For more than 150 years, GSW has manufactured innovative, labor-saving products that make life easier for homeowners and professionals. Today, GSW serves North America from various manufacturing locations, and is a leading supplier of high-quality thermoplastic building products for homes and businesses. GSW Thermoplastics Company is a leader in thermoplastic forming and building materials. Across North America, homeowners are recognizing the advantages of innovative, labor-saving materials that simplify the upkeep of their homes - from outdoor furniture, planters and siding to doors, windows, gutters and railings. Durability, proven performance and being virtually maintenance-free make thermoplastic building materials a natural choice.