CertainTeed begins producing solid vinyl siding.

CertainTeed and Saint-Gobain began a joint venture to manufacture and sell insulation in the United States.

Norton Company purchases U.S. Stoneware of Akron, Ohio, a maker of engineered ceramic and metal specialty products used in the chemical and petrochemical industries.

Norton Company purchases Clipper Manufactuing Company, a producer of concrete- and masonry-cutting equipment.

General Roofing Manufacturing Company changed its name to Certain-teed Products Corporation—a contraction of the company’s slogan, “Quality made Certain, satisfaction guaranTeed.”

Norton Company began manufacturing refractory products—ceramic materials used to line the interior of kilns and furnaces—as well as a wide variety of ceramic containers for chemical reactions.

General Roofing Manufacturing Company (later to become CertainTeed) was established in East St. Louis, Illinois, by George M. Brown.

Norton Emery Wheel Company, later to become part of Saint-Gobain, was founded to manufacture the world’s first precision-made, mass-produced grinding wheel.