What is the difference between a vapor barrier and a vapor retarder in flooring applications?
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A
There is no difference; the terms are interchangeable
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B
A vapor barrier has a perm rating of 0.1 or less; a vapor retarder has a higher perm rating but still limits transmission
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C
A vapor barrier is installed under the slab; a vapor retarder is installed on top
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D
A vapor retarder is a liquid-applied product; a vapor barrier is always a sheet product