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#1
12-15-2007, 10:45 PM
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Rigid Foam Insulation Question
I am using rigid polystyrene foam insulation by Owens Corning for a project. This is the stuff you buy in 4x8 sheets, in whatever thickness suits your needs. I read on their website that the foam has a good deal of moisture resistance. Will I still need to use an 8mil plastic vapor barrier on the heated side of the wall, as I would if using unfaced fiberglass batts? I'm hoping not, but want to make sure.
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