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Old 04-07-2008, 05:17 PM   #1
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Between insulation and foundation exterior walls


Just ripped apart old paneling from a basement room in order to install drywall. I pulled back the insulation and discovered just the concrete foundation. Should there not be something between the foundation and the insulation? Some kind of membrane on tarpaper?. I live in a fairly dry climate so humidity is not an issue in the basement. (Oroville, WA) Or is the tarpaper only installed to the outside of the concrete foundation walls?

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Old 04-07-2008, 07:07 PM   #2
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Between insulation and foundation exterior walls


you do not want anything between the livable air space and the exterior concrete that will trap moisture vapors. plastic or tar paper are not brathable materials and you will have mold

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Old 04-08-2008, 12:05 PM   #3
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Between insulation and foundation exterior walls


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Originally Posted by sithappens View Post
Should there not be something between the foundation and the insulation?
Did you find any problem that suggests that the installation wasn't adequate (mold, wet insulation, water stains, etc.) If not then I'd say the installation was ok.
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