymer-modified bitumen sheet shall extend from the edge of the eave to a point at least 24 inches (610 mm) inside the exterior wall line of the building.
Exception: Detached accessory structures that contain no conditioned floor area.
	Mod 195

1507.10.3 Underlayment. Underlayment shall comply with ASTM D 226, Type I. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice shield that consists of at least two layers of underlayment cemented together or a self-adhering polymer modified bitumen sheet, shall extend from the edge of the eave to a point at least 24 inches (610 mm) inside the exterior wall line of the building.
	1507.9.3 Underlayment. Underlayment shall comply with ASTM D 226, Type I. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, an ice barrier that consists of at least two layers of underlayment cemented together or a self-adhering polymer-modified bitumen sheet shall extend from the edge of the eave to a point at least 24 inches (610 mm) inside the exterior wall line of the building.
Exception: Detached accessory structures that contain no conditioned floor area.
			
1507.9.4 Interlayment. Interlayment shall comply with ASTM D 226, Type I.
		1507.9.4 Interlayment. Interlayment shall comply with ASTM D 226, Type I.
			
1507.9.5 Material standards. Wood shakes shall comply with the requirements of Table 1507.9.5.
		1507.9.5 Material standards. Wood shakes shall comply with the requirements of Table 1507.9.5.
			
TABLE 1507.9.5
WOOD SHAKE MATERIAL REQUIREMENTS
MATERIAL
MINIMUM
GRADES
APPLICABLE
GRADING
RULES
Wood shakes of naturally durable wood 1 CSSB
Taper sawn shakes of naturally durable
wood 1 or 2 CSSB
Preservative-treated shakes and
shingles of naturally durable wood 1 CSSB
Fire-retardant-treated shakes and
shingles of naturally durable wood 1 CSSB
Preservative-treated taper sawn shakes
of Southern yellow pine treated in
accordance with AWPA Standard C2
1 or 2 TFS
CSSB = Cedar Shake and Shingle Bureau.
TFS = Forest Products Laboratory of the Texas Forest Services.
	
	TABLE 1507.9.5
WOOD SHAKE MATERIAL REQUIREMENTS
MATERIAL
MINIMUM
GRADES
APPLICABLE
GRADING
RULES
Wood shakes of naturally durable wood 1 CSSB
Taper sawn shakes of naturally durable
wood 1 or 2 CSSB
Preservative-treated shakes and
shingles of naturally durable wood 1 CSSB
Fire-retardant-treated shakes and
shingles of naturally durable wood 1 CSSB
Preservative-treated taper sawn shakes
of Southern yellow pine treated in
accordance with AWPA Standard C2
1 or 2 TFS
CSSB = Cedar Shake and Shingle Bureau.
TFS = Forest Products Laboratory of the Texas Forest Services.

	
1507.9.6 Attachment. Fasteners for wood shakes shall be corrosion resistant with a minimum penetration of 0.75 inch
(19.1 mm) into the sheathing. For sheathing less than 0.5 inch (12.7 mm) in thickness, the fasteners shall extend
through the sheathing. Each shake shall be attached with a minimum of two fasteners.
		1507.9.6 Attachment. Fasteners for wood shakes shall be corrosion resistant with a minimum penetration of 0.75 inch
(19.1 mm) into the sheathing. For sheathing less than 0.5 inch (12.7 mm) in thickness, the fasteners shall extend
through the sheathing. Each shake shall be attached with a minimum of two fasteners.
			
1507.9.7Application.Wood shakes shall be laid with a side lap not less than 1.5 inches (38 mm) between joints in adjacent courses. Spacing between shakes in the same course shall be 0.375 to 0.625 inches (9.5 to 15.9 mm) for shakes and taper sawn shakes of naturally durable wood and shall be 0.25 to 0.375 inch (6.4 to 9.5 mm) for preservative taper sawn shakes. Weather exposure for wood shakes shall not exceed those set in Table 1507.9.7.
		1507.9.7Application.Wood shakes shall be laid with a side lap not less than 1.5 inches (38 mm) between joints in adjacent courses. Spacing between shakes in the same course shall be 0.375 to 0.625 inches (9.5 to 15.9 mm) for shakes and taper sawn shakes of naturally durable wood and shall be 0.25 to 0.375 inch (6.4 to 9.5 mm) for preservative taper sawn shakes. Weather exposure for wood shakes shall not exceed those set in Table 1507.9.7.			
TABLE 1507.9.7
WOOD SHAKE WEATHER EXPOSURE
AND ROOF SLOPE
ROOFING MATERIAL
LENGTH
(inches) GRADE
EXPOSURE
(inches)
4:12 PITCH
OR STEEPER
Shakes of naturally
Durable wood
18
24
No. 1
No. 1
7.5
10a
Preservative-treated taper
sawn shakes of Southern
yellow pine
18
24
No. 1
No. 1
7.5
10
18
24
No. 2
No. 2
5.5
7.5
Taper sawn shakes of
naturally durable wood
18
24
No. 1
No. 1
7.5
10
18
24
No. 2
No. 2
5.5
7.5
For SI: 1 inch = 25.4 mm.
a. For 24-inch by 0.375-inch handsplit shakes, the maximum exposure is 7.5
inches.

	TABLE 1507.9.7
WOOD SHAKE WEATHER EXPOSURE
AND ROOF SLOPE
ROOFING MATERIAL
LENGTH
(inches) GRADE
EXPOSURE
(inches)
4:12 PITCH
OR STEEPER
Shakes of naturally
Durable wood
18
24
No. 1
No. 1
7.5
10a
Preservative-treated taper
sawn shakes of Southern
yellow pine
18
24
No. 1
No. 1
7.5
10
18
24
No. 2
No. 2
5.5
7.5
Taper sawn shakes of
naturally durable wood
18
24
No. 1
No. 1
7.5
10
18
24
No. 2
No. 2
5.5
7.5
For SI: 1 inch = 25.4 mm.
a. For 24-inch by 0.375-inch handsplit shakes, the maximum exposure is 7.5
inches.

	

1507.9.8 Flashing. At the juncture of the roof and vertical surfaces, flashing and counter flashing shall be provided in accordance with the manufacturer’s installation instructions, and where of metal, shall not be less than 0.019-inch
(0.48 mm) (No. 26 galvanized sheet gage) corrosion-resistant metal. The valley flashing shall extend at least 11 inches
(279 mm) from the centerline each way and have a splash diverter rib not less than 1 inch (25 mm) high at the flow line formed as part of the flashing. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). For roof slopes of 3 units vertical in 12 units horizontal
(25-percent slope) and over, the valley flashing shall have a 36-inch-wide
(914 mm) underlayment of one layer of Type I underlayment running the full length of the valley, in addition to other required underlayment. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, the metal valley flashing underlayment shall be solid cemented to the roofing underlayment for slopes under seven units vertical in 12 units horizontal (58-percent slope).
	
	1507.9.8 Flashing. At the juncture of the roof and vertical surfaces, flashing and counter flashing shall be provided in accordance with the manufacturer’s installation instructions, and where of metal, shall not be less than 0.019-inch
(0.48 mm) (No. 26 galvanized sheet gage) corrosion-resistant metal. The valley flashing shall extend at least 11 inches
(279 mm) from the centerline each way and have a splash diverter rib not less than 1 inch (25 mm) high at the flow line formed as part of the flashing. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). For roof slopes of 3 units vertical in 12 units horizontal
(25-percent slope) and over, the valley flashing shall have a 36-inch-wide
(914 mm) underlayment of one layer of Type I underlayment running the full length of the valley, in addition to other required underlayment. In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, the metal valley flashing underlayment shall be solid cemented to the roofing underlayment for slopes under seven units vertical in 12 units horizontal (58-percent slope).

	
1507.10 Built-up roofs. The installation of built-up roofs shall comply with the provisions of this section.
		1507.10 Built-up roofs. The installation of built-up roofs shall comply with the provisions of this section.
			
1507.10.2 Material standards. Built-up roof covering materials shall comply with the standards in Table 1507.10.2.
		1507.10.2 Material standards. Built-up roof covering materials shall comply with the standards in Table 1507.10.2.
			
	Mod 685   (New Section) 

1508.3.3 Red rosin paper shall be used when the membrane is applied directly to a wood deck or cementitious fiber decks.
	Red rosin paper.  Red rosin paper shall be used when the membrane is applied directly to a wood deck or cementitious fiber decks.

(New Section here)			
1507.11 Modified bitumen roofing. The installation of modified bitumen roofing shall comply with the provisions of this section.
		1507.11 Modified bitumen roofing. The installation of modified bitumen roofing shall comply with the provisions of this section.
			
TABLE 1507.10.2
BUILT-UP ROOFING MATERIAL STANDARDS
MATERIAL STANDARD STANDARD
Acrylic coatings used in roofing ASTM D 6083
Aggregate surfacing ASTM D 1863
Asphalt adhesive used in roofing ASTM D 3747
Asphalt cements used in roofing ASTM D 3019; D 2822;
D 4586
Asphalt-coated glass fiber base sheet ASTM D 4601
Asphalt coatings used in roofing ASTM D1227; D 2823; D
4479
Asphalt glass felt ASTM D 2178
Asphalt primer used in roofing ASTM D 41
Asphalt-saturated and asphalt-coated
organic felt base sheet ASTM D 2626
Asphalt-saturated organic felt
(perforated) ASTM D 226
Asphalt used in roofing ASTM D 312
Coal-tar cements used in roofing ASTM D 4022; D 5643
Coal-tar saturated organic felt ASTM D 227
Coal-tar pitch used in roofing ASTM D 450; Type I or II
Coal-tar primer used in roofing,
damproofing and waterproofing ASTM D 43
Glass mat, coal tar ASTM D 4990
Glass mat, venting type ASTM D 4897
Mineral-surfaced inorganic cap sheet ASTM D 3909
Thermoplastic fabrics used in roofing ASTM D 5665, D 5726
	
	TABLE 1507.10.2
BUILT-UP ROOFING MATERIAL STANDARDS
MATERIAL STANDARD STANDARD
Acrylic coatings used in roofing ASTM D 6083
Aggregate surfacing ASTM D 1863
Asphalt adhesive used in roofing ASTM D 3747
Asphalt cements used in roofing ASTM D 3019; D 2822;
D 4586
Asphalt-coated glass fiber base sheet ASTM D 4601
Asphalt coatings used in roofing ASTM D1227; D 2823; D
4479
Asphalt glass felt ASTM D 2178
Asphalt primer used in roofing ASTM D 41
Asphalt-saturated and asphalt-coated
organic felt base sheet ASTM D 2626
Asphalt-saturated organic felt
(perforated) ASTM D 226
Asphalt used in roofing ASTM D 312
Coal-tar cements used in roofing ASTM D 4022; D 5643
Coal-tar saturated organic felt ASTM D 227
Coal-tar pitch used in roofing ASTM D 450; Type I or II
Coal-tar primer used in roofing,
damproofing and waterproofing ASTM D 43
Glass mat, coal tar ASTM D 4990
Glass mat, venting type ASTM D 4897
Mineral-surfaced inorganic cap sheet ASTM D 3909
Thermoplastic fabrics used in roofing ASTM D 5665, D 5726

	
1507.11.1 Slope. Modified bitumen membrane roofs shall have a design slope of a minimum of one-fourth unit vertical in 12 units horizontal (2-percent slope) for drainage.
		1507.11.1 Slope. Modified bitumen membrane roofs shall have a design slope of a minimum of one-fourth unit vertical in 12 units horizontal (2-percent slope) for drainage.
			
1507.11.2 Material standards. Modified bitumen roof coverings shall comply with CGSB 37-GP-56M, ASTM D 6162, ASTM D 6163, ASTM D 6164, ASTM D 6222, ASTM D 6223 and ASTM D 6298.
	Mod 198

1508.5.2 Material standards. Modified bitumen roof coverings shall comply with CGSB 37-GP-56M, ASTM D 6162, ASTM D 6163, or ASTM D 6164, ASTM D 6222, ASTM D 6223, and ASTM D 6298.

	1507.11.2 Material standards. Modified bitumen roof coverings shall comply with CGSB 37-GP-56M, ASTM D 6162, ASTM D 6163, ASTM D 6164, ASTM D 6222, ASTM D 6223 and ASTM D 6298.
			
1507.12 Thermoset single-ply roofing. The installation of thermoset single-ply roofing shall comply with the provisions of this section.
	
	1507.12 Thermoset single-ply roofing. The installation of thermoset single-ply roofing shall comply with the provisions of this section.

	
1507.12.1 Slope. Thermoset single-ply membrane roofs shall have a design slope of a minimum of one-fourth unit vertical in 12 units horizontal (2-percent slope) for drainage.
		1507.12.1 Slope. Thermoset single-ply membrane roofs shall have a design slope of a minimum of one-fourth unit vertical in 12 units horizontal (2-percent slope) for drainage.
			
1507.12.2 Material standards. Thermoset single-ply roof coverings shall comply with RMA RP-1, RP-2 or RP-3, or
ASTM D 4637, ASTM D 5019 or CGSB 37-GP-52M.
		1507.12.2 Material standards. Thermoset single-ply roof coverings shall comply with RMA RP-1, RP-2 or RP-3, or
ASTM D 4637, ASTM D 5019 or CGSB 37-GP-52M.
			
1507.13 Thermoplastic single-ply roofing. The installation of thermoplastic single-ply roofing shall comply with the provisions of this section.
		1507.13 Thermoplastic single-ply roofing. The installation of thermoplastic single-ply roofing shall comply with the provisions of this section.
			
1507.13.1 Slope. Thermoplastic single-ply membrane roofs shall have a design slope of a minimum of one-fourth unit vertical in 12 units horizontal (2-percent slope).
		1507.13.1 Slope. Thermoplastic single-ply membrane roofs shall have a design slope of a minimum of one-fourth unit vertical in 12 units horizontal (2-percent slope).
			
1507.13.2 Material standards. Thermoplastic single-ply roof coverings shall comply with ASTM D 4434 or CGSB 37-GP-54M. 
		1507.13.2 Material standards. Thermoplastic single-ply roof coverings shall comply with ASTM D 4434 or CGSB 37-GP-54M.			
1507.14 Sprayed polyurethane foam roofing. The installation of sprayed polyurethane foam roofing shall comply with the provisions of this section.
		1507.14 Sprayed polyurethane foam roofing. The installation of sprayed polyurethane foam roofing shall comply with the provisions of this section.
			
1507.14.1 Slope. Sprayed polyurethane foam roofs shall have a design slope of a minimum of one-fourth unit vertical in 12 units horizontal (2-percent slope) for drainage.
		1507.14.1 Slope. Sprayed polyurethane foam roofs shall have a design slope of a minimum of one-fourth unit vertical in 12 units horizontal (2-percent slope) for drainage.
			
1507.14.2 Material standards. Spray-applied polyurethane foam insulation shall comply with ASTM C 1029.
		1507.14.2 Material standards. Spray-applied polyurethane foam insulation shall comply with ASTM C 1029.
			
1507.14.3 Application. Foamed-in-place roof insulation shall be installed in accordance with the manufacturer’s instructions. A liquid-applied protective coating that complies with Section 1507.15 shall be applied no less than 2 hours nor more than 72 hours following the application of the foam.
		1507.14.3 Application. Foamed-in-place roof insulation shall be installed in accordance with the manufacturer’s instructions. A liquid-applied protective coating that complies with Section 1507.15 shall be applied no less than 2 hours nor more than 72 hours following the application of the foam.
			
1507.14.4 Foam plastics. Foam plastic materials and installation shall comply with Chapter 26.
		1507.14.4 Foam plastics. Foam plastic materials and installation shall comply with Chapter 26.
			
1507.15 Liquid-applied coatings. The installation of liquid-applied coatings shall comply with the provisions of this section.		1507.15 Liquid-applied coatings. The installation of liquid-applied coatings shall comply with the provisions of this section.
			
1507.15.1 Slope. Liquid-applied roofs shall have a design slope of a minimum of one-fourth unit vertical in 12 units horizontal (2-percent slope).
		1507.15.1 Slope. Liquid-applied roofs shall have a design slope of a minimum of one-fourth unit vertical in 12 units horizontal (2-percent slope).
			
1507.15.2 Material standards. Liquid-applied roof coatings shall comply with ASTM C 836, ASTM C 957, 
ASTM D 6083, ASTM D 1227 or
ASTM D 3468.
	Mod 629

1508.9.2  Material standards.  Liquid-applied roof coatings shall comply with ASTM C 836, ASTM C 957, ASTM D 1227 or ASTM D 3468 or ASTM D 6083.

	1507.15.2 Material standards. Liquid-applied roof coatings shall comply with ASTM C 836, ASTM C 957, 
ASTM D 6083, ASTM D 1227 or
ASTM D 3468.
			
SECTION 1508
ROOF INSULATION
		SECTION 1508
ROOF INSULATION
			
1508.1 General. The use of above-deck thermal insulation shall be permitted provided such insulation is covered with an approved roof covering and passes the tests of FM 4450 or UL 1256 when tested as an assembly. 
Exception: Foam plastic roof insulation shall conform to the material and installation requirements of Chapter 26.
		1508.1 General. The use of above-deck thermal insulation shall be permitted provided such insulation is covered with an approved roof covering and passes the tests of FM 4450 or UL 1256 when tested as an assembly. 
Exception: Foam plastic roof insulation shall conform to the material and installation requirements of Chapter 26.
			
1508.1.1 Cellulosic fiberboard. Cellulosic fiberboard roof insulation shall conform to the material and installation requirements of Chapter 23.
		1508.1.1 Cellulosic fiberboard. Cellulosic fiberboard roof insulation shall conform to the material and installation requirements of Chapter 23.
			
SECTION 1509
ROOFTOP STRUCTURES
	
	SECTION 1509
ROOFTOP STRUCTURES

	
1509.1 General. The provisions of this section shall govern the construction of rooftop structures.		1509.1 General. The provisions of this section shall govern the construction of rooftop structures.			
1509.2 Penthouses. A penthouse or other projection above the roof in structures of other than Type I construction shall not exceed 28 feet (8534 mm) above the roof where used as an enclosure for tanks or for elevators that run to the roof and in all other cases shall not extend more than 18 feet (8534 mm) above the roof. The aggregate area of penthouses and other rooftop structures shall not exceed one-third the area of the supporting roof.
A penthouse, bulkhead or any other similar projection above the roof shall not be used for purposes other than shelter of mechanical equipment or shelter of vertical shaft openings in the roof. Provisions such as louvers, louver blades or flashing shall be made to protect the mechanical equipment and the building interior from the elements. Penthouses or bulkheads used for purposes other than permitted by this section shall conform to the requirements of this code for an additional story. The restrictions of this section shall not prohibit the placing of wood flagpoles or similar structures on the roof of any building.
	
	1509.2 Penthouses. A penthouse or other projection above the roof in structures of other than Type I construction shall not exceed 28 feet (8534 mm) above the roof where used as an enclosure for tanks or for elevators that run to the roof and in all other cases shall not extend more than 18 feet (8534 mm) above the roof. The aggregate area of penthouses and other rooftop structures shall not exceed one-third the area of the supporting roof.
A penthouse, bulkhead or any other similar projection above the roof shall not be used for purposes other than shelter of mechanical equipment or shelter of vertical shaft openings in the roof. Provisions such as louvers, louver blades or flashing shall be made to protect the mechanical equipment and the building interior from the elements. Penthouses or bulkheads used for purposes other than permitted by this section shall conform to the requirements of this code for an additional story. The restrictions of this section shall not prohibit the placing of wood flagpoles or similar structures on the roof of any building.

	
	
1509.2.1 Type of construction. Penthouses shall be constructed with walls, floors and roof as required for the building.
Exceptions:
1. On buildings of Type I and II construction, the exterior walls and roofs of penthouses with a fire separation distance of more than 5 feet (1524 mm) and less than 20 feet (6096 mm) shall be of at least 1-hour fire-resistance-rated noncombustible construction. Walls and roofs with a fire separation distance of 20 feet (6096 mm) or greater shall be of noncombustible construction. Interior framing and walls shall be of noncombustible construction.
2. On buildings of Type III, IV and V construction, the exterior walls of penthouses with a fire separation distance of more than 5 feet (1524 mm) and less than 20 feet (6096 mm) shall be at least 1-hour fire-resistance-rated construction. Walls with a fire separation distance of 20 feet (6096 mm) or greater from a common property line shall be of Type IV or noncombustible construction. Roofs shall be constructed of materials and fire-resistance rated as required in Table 601. Interior framing and walls shall be Type IV or noncombustible construction.
3. Unprotected noncombustible enclosures housing only mechanical equipment and located with a minimum fire separation distance of 20 feet (6096 mm) shall be permitted.
4. On one-story buildings, combustible unroofed mechanical equipment screens, fences or similar enclosures are permitted where located with a fire separation distance of at least 20 feet (6096 mm) from adjacent property lines and where not exceeding 4 feet (1219 mm) in height above the roof surface.
5. Dormers shall be of the same type of construction as the roof on which they are placed, or of the exterior walls of the building. 	
	1509.2.1 Type of construction. Penthouses shall be constructed with walls, floors and roof as required for the building.
Exceptions:
1. On buildings of Type I and II construction, the exterior walls and roofs of penthouses with a fire separation distance of more than 5 feet (1524 mm) and less than 20 feet (6096 mm) shall be of at least 1-hour fire-resistance-rated noncombustible construction. Walls and roofs with a fire separation distance of 20 feet (6096 mm) or greater shall be of noncombustible construction. Interior framing and walls shall be of noncombustible construction.
2. On buildings of Type III, IV and V construction, the exterior walls of penthouses with a fire separation distance of more than 5 feet (1524 mm) and less than 20 feet (6096 mm) shall be at least 1-hour fire-resistance-rated construction. Walls with a fire separation distance of 20 feet (6096 mm) or greater from a common property line shall be of Type IV or noncombustible construction. Roofs shall be constructed of materials and fire-resistance rated as required in Table 601. Interior framing and walls shall be Type IV or noncombustible construction.
3. Unprotected noncombustible enclosures housing only mechanical equipment and located with a minimum fire separation distance of 20 feet (6096 mm) shall be permitted.
4. On one-story buildings, combustible unroofed mechanical equipment screens, fences or similar enclosures are permitted where located with a fire separation distance of at least 20 feet (6096 mm) from adjacent property lines and where not exceeding 4 feet (1219 mm) in height above the roof surface.
5. Dormers shall be of the same type of construction as the roof on which they are placed, or of the exterior walls of the building. 	

1509.3 Tanks. Tanks having a capacity of more than 500 gallons (2m3) placed in or on a building shall be supported on masonry, reinforced concrete, steel or Type IV construction provided that, where such supports are located in the building above the lowest story, the support shall be fire-resistance rated as required for Type IA construction.

		1509.3 Tanks. Tanks having a capacity of more than 500 gallons (2m3) placed in or on a building shall be supported on masonry, reinforced concrete, steel or Type IV construction provided that, where such supports are located in the building above the lowest story, the support shall be fire-resistance rated as required for Type IA construction.
			
1509.3.1 Valve. Such tanks shall have in he bottom or on the side near the bottom, a pipe or outlet, fitted with a suitable quick opening valve for discharging the contents in an emergency through an adequate drain.
	
	1509.3.1 Valve. Such tanks shall have in he bottom or on the side near the bottom, a pipe or outlet, fitted with a suitable quick opening valve for discharging the contents in an emergency through an adequate drain.

	
1509.3.2 Location. Such tanks shall not be placed over or near a line of stairs or an elevator shaft, unless there is a solid roof or floor underneath the tank.
		1509.3.2 Location. Such tanks shall not be placed over or near a line of stairs or an elevator shaft, unless there is a solid roof or floor underneath the tank.

1509.3.3 Tank cover. Unenclosed roof tanks shall have covers sloping toward the outer edges.
		1509.3.3 Tank cover. Unenclosed roof tanks shall have covers sloping toward the outer edges.
			
1509.4 Cooling towers. Cooling towers in excess of 250 square feet (23.2 m2) in base area or in excess of 15 feet (4572 mm) high where located on buildings more than 50 feet (15 240 mm) high shall be of noncombustible construction. Cooling towers shall not exceed one-third of the supporting roof area.
Exception: Drip boards and the enclosing construction of wood not less than 1 inch (25 mm) nominal thickness, provided the wood is covered on the exterior of the tower with noncombustible material.

		1509.4 Cooling towers. Cooling towers in excess of 250 square feet (23.2 m2) in base area or in excess of 15 feet (4572 mm) high where located on buildings more than 50 feet (15 240 mm) high shall be of noncombustible construction. Cooling towers shall not exceed one-third of the supporting roof area.
Exception: Drip boards and the enclosing construction of wood not less than 1 inch (25 mm) nominal thickness, provided the wood is covered on the exterior of the tower with noncombustible material.
			
1509.5 Towers, spires, domes and cupolas. Any tower, spire, dome or cupola shall be of a type of construction not less in fire-resistance rating than required for the building to which it is attached except that any such tower, spire, dome or cupola that exceeds 85 feet (25 908 mm) in height above grade, or exceeds 200 square feet (18.6m2) in horizontal area or is used for any purpose other than a belfry or an architectural embellishment shall be constructed of and supported on Type I or II construction.
	
	1509.5 Towers, spires, domes and cupolas. Any tower, spire, dome or cupola shall be of a type of construction not less in fire-resistance rating than required for the building to which it is attached except that any such tower, spire, dome or cupola that exceeds 85 feet (25 908 mm) in height above grade, or exceeds 200 square feet (18.6m2) in horizontal area or is used for any purpose other than a belfry or an architectural embellishment shall be constructed of and supported on Type I or II construction.

	
1509.5.1 Noncombustible construction required. Any tower, spire, dome or cupola that exceeds 60 feet (18 288) in height above the highest point at which it comes in contact with the roof, or that exceeds 200 square feet (18.6 m2) in area at any horizontal section, or which is intended to be used for any purpose other than a belfry or architectural embellishment, shall be entirely constructed of and supported by noncombustible materials. Such structures shall be separated from the building below by construction having a fire-resistance rating of not less than 1.5 hours with openings protected with a minimum 1.5-hour fire-protection rating.
Structures, except aerial supports 12 feet (3658 mm) high or less, flagpoles, water tanks and cooling towers, placed above the roof of any building more than 50 feet (15
240 mm) in height, shall be of noncombustible material and shall be supported by construction of noncombustible material.	
	1509.5.1 Noncombustible construction required. Any tower, spire, dome or cupola that exceeds 60 feet (18 288) in height above the highest point at which it comes in contact with the roof, or that exceeds 200 square feet (18.6 m2) in area at any horizontal section, or which is intended to be used for any purpose other than a belfry or architectural embellishment, shall be entirely constructed of and supported by noncombustible materials. Such structures shall be separated from the building below by construction having a fire-resistance rating of not less than 1.5 hours with openings protected with a minimum 1.5-hour fire-protection rating.
Structures, except aerial supports 12 feet (3658 mm) high or less, flagpoles, water tanks and cooling towers, placed above the roof of any building more than 50 feet (15
240 mm) in height, shall be of noncombustible material and shall be supported by construction of noncombustible material.

	
1509.5.2 Towers and spires. Towers and spires where enclosed shall have exterior walls as required for the building to which they are attached. The roof covering of spires shall be of a class of roof covering as required for the main roof of the rest of the structure.
		1509.5.2 Towers and spires. Towers and spires where enclosed shall have exterior walls as required for the building to which they are attached. The roof covering of spires shall be of a class of roof covering as required for the main roof of the rest of the structure.
			
SECTION 1510
REROOFING		SECTION 1510
REROOFING
			
1510.1 General. Materials and methods of application used for recovering or replacing an existing roof covering shall comply with the requirements of Chapter 15.
Exception: Reroofing shall not be required to meet the minimum design slope requirement of one-quarter unit vertical in 12 units horizontal (2-percent slope) in Section 1507 for roofs that provide positive roof drainage.
		1510.1 General. Materials and methods of application used for recovering or replacing an existing roof covering shall comply with the requirements of Chapter 15.
Exception: Reroofing shall not be required to meet the minimum design slope requirement of one-quarter unit vertical in 12 units horizontal (2-percent slope) in Section 1507 for roofs that provide positive roof drainage.
			
1510.2 Structural and construction loads. Structural roof components shall be capable of supporting the roof-covering system and the material and equipment loads that will be encountered during installation of the system.
	
	1510.2 Structural and construction loads. Structural roof components shall be capable of supporting the roof-covering system and the material and equipment loads that will be encountered during installation of the system.

	

1510.3 Recovering versus replacement. New roof coverings shall not be installed without first removing all existing layers of roof coverings where any of the following conditions occur:
1. Where the existing roof or roof covering is water soaked or has deteriorated to the point that the existing roof or roof covering is not adequate as a base for additional roofing.
2. Where the existing roof covering is wood shake, slate, clay, cement or asbestos-cement tile.
3. Where the existing roof has two or more applications of any type of roof covering.
Exceptions:
1. Complete and separate roofing systems, such as standing-seam metal roof systems, that are designed to transmit the roof loads directly to the building’s structural system and that do not rely on existing roofs and roof coverings for support, shall not require the removal of existing roof coverings.
2. Metal panel, metal shingle, and concrete and clay tile roof coverings shall be permitted to be installed over existing wood shake roofs when applied in accordance with Section 1510.4.
	Mod 631    

1510.3 Recovering vs replacement.  New roof coverings shall not be installed without first removing existing roof coverings where any of the following conditions occur.

1.		When the old roofing is water-soaked or deteriorated to the point that it is not suitable as a base for additional roofing.
2.		When blisters exist in any roofing, unless blisters are cut or scraped open and nailed remaining materials secured down before applying additional roofing.
3.		When the existing roof surface is gravel or the like, unless the gravel shall be thoroughly removed or all loose gravel removed and approved base material installed before applying additional roofing.
4.		When existing roof is slate or the like.
5.		When sheathing or supports are deteriorated to the point that the roof structural system is not substantial enough to support recovering.
6.		When existing roof has two or more applications of any type roofing material.  Conformance with this item shall make replacement mandatory.
	1510.3 Recovering versus replacement. New roof coverings shall not be installed without first removing all existing layers of roof coverings where any of the following conditions occur:
1. Where the existing roof or roof covering is water soaked or has deteriorated to the point that the existing roof or roof covering is not adequate as a base for additional roofing.
2. Where the existing roof covering is wood shake, slate, clay, cement or asbestos-cement tile.
3. Where the existing roof has two or more applications of any type of roof covering.

When blisters exist in any roofing, unless blisters are cut or scraped open and nailed remaining materials secured down before applying additional roofing.

Exceptions:
1. Complete and separate roofing systems, such as standing-seam metal roof systems, that are designed to transmit the roof loads directly to the building’s structural system and that do not rely on existing roofs and roof coverings for support, shall not require the removal of existing roof coverings.
2. Metal panel, metal shingle, and concrete and clay tile roof coverings shall be permitted to be installed over existing wood shake roofs when applied in accordance with Section 1510.4.

(Note:  New Section needs to be added and renumbered)

	
1510.4 Roof recovering. Where the application of a new roof covering over wood shingle or shake roofs creates a combustible concealed space, the entire existing surface shall be covered with gypsum board, mineral fiber, glass fiber or other approved materials securely fastened in place.
		1510.4 Roof recovering. Where the application of a new roof covering over wood shingle or shake roofs creates a combustible concealed space, the entire existing surface shall be covered with gypsum board, mineral fiber, glass fiber or other approved materials securely fastened in place.			
1510.5 Reinstallation of materials. Existing slate, clay or cement tile shall be permitted for reinstallation, except that damaged, cracked or broken slate or tile shall not be reinstalled. Existing vent flashing, metal edgings, drain outlets, collars and metal counter flashings shall not be reinstalled where rusted, damaged or deteriorated. Aggregate surfacing materials shall not be reinstalled.		1510.5 Reinstallation of materials. Existing slate, clay or cement tile shall be permitted for reinstallation, except that damaged, cracked or broken slate or tile shall not be reinstalled. Existing vent flashing, metal edgings, drain outlets, collars and metal counter flashings shall not be reinstalled where rusted, damaged or deteriorated. Aggregate surfacing materials shall not be reinstalled.			
1510.6 Flashings. Flashings shall be reconstructed in accordance with approved manufacturer’s installation instructions.
Metal flashing to which bituminous materials are to be adhered shall be primed prior to installation.
		1510.6 Flashings. Flashings shall be reconstructed in accordance with approved manufacturer’s installation instructions. Metal flashing to which bituminous materials are to be adhered shall be primed prior to installation.			
HVHZ

	HVHZ

ss. 1512 through 1525.

Mods 637, 695, 688

	HVHZ

Add ss. 1512 through 1525 as new sections (see attached).	
	Mod 100  Chapter 35 Reference Standards

FRSA/NTRMA 07320/1-98    FRSA/RTI 07320/6-01, Concrete and Clay Roof Tile Installation Manual, 
Second Edition  Third Edition       1507.4.4
		
	Mod 210

Code:	Building					
Section #: 3502

This modification is a companion to one submitted for Section 1504.5 (Modification #202)

3502 REFERENCE STANDARDS. 
ASTM G 23-95 Light Exposure Apparatus (Carbon Arc type) with and without water for exposure of non-metallic materials 

ASTM G 26-95 Light Exposure Apparatus (Xenon arc type) with and without water for exposure of non-metallic materials

ASTM G 23-95 Light Exposure Apparatus (Fluorescent UV-Condensation type) for exposure of non-metallic materials

G152-00ae1 Standard Practice for Operating Open Flame Carbon Arc Light Apparatus for Exposure of Nonmetallic Materials
G153-00ae1 Standard Practice for Operating Enclosed Carbon Arc Light Apparatus for Exposure of Nonmetallic Materials 
G154-00ae1 Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials
G155-00ae1 Standard Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials