A covering material which can be plastically deformed by band and extended in at least one direction. The covering material has a substrate with openings, at least the top side of which substrate has a top coating which covers the openings. To create an economical covering material for
A sub-roofing element for a flat, plate-shaped structural element, in particular for a solar energy collection module that can be fastened to joist elements that can be laid on a pitched roof in the ridge-eaves direction, whereby the sub-roofing element is made of watertight material