Building panel - first ridge has attachment zone, second ridge partially overlapping it

摘要

The building panel has first and second opposed marginal ridges, a first of the marginal ridges provided with an attachment zone whereby the panel is attachable to a building structure by at least one fastener, and the second marginal ridge being of different cross-section but partly complementary to the first marginal ridge to permit the second marginal ridge, in use, to be laid in overlapping relationship over a first marginal ridge of an identical panel already attached to a building structure thereby to cover and conceal the attachment of the further panel to the building.