Test what you know about spray foam before you hire.
Q1. Which foam creates a moisture and vapor barrier for basements?
Closed-cell foam. It is rigid, dense, and forms a Class 1 vapor barrier — the right choice for below-grade spaces and outbuildings.
Q2. Why does spray foam prevent ice dams?
Ice dams form when warm air escapes into the attic and melts snow unevenly. Spray foam provides complete air sealing, keeping the roof cold and snow melting evenly.
Q3. What R-values can spray foam achieve in an attic?
R-21 to R-49, depending on thickness and foam type — plus a true air seal that fiberglass cannot provide.
Q4. Which foam is best for soundproofing interior walls?
Open-cell foam. Its porous, sponge-like matrix absorbs airborne sound and dampens noise between rooms.