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Community and Q&A

Windows and Exterior Rigid Foam

cibula11 | Posted in Green Building Techniques on

I am installing new windows and cement board siding. We are adding an inch of foam board to the exterior. I know the siding can be nailed through the foam board into the sheathing by extending the length of the fastener, but can the same be said about nailing the window (flange) through the foam board? I realize that I have either that option or the option of building out my frame by an inch with OSB or ply so that I get a solid nailing surface. Is there a preference?

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Replies

  1. GBA Editor
    Martin Holladay | | #1

    Matt,
    Here is a link to an article that should answer all of your questions: Nailing Window Flanges Through Foam.

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