the foam board has a metallic reflective coating/layer that is and should be facing to the outside, the foam board I have installed is on the interior of the masonry block much the same way the rest of the house was done, if moisture get through that I will have bigger problems, but I understand the concern, the new construction has sleepers between the foam board insulation and the drywall that gives an air space between the two, I have wondered about filing that space with insulating pellets ???
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