Abstract: A sheet metal cladding panel for cladding facades, walls and roofs, said panel (1) including a middle portion (2) between upwardly folded edge sides (4, 11), of which at least one has a portion (12) bent outwardly-downwardly to form a flange or half seam for joining juxtaposed panels to each other. To obtain simplified erection of such panels the edge side (11) formed with the half seam (12) is, as is the half seam (12), formed with a double wall along at least a part of the panel, and terminates in an attachment flange (6) projecting out from the edge side (11) for fastening the panel to a substructure.