Is there formaldehyde in roofing materials?

— annette littman Bethany, CT

Answered by Sean Lintow Sr on April 1, 2013

We have a black dust problem with the ducts in several rooms.

— Jan Jackson, NJ

Answered by Sean Lintow Sr on March 14, 2013

How long do wood sealers emit VOCs after drying?

— Elizabeth Sacramento, CA

Answered by Joel Hirshberg on January 28, 2013