Crawl Space Fire Safety NC SC — Building Code Requirements for Foam Insulation, Vapour Barriers, and Combustion Appliances
⚡ QUICK ANSWER NC R409 and SC building codes both require that foam plastic insulation in crawl spaces be covered with a thermal barrier — typically 1/2-inch gypsum board — unless the foam has been specifically tested and approved for exposed application. Vapour barriers must meet flame spread and smoke development requirements. Unprotected spray foam…