In a mixed Midwest climate, is foam board insulation under siding a bad thing?
I was talking to a contractor in my area about my siding options and I asked him if when re-siding my house I could add an inch of foam board insulation under the siding. My walls can get pretty cold in the winter months, after all.
He told me that it would be a BAD move and that my house would rot from the inside out due to condensation and moisture building up.
Now I already have some blown-in insulation in the walls, but I don’t think I have enough because my walls get pretty cold. I know that my house need to be able to “dry out” but what options would I have to improve the comfort of the house (cold walls) if I can’t put up foam boards?
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