Can plaster walls be recycled? I am going to gut re-hab a home.

— Barbara Donahue Sandy Hook, CT

Answered by Kati Curtis, LEED AP ID&C, CID on August 22, 2011

How do I protect the outdoor elements of my air conditioner?

— corrie neal Knoxville, TN

Answered by Michael Holcomb on June 17, 2011

Can someone tell me more about a product called DragonBoard? Should I use it?

— Frank O'Reilly San Francisco, CA

Answered by Rick Goyette on June 14, 2011