Manufacturer and marketer of exterior building products in the United States. The company offers siding, shutters and window treatments, ventilation systems, rain removal systems, aluminum soffit, trim, injection-molded, fascia, door surround systems, mantel systems, decorative moldings, corner posts, corner lineals, fixture mounts, mini mounts, and accessory products for the residential remodeling, new construction, and light commercial markets. Its brand names include Mastic (siding sold under the lines Cedar Discovery, QUEST, and Brentwood) and Alcoa-branded siding (lines including Grand Sierra, Liberty Elite, and Board & Batten).