Abstract: A patio cover gutter facia is adapted with two substantially elongated side members which are provided with a complementary mating mechanical design for forming a box beam from interlocking two opposed identical gutter facia. One of the elongated sides of the gutter facia is provided with a screw groove for attaching to a roof panel in a common gutter application. The same side provided with the screw groove is also provided with a first lock member of an interlocked joint. The other one of the elongated sides is provided with a second lock member of an interlock joint. The method of fabricating the gutter facia of the is preferably from a low cost extruded aluminum process which will yield a quality product.

Abstract: An elongated, substantially V-shaped roof panel and a roof panel interlocking method using the V-shaped roof panel, having the inclined sides of the V-shaped roof panel provided with elongated stair-stepping reinforcement ribs for purposes of producing a more rigid and stronger roof panel. At the terminating ends of each of the inclined sides there is provided a complementary mechanical lock design that produces a roof panel lock when a first terminating end member, of a plurality of identical roof panels, is mated with an adjoining second terminating end member of a plurality of identical roof panels. Each terminating end mechanical lock design is comprised of various bends in material, shaped such that when adjoining ends of a plurality of identical roof panels are interlocked, the various bends of each lock design are in a closely coupled relationship.