Abstract: A wall or roof covering for mounting on a support surface includes a plurality of panels securable to the support surface. Each panel has a front surface including a covering section with simulated building elements, an opposed rear surface facing the support surface when secured thereto, an upper marginal edge region and an opposed lower marginal edge region overlying the upper marginal edge region of a vertically-adjacent panel. One of the upper marginal edge region and the lower marginal edge region has an inclined receiving slot defined therein, the other one of the upper marginal edge region and the lower marginal edge region has an inclined insertable flange engageable in the inclined receiving slot of the vertically-adjacent panel.

Abstract: A polymer building product for securement to the exterior of a building, the building product comprising a base portion securable to a substrate; a top portion slidingly telescopingly receivable over the base portion; and engaging elements, such as teeth, interengaging projections, etc. disposed on one or both of the base and top portions for securing the base and top portions together. The building product is characterized by a first, unsecured condition in which the top portion is slidingly received over the base portion in a first rotational orientation relative to the base portion and the top and base portions are freely slidingly separable, and a second, secured condition in which the top portion is slidingly received over the base portion in a second rotational orientation relative to the base portion and the top and base portions are secured together.

Abstract: In polymer building products, such as polymer siding, polymer roofing, j-blocks, gable vents, etc., characterized by fastener apertures each comprising an elongate slot bounded by a peripheral wall defining the slot, the peripheral wall having a height, a fastener centering-guide comprising a layer of material extending into the elongate slot from the peripheral wall thereof, the layer of material having defined therein (a) an elongate opening that is generally parallel to, but of smaller transverse dimensions than, the elongate slot, and (b) a predetermined location, defined intermediate the length of the elongate opening, for receiving a fastener therethrough, and wherein further the layer of material is characterized by a thickness that is less than the height of the peripheral wall and sufficiently thin so as to permit relative movement between a fastener extending through the centering guide and the polymer building product.

Abstract: A roofing system comprising a plurality of roofing panels each having a bottom surface and a top surface, opposite upper and lower edges and opposite lateral edges. The top surface of each roofing panel has the appearance of a plurality of individual shingles. The roofing panels are adapted for sliding engagement with each other along their opposite upper and lower edges and opposite lateral edges when positioned vertically and horizontally adjacent.

Abstract: In polymer building products, such as polymer siding, polymer roofing, j-blocks, gable vents, etc., characterized by fastener apertures each comprising an elongate slot bounded by a peripheral wall defining the slot, the peripheral wall having a height, a fastener centering-guide comprising a layer of material extending into the elongate slot from the peripheral wall thereof, the layer of material having defined therein (a) an elongate opening that is generally parallel to, but of smaller transverse dimensions than, the elongate slot, and (b) a predetermined location, defined intermediate the length of the elongate opening, for receiving a fastener therethrough, and wherein further the layer of material is characterized by a thickness that is less than the height of the peripheral wall and sufficiently thin so as to permit relative movement between a fastener extending through the centering guide and the polymer building product.