TopBuild is an installer and distributor of insulation and other building products to the construction industry. Co. operates in two segments: Installation, which provides insulation installation services, including fiberglass batts and rolls, blown-in loose fill fiberglass, blown-in loose fill cellulose, and polyurethane spray foam, as well as installs other building products including glass and windows, rain gutters, afterpaint products, fireproofing, garage doors, and fireplaces; and Distribution, which distributes insulation, insulation accessories and other building products including rain gutters, fireplaces, closet shelving, and roofing materials.