CGC Inc.
Wholesale Building MaterialsOntario, Canada201-500 Employees
CGC Inc. is a Canadian producer, marketer, and distributor of gypsum-based building materials, including wallboard, finishing products, and suspended acoustical ceilings. Its offerings target residential, commercial, institutional, and industrial settings, with products such as plaster, cement, gypsum fillers, agricultural gypsum, and mineral fiber insulation. Based in Oakville, Ontario, CGC operates multiple mines and manufacturing facilities and benefits from the global affiliations and research resources of its parent company, USG Corporation. The company traces its origins to 1907, when it was established as the Canadian Gypsum Company, and it maintains nationwide distribution and customer service across Canada. In 2026, CGC announced expansions to Alberta, including a new wallboard manufacturing plant in Wheatland County, and a project to revitalize the Little Narrows gypsum quarry in Nova Scotia to strengthen the Canadian and North American building materials supply chain.