Is an attic fan a good investment or a waste of money?

— Mary Savage, MD

Answered by Polly Osborne, FAIA, LEED AP on October 29, 2012

I'm looking for the safest hardwood floor for a baby nursery. Solid wood?

— kelly Boca Raton, FL

Answered by Cynthia Phakos on October 23, 2012

Should I add fiberglass or cellulose to my attic insulation?

— Marsha Broomfield, CO

Answered by Edward Wright on October 19, 2012

What is the best fertilizer this time of year for Denver, CO weather?

— William Owen Brighton, CO

Answered by Richard Heller on October 19, 2012

What is best central heating system for a 1920s bungalow?

— Edward Memphis, TN

Answered by Elizabeth DiSalvo on October 19, 2012