d079b06a_on___Green_Home_Guide_by_USGBC__Application_Tips
[Material] Spray Polyurethane Foam (SPF) Insulation [Pros] * No HCFCs * Prevents air leakage * Doesn’t settle * Low density SPF bio-based products are available, which use up to 33% soy oil [Cons] * Not recyclable * Most SPF products are made primarily from petrochemicals [Application Tips] 
Spray foam is appropriate for small to large remodels in areas with moderate moisture. Good for wall cavities and attics. Sprayed through small holes in walls.
Buyer’s Guide to Green Insulation - Green Home Guide by USGBC
Application Tips