How do you spell Roofing

Available Definitions:
1)  n. - The act of covering with a roof.
2)  n. - The materials of which a roof is composed; materials for a roof.
3)  n. - Hence, the roof itself; figuratively, shelter.
4)  n. - The wedging, as of a horse or car, against the top of an underground passage.
5)  v. t. - To inclose in a house; figuratively, to shelter.