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Windows with no shims?

mordors_eye | Posted in General Questions on

Amateur theoretical question here. 

If I had windows on site while framing was being done, would it be good to frame the King and Jack studs right against the (vinyl, wood, aluminum, etc.) window frame in lieu of incorporating a 3/8ths inch gap for shim and spray foam?  Assuming rough opening is square.  Is the gap necessary or just easy to work with the get windows level?

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Replies

  1. insaneirish | | #1

    > If I had windows on site while framing was being done, would it be good to frame the King and Jack studs right against the (vinyl, wood, aluminum, etc.) window frame in lieu of incorporating a 3/8ths inch gap for shim and spray foam?

    No!

    Framing moves. Windows frames aren't always perfect. Waterproofing layers consume space. A gap is your friend.

    1. Expert Member
      MALCOLM TAYLOR | | #2

      mordors_eye,

      No tight, but close. I try and minimize the gap, trying for an even 3/16". It seems to me that a lot of why gaps need so much attention is because they were created in the first place.

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