Westlake’s building products businesses make some of the world’s most prevalent items, including residential siding, trim and molding; pipe and fittings for various water, sewer and industrial applications; profiles for windows and doors; fence and decking; along with films for various inflatables, wallcovering, tapes and roofing applications. Our products are sold and marketed under the trade names NAPCO Pipe & Fittings, LASCO Fittings, Dimex, Royal Building Products and DaVinci Roofscapes. Recently, Westlake acquired Boral North America's building products business including: stone, roofing, windows, siding and trim.