Westlake businesses in the Housing & Infrastructure Products segment manufacture finished goods used in residential and commercial construction applications, such as residential siding, trim and moulding, pipe & fittings, architectural stone, cement, clay, metal and polymer composite roofing, outdoor living products including decking and matting, and films. The combined capacity of our global manufacturing facilities is 3.5 billion pounds per year.




Westlake Royal Building Products

Our vinyl resin and compound products are the foundational materials used in the production of residential siding, trim and mouldings and windows. Other base materials are used in premium siding and accessory products, roofing, architectural stone and outdoor living products. Westlake Royal Building Products USA Inc. is a leader throughout North America in the innovation, design, and production of a broad and diverse range of exterior and interior building products, including Siding and Accessories, Trim and Mouldings, Roofing, Stone, Windows and Outdoor Living. For more than 50 years, Westlake Royal Building Products has manufactured high-quality, low-maintenance products to meet the specifications and needs of building professionals, homeowners, architects, engineers and distributors, while providing stunning curb appeal with an unmatched array of colors, styles, and accessories.


Westlake Global Compounds

Westlake engineers and manufactures both rigid and flexible vinyl compounds, injection molding compounds, extrusion compounds, and blow molding compounds, used in a wide range of different applications. Compounds produced by Westlake are found in high-use, high-demand products such flexible wire and cable, rigid fittings and electrical components, household fixtures, food-grade and general-purpose bottles, automotive trim, outdoor applications including windows, decking, trim and fencing and vinyl records, and much more. Westlakes compounding business has facilities around the globe, including in China, France, Germany, Italy, Japan, Mexico, Spain, the United States, and Vietnam. Additionally, Westlake has a world-class research facility in France, and several application laboratories.


Westlake Pipe & Fittings

As the second-largest PVC pipe manufacturer in North America, Westlake produces a wide range of pipe & fittings, including rubber gasketed, solvent weld, and restrained joint. Our pipe is used in applications essential to the everyday life of consumers, including municipal water and sewer, residential plumbing, water wells, mining, and agricultural and turf irrigation. Recently, Westlake introduced a new, molecular oriented PVC (PVCO) pipe product. The new PVCO pipe features a lower manufacturing carbon footprint than other water main materials.


Westlake Dimex

Based in Marietta, Ohio, Dimex produces a range of consumer and building products, including landscape edging; industrial, home and office matting; marine dock edging; and masonry joint controls. Dimex produces a variety of consumer products made from post-industrial-recycled polyvinyl chloride, polyethylene and thermoplastic elastomer materials. Dimex has over 30 years of experience and is one of the largest processors of recycled plastic materials in the United States. Dimex also supplies recycled flexible PVC and TPE compounds to other environmentally conscious manufacturers. Because Dimex uses its compounds in its own products, the company is uniquely positioned to understand its customers needs and to provide the engineering, manufacturing, and distribution capabilities to meet those needs quickly and effectively.