GAF Materials Corporation was founded 1886, and has grown to be North America's largest roofing manufacturer by delivering on two simple promises. They help assure your best and safest choice in roofing. They have a tradition of innovation and excellence that has made them one of the most respected roofing manufacturers in the world, with industry-leading brands.

GAF employs more than 3,000 people in 29 manufacturing plants and sales offices throughout the United States.

CertainTeed began as General Roofing Manufacturing Company in 1904 in East St. Louis, Illinois. The company manufactured roofing products, it was the predecessor of today's CertainTeed Corporation. General Roofing's early reputation for quality and service grew, and so did the company. CertainTeed owns and operates AirVent Inc.

In 1988, CertainTeed became a wholly owned subsidiary of Saint-Gabain. Renowned for its expertise in glass technology, Saint-Gobain is the world's largest building materials company. Saint-Gobain Corporation, based in Valley Forge, Pennsylvania, is the holding company for the U.S.- and Canadian-based businesses of Saint-Gobain, and employs approximately 30,000 people and operates more than 200 plants throughout North America.

CertainTeed is an industry leader, firmly established as one of America's most diversified building materials manufacturers. The company has more than 45 manufacturing facilities and employs approximately 7,200 people throughout North America.

E.L. Craig began his own roofing business at the age of 69 in an old streetcar barn in Joplin, Missouri in 1944. His wife named the company "TAMKO" using the first letters of their five target market states—Texas, Arkansas, Missouri, Kansas, and Oklahoma.

The streetcar barn, a long and narrow structure, was ideally suited to house a roofing production line. It also served as TAMKO's first headquarters. Despite material and supply shortages created by World War II, Mr. Craig had TAMKO up and running before the year was over. TAMKO supported the war effort in 1945.

TAMKO Roofing Products, Inc. has grown beyond its original building and territory to become a leading national manufacturer of residential and commercial roofing products, waterproofing, cements and coatings. It is still family-owned, still has high work ethics, and continues to deliver products with the high standards.

Owens Corning, the company that invented glass fiber, boasts a fascinating history of innovation and entrepreneurship. This legacy has continued as the company grew into the world leader in advanced glass and building material systems, and expands globally through today's competitive, international markets.

Both Owens-Illinois Glass Company and Corning Glass Company had been experimenting with glass fiber technology. In 1932, a young researcher was attempting to weld together architectural glass blocks to form a vacuum-tight seal. A jet of compressed air accidentally struck a stream of molten glass. This resulted in fine glass fibers. They immediately began conducting experiments substituting glass fibers for natural or other synthetic fibers in textile applications. The glass-fiber textile industry is still going strong.

In addition to many other products Owens Corning makes one of the very best brands of residential siding.