Green energy efficient window Questions

What is Climatech glass, and is .30u very efficient?

— Phil Engers Monkton, MD

Answered by MICHAEL BOWERS on May 2, 2011

We are adding a dormer on our home. What energy improvements can we consider?

— Emily Huntington Station, NY

Answered by Sergio Grado on February 22, 2011

Can you recommend suppliers of low U-value solid wood windows?

— Jessie Turnbull Brooklyn, NY

Answered by Florian Speier on February 4, 2011