What to do about condensation on slab along outside walls?
I am building a house with a monolithic slab (frost protected) in a cold environment (Alaska). The house has a walk out basement. I have 3.5″ of foam under the slab, but not under the footing portion of the slab. The outside of the slab/footing is insulated with 2″ foam and there is 2′ of 2″ foam applied horizontally around the perimeter of the slab, 4′ on the corners. I was advised not to put foam under the footing part of the slab (now I believe ill advised). In the summer when warm air enters the building condensation immediatly forms close to the walls on the slab mostly on the back wall side that is backfilled about 7′. I know what causes the condensation (concrete footing in contact with cold ground meeting warm summer air). Is there a solution for this problem? The walls are ICF, additionally, what would be the best wall covering/trim down by the floor where it may get damp from the condensation? The foam ICF does soak up moisture from the condensation.
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