We are removing old siding from a house, and replacing it with Hardie lap siding. We are leaving the original wood-framed picture window in place. With the siding removed there are gaps between the window jamb and the sheathing. Should we use caulk or peel-and-stick, or both, as an extra precaution against potential water damage, before we apply the house wrap?

  • Maybe non-expanding foam. Do NOT use epxanding foam, it could warp the frames. Commented Jan 22, 2020 at 5:25

1 Answer 1


I'd be sanding them and caulking them before applying the house wrap.

  • The gaps are between the jamb and the sheathing ~ does this need to be wrapped with peel-and-stick in addition to the caulk, because some of the gaps are approximately 1/3 inch wide?
    – RET
    Commented Aug 24, 2019 at 21:45

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