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Fitting dormer windows, keeping external reveals weatherproof

Discussion in 'Windows and Doors' started by Tim0392, 8 Apr 2019.

  1. Tim0392


    8 Apr 2019
    Thanks Received:
    United Kingdom
    Hi Folks,

    I have a question on how to install aluminum windows into wooden dormer framework. My current plan is to slate (Marley ones) the front of the dormers, but I’m wondering how best to keep the external reveals of the windows weather tight?

    Here’s an approximate model of the window sitting in the dormer framing, showing the vertical slates.

    From what I’ve researched so far I would need to fit a window tray, something like this example:
    and do something like the overlapping soakers up the side as he has in that video.

    Presumably, the window frame would sit within the lead work, with the lead work turned back on to the front of the window frame? So I'd need to factor that into the window size.

    Are there any other options or am I on the right track?

    I will be using k-rend on other parts of the house. I did wonder if I could use a window tray, but render the external reveals, from the window frame to the run of slates using that? As you can probably tell, I’ve not done this before, and I’m not a builder. What could possibly go wrong? :)

    Any advice or suggestions would be greatly appreciated!

  2. DIYnot Local

    DIYnot Local

    3 Sep 2019
    United Kingdom

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