Collocations for roof - noun

conical, flat, gabled, mansard, pitched, pointed, sloping, steep | corrugated iron, glass, slate, thatched, tiled, tin | car, church, etc.

support
The roof is supported by stone columns.

slope
The roof slopes down to the top of the windows.

cave in, fall in, collapse
Five people were killed when the roof fell in.

leak

space
The burglars removed tiles to climb into the roof space.

covering, slate, tile | beams, rafters, structure, timbers | insulation | garden, terrace
The hotel has a charming roof garden.

in a/the ~
There are small windows in the roof.

on a/the ~
There''s a cat on the roof.

under your ~
(= in your house) I won''t have that man under my roof again!

under one/the same roof
(= in the same building) We''re good friends but we could never live under the same roof.