Rim joist with exterior EPS
My home has 1″ of EPS on the exterior walls and covering the rim joist. The rim joists are uninsulated on the inside. If there was no exterior rigid I’d use a combo of rigid foam board and batts on this inside, but because of the exterior insulation, I’m concerned about creating a vapour sandwich.
Is the best approach here to air seal from the inside with caulk or canned foam, then add FG or roxul batts to allow inward drying?
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