Dormer window installation

[Harry0013]

Really stuck on this issue and need some decent advice.

We are installing a new dormer on the back of our house. Previous 60s dormer was too cold and flimsy.

Window fitter has installed new windows yesterday and I am not sure the top looks right. When the plasterboard is in place the top of the window will be above the ceiling.

Is this right? Any advice hugely appreciated.

 

[Mr diy a lot.]

Looks ok to me. Looks like there might be some more brandering to go up onto beams and then plasterboard will butt up against plastic frame of window.

 

[^woody^]

You can't have a roof bearing on a plastic window! That's your first problem.

How is the roof being ventilated?