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IBC - GENERAL - ENERGY TAC

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Code Change No: G14-16 Part I

Original Proposal

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Section: IBC: 202

Proponent: Theresa Weston, representing DuPont Building Innovations (theresa.a.weston@dupont.com)

THIS IS A 4 PART CODE CHANGE. PART I WILL BE HEARD BY THE IBC-STRUCTURAL CODE COMMITTEE. PART II WILL BE HEARD BY THE IECC-COMMERCIAL CODE COMMITTEE. PART III WILL BE HEARD BY THE IECC-RESIDENTIAL CODE COMMITTEE. PART IV WILL BE HEARD BY THE IRC-BUILDING CODE COMMITTEE. SEE THE TENTATIVE HEARING ORDER FOR THESE COMMITTEES.

Revise as follows:

[BS] ROOF ASSEMBLY (For application to Chapter 15 only). A system designed to provide weather protection and resistance to design loads. loads. The system consists of a roof covering roof
covering and roof deck roof deck or a single component serving as both the roof covering and the roof deck roof deck. A roof assembly includes the roof deck roof deck, vapor retarder underlayment, substrate or and roof covering and can also include a thermal barrier, insulation or a vapor retarder, vapor
retarder and roof covering based on design specifications.

Reason: This proposal makes clarifies and makes corrections to the definition. Specifically, in the definition in the IBC and IRC it
replaces one of the redundant "vapor retarder" listings with "underlayment". Additionally it separates the items that are only present in some roof assemblies, from those that are present in all roof assemblies.

Cost Impact: Will not increase the cost of construction
This is a clarification of a definition and does add any additional restrictions or requirements.

Report of Committee Action Hearings

Committee Action:	Approved as Modified

Modify as follows:

[BS] ROOF ASSEMBLY (For application to Chapter 15 only). 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 can also include , an underlayment, and roof covering and can also include a thermal barrier, insulation or a vapor retarder, based on design specifications.

Committee Reason: The revision to the definition of "roof assembly" removes duplicative wording and clarifies which items are in all roof assemblies. The modification removes some of the proposed wording that was not needed and clarifies that underlayment can be included in the roof assembly but it not a requirement of all roof assemblies.

Assembly Action	None

Final Action Results

G14-16 Part I	AM

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