Insulating over cedar siding with 1-inch rigid foam underneath
Hi All, Just purchased a home in northern Michigan. Built in 1988 with 1″ of TUFF R(?) foam under vertically applied cedar 3″ T&G. After inspection there are 2×4 stud walls, 3 1/2″ fiberglass insulation,plywood sheathing, 1″ TUFF R foam, 5/4 cedar siding, and no drainage opening. I was trying to add insulation to the exterior. Thinking about ROXUL board directly over the cedar, furring strips, and different siding. Any thoughts on this plan.
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