RE:
Roof Coating
1. Current
status:
2010 Florida Building Code
2010 Florida Building Code, Building
– Chapter 15
1507.15.3 Roof Coating. Add to read as follows (Non – HVHZ) :
1507.15.3 Roof Coating. Application of elastomeric and or maintenance coating systems over existing asphalt shingles shall be in accordance with the shingle manufacturer’s approved installation instructions. {3814}
HVHZ
1521.17.1 Application of elastomeric and or
maintenance coating systems over existing asphalt shingles shall be in
accordance with the shingle manufacturer’s approved installation instructions. {3799}
1521.18.1 No PUF and/or elastomeric coating systems shall be applied over existing composition shingles.
2010 Florida Building
Code, Residential
(Non – HVHZ).
R905.15.3 Application. Liquid-applied roof coatings shall be
installed according to this chapter and the manufacturer’s installation
instructions. The approved allowable uplift resistance for the
liquid-applied coatings shall be equal to or greater than the uplift resistance
for the roof based on Table R301.2(2).
HVHZ
R4402.10.17.1 Application of elastomeric and
or maintenance coating systems over existing asphalt shingles shall be in
accordance with the shingle manufacturer’s approved installation instructions.
(3800)
R4402.10.18.1 No sprayed polyurethane foam (PUF) and/or elastomeric coating systems shall be applied over existing composition shingles.
______________________________________________________________________________
2. Compromise
Language – Lower Cost regulatory Alternative:
1507.15.3. Roof Coating, Adhesives and Mastics. Only elastomeric and/or other roof
maintenance coating systems which meet the material standards set forth in this
code and receive a product approval from the state authority having
jurisdiction shall be entitled to be applied to new and existing asphalt or
other composition shingles.
1517.17.1 Roof Coating, Adhesives and Mastics. Only elastomeric and/or other roof coating
systems which meet the material standards set forth in this code and receive a
product approval from the Miami-Dade County shall be entitled to be applied to
new and existing asphalt or other composition shingles.
1521.18.1 No PUF and/or elastomeric coating systems shall
be applied over existing composition shingles.
4402.10.17.1 Roof Coating, Adhesives and Mastics. Only elastomeric and/or other roof coating
systems which meet the material standards set forth in this code and receive a
product approval from the Miami-Dade County shall be entitled to be applied to
new and existing asphalt or other composition shingles.
1521.18.1 No PUF and/or elastomeric coating systems shall
be applied over existing composition shingles.
3. Staff proposal as
an alternative and as starting for the discussion:
1507.15.3 Roof
Coating. Application
of elastomeric and or maintenance coating systems over existing asphalt
shingles roof coverings shall be
in accordance with the shingle roof coating manufacturer’s
approved installation instructions as demonstrated through testing to a
specific roof substrate.
Note:
we advise that this provision be moved to the Florida Building Code, Existing
Building and the applicable Reroofing sections of the FBC.