Abstract: A mold assembly and method for forming a siding panel with an integral continuous rail are disclosed. The mold assembly includes a slide mold member, a lifter mold member, a stationary mold member and a rear mold assembly. The slide mold and lifter mold members include surfaces for forming the rail. Molten plastic is injected into the mold cavity and cooled. The lifter mold member is moved toward the molded siding so as to move the molded siding panel away from the stationary mold member. The slide mold member is moved away from a portion of the lifter mold member and toward the molded siding panel so as to move the molded siding panel away from the lifter mold member and causing the rail to flex as it slides over the convex portion of the lifter mold member.

Abstract: A wall covering comprising a plurality of panels each formed with a plurality of horizontal rows of simulated building elements, such as hand laid stone separated by simulated lines of mortar. The panels have side marginal edge regions formed with hooks and side opening slots that are interengageable as an incident to relative lateral movement of the side marginal edge regions during installation, with the rows of simulated building elements in one panel, being drawn into aligned and predetermined spaced relation to the rows of building elements and adjacently mounted panel. The underlying side marginal edge region of each panel is formed with a non-planar undulating surface similar to the mortar lines throughout the panel, and the overlying side marginal edge region of each panel further is formed with a complementary undulating surface for tight mounted positioning onto the undulating surface of the underlying side marginal edge region.

Abstract: A plastic molded wall covering that includes a plurality of one piece plastic molded corner moldings mounted in a vertically stacked array. The corner moldings each have a pair of front panels disposed at an angle to each other and formed with simulated building elements, such as hand laid stone. The corner moldings have respective upper and lower interlock devices and internal support and reinforcing walls extending rearwardly of the front panels in interconnecting relation to the interlock devices. The internal support and reinforcing walls have a curved serpentine configuration with a curved junction line with the respective front panels such that any plastic molded sink mark exposed on a front side of the front panels from the integrally formed internal walls similarly is undulating so as to blend into the simulated building elements and not detract from its natural appearance.

Abstract: A roof or wall covering comprising a plurality of horizontal courses of molded plastic panels each formed with a single row of simulated shake shingles. The panels have a continuous upper interlock flange that facilitates inner-engagement of the panels of overlying courses without cumbersome handling of numerous small interlock fingers which can be missed during installation. Cooperating detents are provided between the overlying lower and upper marginal edge regions which facilitate proper positioning of the panels and which support the weight of the panel during securement to a wall surface. A bottom interlock flange is supported transversely across a rear side of the panel by vertically-spaced support plates which facilitate both liquid drainage and air circulation through the installed wall covering. In the preferred embodiment, the panels in alternate courses are identically formed with different shake patterns for enhancing the natural appearance of the wall covering.

Abstract: A roof or wall covering comprising a plurality of horizontal courses of molded plastic panels each formed with a single row of simulated shake shingles. The panels have a continuous upper interlock flange that facilitates inner-engagement of the panels of overlying courses without cumbersome handling of numerous small interlock fingers which can be missed during installation. Cooperating detents are provided between the overlying lower and upper marginal edge regions which facilitate proper positioning of the panels and which support the weight of the panel during securement to a wall surface. A bottom interlock flange is supported transversely across a rear side of the panel by vertically-spaced support plates which facilitate both liquid drainage and air circulation through the installed wall covering. In the preferred embodiment, the panels in alternate courses are identically formed with different shake patterns for enhancing the natural appearance of the wall covering.