Spray Foam & Code Requirements for Commercial Building Designs
Commercial building designs that include spray foam insulation should take into consideration the following:
Spray Foam Code
- Local codes based on IBC 2009: Chapter 26
- Local codes based on IBC 2012: Chapter 26
- Local codes based on IBC 2015: Chapter 26
Building Thermal Envelope Code
- Local codes based on IECC 2009: Section 502
- Local codes based on IECC 2012: Section C402
- Local codes based on IECC 2015: Section C402
There may also be codes related to the specific application in which Icynene can work with your firm to address the building code requirements. To determine which code your local code is based on, you can visit the Online Code Environment & Advocacy Network website.
Thermal Barrier and Vapor Barrier Requirements
In an occupied space, a thermal barrier adjacent to either low density or medium density foam is required. This could be ½ inch gypsum board, or from the code prescribed list in 2603.4, depending on the spray foam section of the local code. If the space is unoccupied, a thermal barrier is not required. Icynene’s Engineering and Building Science experts are able to work with you on your commercial building design to determine the requirements for a thermal barrier.
In terms of a vapor barrier, local code will indicate the requirements as it is affected by climate and the elements in the building envelope.