I agree a vapor barrier should not be used at all in a basement and concur that XPS is the best insulation material to use.
My question is a bit different - if I am going to put up a 2x4 studded wall with unfaced insullation batts against a concrete wall would there be a benefit to first gluing up some of the fan fold insullation that is only 1/4" thick against the wall and then mount the stud wall over it with the unfaced foam insullation between the studs.
The purpose would be to keep the insullation from touching the colder concrete to prevent condensation.
Second would there be any need to even glue the fan fold in place - couldn't I just support it in place with the 2x4 wall. |
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