[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.