Green vapor barrier Questions

My daughter has an older home with what I call "rock wool" insulation in the ceiling and walls. How to better insulate?

— Kenneth Kempf Hillsdale, IL

Danny Kelly

Answered by Danny Kelly

Charlotte, NC

Kelly McArdle Construction

August 30, 2010

What is the least toxic subflooring or vapor barrier to keep roofing fumes out of the house?

— Dee Larosh Overland Park, KS

Answered by Martin Grohman on February 10, 2011

Is there a technical problem if I install insulation with vapor barrier on both sides?

— Felix Laredo, TX

Answered by Danny Kelly on January 7, 2011

My daughter has an older home with what I call "rock wool" insulation in the ceiling and walls. How to better insulate?

— Kenneth Kempf Hillsdale, IL

Answered by Danny Kelly on August 30, 2010

What kind of waterproofing can you use in crawlspaces to help with going green?

— Michael Deal Charlotte, NC

Answered by Danny Kelly on August 30, 2010

We have a 1952 Cape-style house in MA and are considering vinyl clapboards instead of cedar shingles. Is Mastic by Ply Gem the best brand?

— Mark Whitney Mattapoisett, MA

Answered by Rick Goyette on May 16, 2010

In a Passive House wall assembly, is the vapor barrier on the inside or outside?

— Mark Hoyt Olympia, WA

Answered by Tessa Smith on May 13, 2010

In an arid climate, should we place the (plastic) vapor barrier inside the frame rather than Tyvek at the exterior?

— KC Boise, ID

Answered by Florian Speier on March 28, 2010

I'm converting my attic into a non-vented conditioned space. Should I use open cell or closed cell foam to insulate?

— Gary Lichtenstein

Answered by Steve Saunders on January 15, 2010

Should I leave an air space between my attic insulation and the wood roofing?

— D.L. Bennett, Arlington, VA

Answered by Mike Binder on March 5, 2009

Is there a greener alternative to polyethylene housewrap?

— Oresta Korbutiak, Ottawa, ON, Canada

Answered by Mitch Boucher on August 7, 2007

 

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