What least toxic finishes do you recommend for flooring?

— Ali Lemaitre Reading, MA

Answered by Bill Bradbury on December 31, 2012

Do natural stone countertops give off dangerous toxins?

— Beth C Marietta, GA

Answered by Molly McCabe, AKBD, CGP, CAPS on December 19, 2012

Is radiant barrier sheathing worth using?

— Betty Wyse Saint Thomas, MO

Answered by Cynthia Phakos on December 19, 2012

What should I do with my A/C unit in the winter?

— Jon Chebeague Island, ME

Answered by Harold Remlinger, AIA, LEED AP, NCARB on December 18, 2012