How can I control moss growing on my roof?

— John Duke Richmond, VA

Answered by Erik Henry on September 11, 2012

Is an asphalt shingle roof or concrete tile better, energy wise?

— ryan dyck Moorpark, CA

Answered by Michael Holcomb on August 20, 2012

What is the best way to insulate a new roof from the exterior?

— Melanie Skelton Niota, TN

Answered by Danny Kelly on July 23, 2012