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Home | Building Codes | Ignition Barriers and Thermal Barriers in Attics: International Residential Code (IRC) Requirements

Ignition Barriers and Thermal Barriers in Attics: International Residential Code (IRC) Requirements

The 2009 International Residential Code establishes prescriptive and alternative performance requirements for spray polyurethane foam (SPF) plastic insulation when installed in residential attic applications to ensure adequate performance of foam in a fire.

Meeting Code Requirements: There are two ways to meet the requirements for an ignition barrier or thermal barriers. The first way is the prescriptive requirements listed in the IRC and presented below. The second is based on performance testing of an assembly.

Link to Article: Ignition Barriers and Thermal Barriers in Attics: International Residential Code (IRC) Requirements

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