MyFloridaCode.com

An interior vapor retarder is not required in ICC climate zones 4 or lower.

I am curious as to what research you have done regarding a vapor 
barrier over open cell foam?


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>Can someone give me the code reference for interior vapor barrier 
>requirements over insulation.  I'm specifically trying to find the 
>requirement (if any) for a vapor barrier over open cell foam.  The 
>research I've done seems to indicate the need for a vapor barrier 
>over open cell but there seem to be a few other opinions out there 
>as well with regards to our part of the country.  Just wondering if 
>the code addresses this specific situation.  I'm sure this question 
>will also spark a good foam vs. anti-foam debate so I look forward 
>to learning from that as well.
>
>Thanks
>
>Ken
>
>
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