Oldcastle Glass, renamed as the Oldcastle BuildingEnvelope, is one of the world s leading suppliers of building envelope solutions, including architectural glass and aluminum glazing systems. The firm offers a variety of products, such as window wall, skylights, architectural windows, curtain wall, entrances, engineered specialty and store fronts. It serves architects, building developers/owners, contractors and the commercial glazing community. Some of the company s completed projects include the Great American Tower, Sky Las Vegas, RBC Centre and Atelier. The company s more than 4,000 employees operate from over 50 locations throughout North America. Oldcastle BuildingEnvelope is a U.S. subsidiary of CRH plc., which is one of the global leading firms providing building products.