Built here in our Oregon woodshop, this telescoping cover is best in class. We use a full 2” frame, a 3/8” exterior grade panel, and a heavy gauge rust-proof metal cover that is more robust then the soft aluminum that most manufacturers use. This metal cover wraps around the wood a full 1” to provide outstanding protection. Our wood frame is rabbet jointed, glued and stapled for great strength. The panel is also glued and stapled to the frame.