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Old 05-04-2012, 10:01 AM   #16
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PVA Primer as a vapor barrier


You should never try and rely on paint for a vapor barrier. If you get a crack in a corner or along the floor line or ceiling, bye bye vapor barrier.

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Old 05-04-2012, 05:41 PM   #17
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PVA Primer as a vapor barrier


I think the HO actually had no idea what they were asking for, or why.
And Nail hasn't been back to clarify.
And the county has it wrong. But that's gov't work for ya.
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Old 05-05-2012, 04:02 PM   #18
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PVA Primer as a vapor barrier


WA State has own Energy Code. Walls require interior (warm side) vapor retarder or X" exterior foamboard. Sounds like the OP didn't use the paper-faced insulation and needed/found an acceptable replacement- post #13.

Vapor barriers (area weighed) can have holes, air barriers cannot; http://www.greenbuildingadvisor.com/...cience-podcast

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Old 05-05-2012, 07:55 PM   #19
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PVA Primer as a vapor barrier


Quote:
Originally Posted by GBR in WA View Post
WA State has own Energy Code. Walls require interior (warm side) vapor retarder or X" exterior foamboard. Sounds like the OP didn't use the paper-faced insulation and needed/found an acceptable replacement- post #13.

Vapor barriers (area weighed) can have holes, air barriers cannot; http://www.greenbuildingadvisor.com/...cience-podcast

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The home owner did their own insulation. And as such I asked him about it but he told me the inspector said to use PVA primer on the dry wall and all would be good. That is Code for Washington state. two coats
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Old 05-06-2012, 12:12 AM   #20
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PVA Primer as a vapor barrier


LOL, I was answering post #17 and 16, stating to read your post number 13...... Sorry, I should have said the OP's homeowner needed a vapor retarder as is stated in #13.
Sounds as if you are a neighbor of mine, you'll like these, Nailbags;

http://www.energy.wsu.edu/Documents/...ers%201-10.pdf

https://docs.google.com/viewer?a=v&q...B0OzT5oKmAygdg

http://www.dsireusa.org/incentives/i...srp=1&state=WA

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Old 05-07-2012, 07:47 AM   #21
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PVA Primer as a vapor barrier


A vapor barrier primer is classified as a primer with a perm rating of under 1.0. This prevents moisture or water vapor from interior rooms from penetrating walls into the rafters (which forms mold). Glidden Professional 1060-1200 is one of these primers, and it is a polymer/acrylic blend. It has a perm rating of .6.

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