I am having a side extension built and requested the builders to put 2 fixed windows in the roof. I am little concerned that what is being fitted is a standard window and not a proper "roof" window. The top of the window frame sits between the roof joists and the bottom of the window sits on top of the frame. Photos are attached showing current state. If these windows aren't fit for purpose, I'd rather say something now than when they are all fitted and made good. I would appreciate any advice from those with more roofing and window fitting than me.