Would batt or blown fiberglass insulation be the least toxic?

— Monica Mechanicsburg, PA

Answered by Andy Ault, CLC on November 2, 2010

Do you recommend bio-based soy foam insulation?

— Amy Alexandria, VA

Answered by Andy Ault, CLC on November 1, 2010

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