Abstract: An elongate panel of siding to be mounted generally horizontally on the wall of a building. This panel, which may be of thin sheet metal, has two opposing faces, constituting inside and outside faces, and upper and lower longitudinal edges. Hooks are bent down from the upper edge on the outside face of the panel and a plurality of holes are spaced below but relatively close to the upper edge of the panel for receiving fasteners to secure the panel to the wall. At the lower edge of the panel is a continuous flange bent to extend inwardly from the lower edge of the panel and having a lip bent up at its inner edge for engaging the hooks of the panel therebelow on the wall.