Can spray on insulation be safely applied as a retrofit to an occupied home?

— Don Keith Fairbanks, AK

Answered by Bill Bradbury on January 31, 2012

Do acrylic bath tubs leach chemicals when you take a bath?

— Emilie Pittsburgh, PA

Answered by Bill Bradbury on January 31, 2012

What is the best green insulation to use in our crawl space?

— L. Stephenson Palos Verdes Peninsula, CA

Answered by Bill Bradbury on January 31, 2012

How do I design garden irrigation? What software can I use for it?

— Mochen Nassau, NY

Answered by Cassy Aoyagi on January 27, 2012

How can I permanently remove mildew in my very small shower?

— Ana Maull San Antonio, TX

Answered by Mark Daniels on January 27, 2012

What do I do if I think my linoleum might have asbestos?

— maureen gaines Lexington, MA

Answered by Olga G. Alvarez, LEED-AP ID+C on January 26, 2012