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Had a few insulation companies come in and they suggest foaming over my vents. They said ventilation in attics is a thing of the past.

— Michele Garden City, NY

Answered by David Willson on October 21, 2011

I am thinking of supplementing the fiberglass insulation in my attic.

— Jerry H. Hopkins, SC

Answered by Michael Holcomb on September 22, 2011

Architect spec'd 6" of open cell foam in rafter cavities directly below roof. At what thickness does OC foam become enough?

— Paul McTrim Hilton Head Island, SC

Answered by Jason Kliwinski on April 4, 2011

Which is best for an attic: closed or open cell spray foam?

— Karen Zebulon, NC

Answered by Matthew McCullough on February 22, 2011

Closed or open cell foam in our to-be-finished attic in Maine? And what kind of venting is necessary?

— BHNelson Westbrook, ME

Answered by Matthew McCullough on February 22, 2011

I need to insulate my attic in South Carolina. The house was built in 1984 and remodeled in 2004.

— John Mosher Hilton Head Island, SC

Answered by Matthew McCullough on February 22, 2011

Which one is better in the attic: cellulose or rigid foam board?

— Felix Laredo, TX

Answered by Randy Potter on January 27, 2011

I have a 1946 Cape Cod in Indiana with an unvented attic. I want to insulate the house with foam. Should I use open or closed cell foam?

— David Mills Indianapolis, IN

Answered by Kevin Holdridge on December 20, 2010

I am putting spray foam insulation in my attic. What is the better option: open or closed cell?

— Gil Morelle Alpharetta, GA

Answered by Polly Osborne, FAIA, LEED AP on December 16, 2010

I have a 1923 home and want to install insulation in the attic, but there are no soffit vents. How can I retrofit them into my home?

— Tim Saint Paul, MN

Answered by Danny Kelly on December 4, 2010

 
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