Help with bow window/canopy roof

Discussion in 'Builders' Talk' started by Ikneweskimo, Sep 25, 2021.

  1. Ikneweskimo

    Ikneweskimo New Member


    I think I may have gotten myself in a bit of a mess. Yesterday I changed the Bow window in the living room of a house I've just bought. There's a canopy roof above it that goes over the porch and then across the house. The roof looks like it's coming away from the wall on one side where the gallows bracket is rotten, but hasn't moved since I have owned the house so it's on my to do list.

    I wanted to change the window as there's white ship lap on the ceiling in the bay in the living room, and I want to board and skim that before work starts on the living room itself.

    However after I took the old window out I've noticed that the shiplap runs right through to the outside of the canopy roof. (I thought the inside and outside of the house would be separated somehow and I could just remove the timber inside and board it, then address the roof at a seperate time)

    I'm a bit stuck now, as the window had to go in because I had already taken the old one out, but I had to leave the shiplap up because there wouldn't have been anything above the window had I taken it all down before installing it... so I have a few questions

    1. Should there be something above the window in the canopy roof that blocks inside from outside, and if so, what?

    2. What should I put above the window, should I insulate it, membrane and then plastboard it?

    3. Is there a way I could jack the roof up on the corner rhats dropped, renew the gallows bracket and fix the top of the roof back to the wall where I assume it's come away?
    Ideally I would prefer not to take the whole thing down, and I'd prefer not do anything that will mess up the inside of the house above the bay if I board and skim it.

    I have attached some.pictutes were you cab see the shiplap, the lack of any separation in the canopy roof but it won't let me upload pictures of the roof itself as it says they're too large ‍♂️

    Sorry for the long post, I would appreciate any advice!

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  2. Wayners

    Wayners Screwfix Select

    Put 25-50mm of Kings pan insulation in the bay with polymer mastic to seal the edges to make air tight then plasterboard over with foil backed board.

    Most are just rammed with rock wool then standard plasterboarded over which allows moisture to penatrate through but not how I'd do my own, and take a chance as I think it will be fine based on watching the skillbulder cold vs warm roof video on youtube.
    I'm always keen to put timber above windows to fix to thus stopping the frame sag although if you pack glass at the top this will stop that.

    That's all I can say and not sure about your other problems. Can make props easy enough with T bar smacked in.
  3. Jord86

    Jord86 Screwfix Select

    1. Tiles and felt/membrane do a fine job.
    2. Yes.
    3. If not much weight to the roof bang a length of 4x2 under the dropped corner with a lump or sledgehammer and drive it vertical until the roof is in the correct place, if heavy then Acrow prop it up slowly, bolt the roof to the wall, fit new gallows bracket, remove acrow.

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