Carpet over gypcrete
 

I have a second floor in a multifamily building with 1.5 inch of
gypcrete over 3/4 OSB. Some parts will be carpeted.
Should there be a vapor barrier or some type of priming over the
gypcrete in order to install carpet over it?

Targus

Carpet over gypcrete
 

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I have a second floor in a multifamily building with 1.5 inch of
gypcrete over 3/4 OSB. Some parts will be carpeted.
Should there be a vapor barrier or some type of priming over the
gypcrete in order to install carpet over it?

No idea about code or current practice, but as a kid working on 3-high
apartments like that, we never did. The gypcrete wasn't in contact with
dirt, so once it was solid, no place to wick moisture from. I think the
'garden apartment' level, on slab, hade vapor barrier under the slab, IIRC.

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