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Old 04-08-2012, 08:02 AM   #1
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Spray foam!


I am wondering if spray foam can act as an insulation and vapor barrier on a cement foundation basement wall...any advice...

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Old 04-08-2012, 08:34 AM   #2
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Spray foam!


i believe it can. but wait around for someone who knows for sure.

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Old 04-08-2012, 11:41 AM   #3
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Spray foam!


theres rated spray foams that act as a insulation and a vapour barrier. if you are using a can like great stuff it is not a rated vapour barrier spray foam.
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Old 04-08-2012, 12:31 PM   #4
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Spray foam!


both open and closed cell are insulators. open cell is much more vapor open, and is usually painted w/ a vapor retarder paint if a vapor retarder is needed.
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Old 04-09-2012, 06:57 AM   #5
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Spray foam!


Depending on applied thickness and foam type, yes.

Closed cell, as jklingel said, is not vapor open and at sufficient applied depths, does qualify as a vapor barrier.

You don't really need to thick of a vapor barrier on concrete as much as you need to thick of condensation resistance and an air barrier.
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