Vapor Barrier Question
 
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Old 01-29-2006, 04:43 PM   #1
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Vapor Barrier Question

Before I boarded the bathroom I gutted, I used unfaced fiberglass batt insulation in the exterior wall and ceiling (unheated attic above). I read that it's a bad idea to use insulation with a vapor barrier with moisture-resistant drywall, since moisture could condensate behind the drywall.

I've read that certain primers can act as a vapor barrier, but I don't know much about these products. Are they oil-based or water-based? Any product recommendations? Do I need to prime before using a vapor barrier product?

-Ken the Plumber

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Old 01-30-2006, 10:16 PM   #2
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Re: Vapor Barrier Question

I don't have a clue but I'm sure someone does
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Old 01-30-2006, 10:48 PM   #3
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Re: Vapor Barrier Question

Quote:
Originally Posted by Lone Wrencher
Before I boarded the bathroom I gutted, I used unfaced fiberglass batt insulation in the exterior wall and ceiling (unheated attic above). I read that it's a bad idea to use insulation with a vapor barrier with moisture-resistant drywall, since moisture could condensate behind the drywall.

I've read that certain primers can act as a vapor barrier, but I don't know much about these products. Are they oil-based or water-based? Any product recommendations? Do I need to prime before using a vapor barrier product?

-Ken the Plumber
What is climate like where you live???
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