Robert N. Karpp, founded in 1979, is a drywall specialty supplier of drywall products. The company stocks a wide variety of drywall products, including doors and hardware, steel studs and tracks, lumber and access panels. It also sells a variety of accessories, such as metal lath, expanded corner beads and trims. Its trained staff provides technical assistance to customers. Robert N. Karpp maintains a fleet of trucks to deliver products to customers. The company operates a service department that provides repair services. Robert N. Karpp s Web site offers details about its products and services. The company is headquartered in Boston and has offices located in Abington, Attleboro, Cape Cod and Rowley, Mass.