Spray Foam Insulation

[David Henderson]

Does anyone have information on or experience with spray foam insulation in crawl space with combustible appliances and personal storage.

 

[Bama dav]

David, they should supply you with an ESR report. That report should spell out the the requirement of what would be allowed in the crawlspace. Most would be required to be covered by a thermal barrier.

 

[Jobsaver]

2006 IRC. Check Section R314 Foam Plastic, specifically R314.5.4 Crawl Spaces. Thermal barrier required to seperate personal storage areas in crawl space (treat as living space). Ignition barrier required to seperate balance of crawlspace from living space above, unless a thermal barrier is incorporated in the subfloor/flooring. Ignition barrier not required where the foam plasic insulation has been tested in accordance with Section R314.6. Get ES report or manufacturer's specifications off website. DO NOT TAKE THE INSULATING CONTRACTOR'S WORD FOR IT! Another good source of information for determining whether or not an ignition barrier is added to the base foam is to review the manufacturer's webite tutorials for applicators for the specific product used.

Thermal barrier and ignition barrier requirements do not hinge on the presence of combustible appliance location.

Also, thermal and ignition barrier requirements do not hinge on whether or not the foam is an open or closed cell product. There are still many foams out there that require the application of an ignition barrier.

 

[Sifu]

Assuming the spray foam is applied directly to the bottom of the decking, the ignition barrier would be the decking would it not? If it is on the walls we have a whole nother can of worms.