Abstract: The present invention provides a system for attaching a panel to a building wall using an elongated channel. The panel has a main panel portion, a panel edge portion and a groove therebetween. The elongated channel has a body and a pair of rails. The body is attachable to the wall by a fastener. The pair of rails are integrally formed with the body, extending substantially perpendicularly from the body in the same direction. One, or both, of the rails ends in a flange that is contoured to engage the cavity formed by the groove when the panel edge portion is bent around the groove and toward the rail.