Dormer Side Cheek Windows

15 Feb 2021
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United Kingdom
I am planning on fitting side cheek windows to my dormer windows to give me a triple aspect. The lower part of the cheek window frame will be angled to follow the roof line and sit about 100-150mm proud of the sarking. See attached file.

Can anyone share the lead/roofwork schematic and description for the fitting of this type window? (I have heard you need to build a lead box section).

Can it work without a cill?



  • Dormer Cheek Windows.pdf
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