Rigid Foam Insulation for Walls and Roof
I have been playing around with a few ideas to adequately insulate my Cape Cod style home. I’m wondering if there’s an issue with having 1” polyiso on the interior of the walls (dense blown cellulose underneath), and polyiso and EPS above the sheathing for the roof (with cellulose batts between rafters)? I’ve read through as many of the pertinent articles as I could find and know both are doable independently, but haven’t seen anything about them used together. I just want to make sure there’s no issue with the walls drying to the exterior but the roof to the interior.
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