There's no uncertainty about CertainTeed's business. A subsidiary of French industrial giant Compagnie de Saint-Gobain, CertainTeed manufactures building products for both commercial and residential construction. CertainTeed's products include exterior and interior building products, including roofing, siding, trim, sheathing, fence, decking, foundations, windows, insulation, ceilings, drywall, performance wallboards, tile backers, underlayments, infrastructure, and pipe. CertainTeed sells its products under the Bufftech, CertainTeed, Form-A-Drain, Prestige, and Wolverine brands.