Should attic insulation extend into the eave soffits?

— Ralph Fumante Jr., Oyster Bay Cove, NY

Answered by Jesse Terzi on April 23, 2009

I am interested in solar PV. What do you recommend for an old house?

— Exton Quinn, Santa Monica, CA

Answered by Paul Rosen on July 17, 2008

What are the best financing options for building green in New York?

— Cecilia Dean, Brooklyn, NY

Answered by John Messerschmidt on May 10, 2007