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Window sill corner detail

Discussion in 'Windows and Doors' started by Roberto2019, 5 Jul 2021.

  1. Roberto2019

    Roberto2019

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    Does anybody have a diagram or drawing showing how the lower corner of a window sill is constructed, and how the DPC and cavity closers join/overlap to form a waterproof joint?

    I have recessed windows (i.e. they sit in the middle of the wall), and will be making a sub-sill from creasing tiles.

    I can't get my head around how this is supposed to work.... and no amount of YouTubing or Googling is clearing it up...!
     
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  3. Swwils

    Swwils

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    It depends on your construction, for instance some sill do not need dpc.

    LABC issue diagrams of accredited construction details that might help as a start for you.

    Also the cavity closer should have instructions that show how to form sill joints, some have you trim the sides to enable them to go down the cavity beyond the sill for a decent overlap.
     
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