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Old 10-16-2011, 08:19 PM   #1
A Little Of Everything
 
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Vapor Barrier Question (Another One)


Sorry for yet another vapor barrier thread. I've done the search & gotten all manner of differing opinions, none of which really address what I'm doing. Anyway...

Tomorrow I'm going to begin studding in & drywalling two walls of a family room/office in a rental house (third wall is already drywalled). I'll be using 2x4 studs & R11 fiberglass bats.

Both walls are concrete block. One wall is an exterior wall, and the other wall is the garage wall.

Conventional wisdom seems to say always put vapor barrier on the "warm side" of the insulation, and I'm tentatively planning to do that, but I'd like to clarify a couple things.

- Would you treat the unheated garage wall the same as an exterior wall, and install the vapor barrier between the studs & drywall?

- Is there any reason to "double install" the vapor barrier, installing a layer against the blocks, then another immediately behind the drywall?


Thanks for your thoughts!

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Old 10-16-2011, 08:34 PM   #2
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Vapor Barrier Question (Another One)


No. Do not double vapor barrier.

Where is the home? The necessity of supplemental vapor barrier may be nil depending on the location. If you are in Omaha, painted drywall that is properly sealed is all the vapor barrier you need.

Treat the garage wall as an outside wall.

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Old 10-16-2011, 09:46 PM   #3
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Vapor Barrier Question (Another One)


Quote:
Originally Posted by Windows on Wash View Post
No. Do not double vapor barrier.

Where is the home? The necessity of supplemental vapor barrier may be nil depending on the location. If you are in Omaha, painted drywall that is properly sealed is all the vapor barrier you need.

Treat the garage wall as an outside wall.
Thanks - that's what I tentatively planned to do.


And yes, the house is here in Omaha.
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