Rigid foam insulation over concrete in basement
I am finishing a basement with poured concrete walls. There is no insulation over the concrete on the exterior. On the inside, I would like to install 1″ rigid foam and cover with 2×4 framing with batts of Roxul between studs. What type and finish of rigid foam would be best — Polyisio, EPS, XPS, or other? I can think of reasons for using each of these but wonder which solution keeps moisture vapor issues to a minimum?
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