Where are CertainTeed roof shingles manufactured?

CertainTeed roof shingles are manufactured in multiple plants across North America, primarily in the United States and Canada, as CertainTeed is owned by Saint-Gobain and operates a large network of roofing plants. In the United States, CertainTeed manufactures shingles at plants in Oxford, North Carolina, Shreveport, Louisiana, Chowchilla, California, and other locations. The Oxford, North Carolina plant is one of its largest and most modern, producing Landmark and Landmark Pro architectural shingles. In Canada, CertainTeed shingles and its sister brand BP Building Products shingles are manufactured in Canadian plants including LaSalle, Quebec which is a major shingle plant serving eastern Canada, and other facilities. CertainTeed also operates a plant in Anjou, Quebec for roofing materials. The company's Canadian operations are part of Saint-Gobain's North American roofing division. All CertainTeed plants are certified to meet ASTM and CSA standards for North America, with Canadian plants producing shingles with bilingual packaging and CSA A123.5 compliance for Canadian building codes. CertainTeed shingles are made from fiberglass mat, asphalt, and ceramic granules, and manufacturing involves coating mat with asphalt and embedding granules for UV and algae resistance. The company has been shifting production to more efficient plants and uses recycled materials where possible. So CertainTeed shingles are made in both USA and Canada, not imported from overseas, with US plants serving US markets and Canadian plants serving Canadian markets primarily.