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Old 10-23-2008, 08:45 PM   #1
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Sealing a vapour barrier in garage


I'm trying to figure out how I seal the vapour barrier along the ceiling in my garage. i used acousti seal along the bottom, but the ceiling is already drywalled and there is no wood visible to seal the barrier to. Any ideas anyone?

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Old 10-24-2008, 07:54 AM   #2
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Sealing a vapour barrier in garage


not sure I understand....if the ceiling is drywalled...why do you need to seal the vapor barrier? I assume you're looking at this from the attic side?

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Old 10-24-2008, 08:31 AM   #3
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Sealing a vapour barrier in garage


I live in a town home and i am a middle unit, I have a double car garage and it is full dry walled. however the Kitchen is right above the garage and in one spot there is a really cold spot.

I wanted to do the same thing.... and i still might, but a neighbor had the same problem, and was told it wasn't cause of the lack of insulation in there. It was because of the AC. The unit that goes outside(on my deck off the kitchen) needs a path to get the the basement or something and that was were the cold was getting in. just thought i might share that with you...

but i too would like to know the best way to insulate up in there, see as though its finished off now.
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Old 10-24-2008, 11:22 AM   #4
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Sealing a vapour barrier in garage


The vapor barrier should be on the warm side of the insulation.

If you have sheetrock/drywall/softwall there may be something there and you should not be concerned with the seal of a "vapor barrier" (actually a vapor retarder) without being able to get to it.

If you create a second vapor barrier, you are creating a bigger problem.
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Old 10-25-2008, 08:51 AM   #5
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Sealing a vapour barrier in garage


I never heard of a 'vapor barrier' in regard to garage ceilings.
What purpose are you trying to achieve by applying a vapor barrier to a ceiling ?
There is such a thing as having a room or home (or garage for that matter) too tight.
Just like you and I, a building must be able to 'breathe' a little.
Too little vapor barrier and insulation, you lose too much heat and cooling ability.
Too tight and you run the risk of eventual water problems such as ruining your insulation, warping your drywall, etc.
The problem is finding the right balance.

Finding that right combination should be fairly easy to do these days. Simply visit a weatherization website, find out which 'zone' you live in, and insulate to that standard.
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