J & B Materials, founded in 1979, is a supplier of building materials in South California. The company operates a fleet of trucks that provides on-time delivery services. It specializes in drywall, steel framing and pool plastering products for residential and commercial projects. J & B Materials maintains a stock of forklifts and related equipment. It is a founding member of Amarok, which is a national gypsum, lath and plaster dealer-buying cooperative. The company also has offices in Escondido and Riverside, Calif. J & B Materials works in collaboration with Owens Corning, Dietrich Industries and National Gypsum companies. It is located in El Cajon, Calif.