How to Build an Eyebrow Dormer

Written by ehow home & garden editor
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An eyebrow dormer can add drama as well as headroom to your attic. It requires extra work, thanks to the curve of the dormer, and a custom window.

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Instructions

  1. 1

    Decide on the window you wish to use for your eyebrow dormer. The curve of this window will decide the shape when you build an eyebrow dormer.

  2. 2

    Begin framing the eyebrow dormer by creating to "support structures" for the ceiling and the roof.

  3. 3

    Create a curved header when you build an eyebrow dormer by gluing and screwing four layers of ¾ plywood together. Because this plywood is easy to bend, you can shape it into the curve you need.

  4. 4

    Sheath the outside of the eyebrow dormer you are building with two layers of plywood that is 3/8 and allow the back of it to die into the main roof.

  5. 5

    Install a waterproof membrane on top of the plywood, then finish it with the same kind of finish as the rest of your roof.

  6. 6

    Put in secondary rafters made of 2x4 inch boards. These rafters will support the inside of the dormer's ceiling.

  7. 7

    Slip in the window, and secure it in place. Apply caulk it, if needed, and make sure it's air tight.

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