skylights
They are commonly called dorma windows
"Roof windows are windows in the roof, such as, skylights or pivot-type windows. They allow sunlight into a room and create a feeling of expansiveness."
do grants cover windows and roof
Velux roof windows are widely available from building supplies companies. For example Velux windows can be bought from Screwfix, Wickes and Ken's Yard.
Skylights
it is called a roof
Pillars Hipped roof Fanlight Sash windows Roof Balustrade
The roof
The roof of the cavity is called the "dorsal surface."
the floor and the roof but not the floor
It is what you called the planning for the roof.
Roof