Abstract: A building panel for surfacing exterior and interior wall and roof structures comprises an outer shell formed of relatively thin, molded hardboard material having upper and lower edges, opposite ends, a molded outer surface adapted for exposure to the weather and a back surface. The shell is formed with a cross-sectional profile extending transversely between the upper and lower edges comprising a lower edge portion extending upwardly and outwardly of the lower edge of the panel and a back plane of the panel joining an intermediate portion which is spaced outwardly of the back plane. A row of fastener receiving depressions is formed along an upper edge of the intermediate portion and these depressions have a base spaced inwardly of the surrounding surface with a back face of said depression bases lying substantially on said back plane. The profile further includes an upper edge portion above the row of fastener receiving depressions which terminates along the upper edge of the panel.