Patent ID: 7482038

Claim:
A method for forming cellular poly vinyl chloride clapboard siding, comprising: profiling a cellular poly vinyl chloride board in a moulder to yield a two-up back-to-back configuration, wherein the profiling comprises: milling a first end and a second end of a cellular poly vinyl chloride board to form a profiled end, a radius, and a lower assembly groove on each of the first and second ends; milling a first and a second face of the cellular poly vinyl chloride board to qualify a thickness of the board; and milling a first saw groove and a first upper assembly groove on the first face and a second saw groove and a second upper assembly groove on the second face; sawing the profiled cellular poly vinyl chloride board at the first and second saw grooves to yield at least two cellular poly vinyl chloride clapboards; and coating the cellular poly vinyl chloride clapboards with a polyurethane based coating.