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Guidance on Flammability Code Requirements for Polyurethane Foam Used as Interior Finish or Trim 

Polyurethane foam can be used in buildings as an interior wall or ceiling finish or trim but only after the product has been shown to meet relevant building code requirements and has been approved by the Authority Having Jurisdiction (AHJ) - typically the local building code inspector. 

Generally, a code-prescribed thermal barrier (1/2-inch thickness gypsum wall board or equivalent) is required (2012 IBC, Sec. 2603.4) over installed polyurethane foam, but, at times, it may be more practical to install another type of barrier, or in certain circumstances, no barrier. In such a situation, the model building codes have provisions that allow, via large scale fire tests, the demonstration of acceptable performance of assemblies without the prescriptive thermal barrier, as described in 2012 IBC, Sec. 2603.10. This guidance document addresses some of the model building code flammability requirements when using polyurethane foam as an interior finish or trim. It does not address all of the model building code requirements.

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American Chemistry Council

The American Chemistry Council’s mission is to advocate for the people, policy, and products of chemistry that make the United States the global leader in innovation and manufacturing. To achieve this, we: Champion science-based policy solutions across all levels of government; Drive continuous performance improvement to protect employees and communities through Responsible Care®; Foster the development of sustainability practices throughout ACC member companies; and Communicate authentically with communities about challenges and solutions for a safer, healthier and more sustainable way of life. Our vision is a world made better by chemistry, where people live happier, healthier, and more prosperous lives, safely and sustainably—for generations to come.