The Eco-Seam panel is an economical, one-piece, positive-interlocking, standing seam metal roof panel. There are no extra caps, strips or clips needed. Installation is accomplished by hooking the panel into the previous panel and fastening with mechanical fasteners through pre-punched slots to allow for expansion and contraction. The fasteners are covered by the adjacent panel. The positive locking action makes it virtually impossible for the panels to slide apart.