Alside introduces its Revolution siding line a composite siding that blends natural wood ingredients with structural polymers to give new homes and remodeling projects a durable finish. Made of 50 percent virgin material and 50 percent recycled content, Revolution satisfies growing homeowner demand for green products. Plank sizes include a Single 7 in. clapboard design with 6 7/8 in. exposure and an optimal length of 12ft. 6 in.