VALLEY FORGE, PA -- CertainTeed Corp., a manufacturer of exterior and interior building products and a subsidiary of Saint-Gobain, announced Jan. 2 the addition of gypsum wall board and ceiling tiles to its CertainTeed-branded line of interior and exterior building products, according to CNW TELBEC.

"This is a watershed event for our company," says Peter Dachowski,

president and CEO of CertainTeed Corp. "With the exception of our insulation business, historically, the CertainTeed brand has been known primarily for products used on residential, exterior applications. The addition of Ceilings and Gypsum to our brand family now gives us formidable strength for interior and commercial applications as well."