PROBLEM TO BE SOLVED: To provide a folded plate roof on which a heat insulating structure can be provided along at least the slanting surface shape of projecting parts and easily mounted in a roof structure with projecting parts and recessed parts sequentially repeated, particularly even in a folded plate roof structure. SOLUTION: A plurality of moss greening materials for a roof assembled along the surface shape on at least one surface on the outer surface side of the projecting part are mounted in the roof structure of the folded plate roof of rugged cross section with the projecting parts and the recessed parts sequentially repeated, and the moss greening material comprises a porous layer, a nonwoven fabric layer and a moss mat layer in cross section from the mounted side. COPYRIGHT: (C)2009,JPO&INPIT