Gentek Building Products is a manufacturer and distributor of siding, windows, patio doors, and related exterior building products for homes. Its portfolio spans economy to premium options, serving homeowners and building professionals with solutions for a range of projects and budgets. Exterior cladding includes vinyl, aluminum, and steel siding, along with vinyl soffit, vertical siding, shakes, and scallops.

Gentek also offers aluminum soffit and fascia, trim, gutter coil, rainware, and decorative accents. Window products include replacement and new-construction vinyl windows, patio doors, and insulated glass packages; the company highlights energy efficiency, durability, and design. Its featured collections include Sequoia Select, Board & Batten, Signature Supreme, and Fairhaven Sound shakes and scallops.

Gentek supports product selection with a color collection, visualizer, blog, and other homeowner design resources. For professionals, it provides product specifications, testing information, ordering platforms, measurement and visualization tools, and marketing materials. Customers can locate distributors through the company, while businesses can explore becoming Gentek dealers