Patent ID: 6971211

Claim:
A siding unit comprising: a panel having at least three courses comprised of a cellulosic/polymer composite, said composite comprising: (a) at least one cellulosic filler in an amount of about 30% to about 60% by weight of said composite; and (b) at least one polyvinyl chloride material in an amount of about 40% to about 70% by weight of said composite, said at least one polyvinyl chloride material comprised of at least one stabilizer in an amount of about 1 to about 10 parts per 100 parts of a polyvinyl chloride resin, at least one lubricant in an amount of about 2 to about 12 parts per 100 parts of said polyvinyl chloride resin, at least one process aid in an amount of about 0.5 to about 8 parts per 100 parts of said polyvinyl chloride resin, and at least one inorganic filler in an amount up to about 10 parts per 100 parts of said polyvinyl chloride resin.