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scrappy25

question about insulation between bay window and soffit

scrappy25
10 years ago

What do you recommend for insulation between the roof of a bay window and the overhanging soffit? There will only be about 4-5 inches of vertical space. I am thinking 2 inch foam board but does that/ should that be covered with sheathing, and if so, should that be PVC sheathing (rot free), or exterior plywood sheating? Will sheathing cause problems under the existing soffit if it butts up against it? There will be trim boards over the surface of the bay window reaching the soffits but I am asking about the unseen portion deep to the trim boards.

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