I am looking at installing both an outswing and inswing high R foam core exterior door in the same RO. As my exterior walls with be 9" deep I should be able to do it even if I have to trim one frame down and cover seam with mullion trim. Double the R and double air seal for a lot less than $12,000. It just shocks me how such expense for energy saving products could ever payback. I would like the outer door to have vinyl or fiberglass frame though to outlast standard wood ones.
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