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Old 12-19-2011, 08:08 PM   #1
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Insulating basement walls


I am looking to finish my basement and was told to apply visqueen directly to the wall, and then cover with 2 inch foam board. Everything I read states to use the foam board but says nothing about using visqueen. My question is will the foam board be a good enough vapor barrier on the wall or should I use both visqueen and the foam? I am also concerned that visqueen will create mold, should I be?

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Old 12-19-2011, 08:14 PM   #2
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Insulating basement walls


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Originally Posted by Ntucker View Post
I am looking to finish my basement and was told to apply visqueen directly to the wall, and then cover with 2 inch foam board. Everything I read states to use the foam board but says nothing about using visqueen. My question is will the foam board be a good enough vapor barrier on the wall or should I use both visqueen and the foam? I am also concerned that visqueen will create mold, should I be?
Read the past posts within this forum. I personally have seen/typed the answer to this question multiple times...

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Old 12-20-2011, 08:07 AM   #3
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Insulating basement walls


+1

The vapor barrier (i.e. permanence) depends on the type of foam used, but it absolutely can serve both as an insulator and the vapor barrier.
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