From Longman Dictionary of Contemporary Englishroof something ↔ in/over phrasal verb British EnglishTBCto cover an open space by putting a roof over it We’re going to roof in the yard to make a garage. → roof→ See Verb table
Examples from the Corpus
roof in/over• However, it is clear that he was not displaying a taxi roof sign.• The best estimates are that Cairo has half a million roof dwellers.• The siding was falling off, and the roof was caved in.• There is no danger of the walls collapsing under the load of these roofs.• The roof was in an appalling state and the supporting beams were rotten.• Ice damming occurs when snow on a roof melts when in contact with warm shingles.• Window eaves and roof gutters curve in organic efficiency rather than follow a mechanical right angle.• We absolutely have to get them out of there and find a roof to put over their heads. 