Roofs

A roof of corrugated sheet material having profiled cross-section of alternate troughs and ridges. The troughs have adhered therein a filler material to fill the troughs to at least a level flush with the level of the ridges on each side thereof. A waterproof sheet covering is located and adhered over the whole extent of the roof. The troughs may have a substantially greater width than the width of the ridges. The filler material may be in the form of elongated blocks or a panel of heat insulating material. The roof may be formed in sections, juxtaposed and attached to side walls of a structure such as a vehicle prior to the covering being adhered thereto.