Is it okay to spray open-cell foam over a layer of closed-cell foam?

— Steven L'Heureux Richmond, VA

Answered by Danny Kelly on August 30, 2010

Would you recommend foam insulation for a tight attic space?

— Ronnie West Hempstead, NY

Answered by Danny Kelly - KMC Green Team on July 16, 2010

Is three inches of batt insulation enough for my attic?

— Martin Bennett Bowie, MD

Answered by Steve Saunders on July 1, 2010