Patent ID: 8863461

Claim:
A panel for attachment to a mounting surface, comprising: a fastener edge configured to contact the mounting surface; a butt edge defined opposite the fastener edge; a plurality of raised faces formed between the fastener edge and the butt edge, wherein the raised faces are oriented at a first angle to the mounting surface, such that the raised faces are further from the mounting surface toward the butt edge than toward the fastener edge; a tapered keyway linking each of the raised faces, wherein the tapered keyway extends from the raised faces toward the mounting surface and is at a second angle to the raised faces; an overlap portion formed on the fastener edge from a folded layer of the panel and defining a back layer adjacent the mounting surface and a front layer distal from the mounting surface, wherein a lock slot is defined between the front layer and the back layer; an offset hem formed on the front layer of the fastener edge, wherein the front layer protrudes away the back layer and the mounting surface, and then returns toward the back layer; a plurality of fastener holes defined through the fastener edge, wherein the fastener holes pass through the front layer and the back layer and are configured to mount the first panel to the mounting surface with a plurality of fasteners; and wherein the offset hem is formed above the fastener holes, relative to gravity as configured to be attached to the mounting surface, such that a deflection point is defined above the fastener holes.