Established in 1985, Merrimack Building Supply is a distributor of commercial and residential building materials. The company operates a fleet of trucks that provides on-time delivery services. Its areas of specialization include metal framing, insulation, customized design and exterior finishing services. Merrimack Building Supply has an inventory of National Gypsum and Certainteed brand products. It offers gypsum boards, paper tapes, corner and plastic beads and fasteners. The company provides a selection of metal products, including studs, joists, tracks, furring channels, bars and clips. Merrimack Building Supply offers architectural doors and frames for interior and exterior applications. The company also operates an in-house fabrication shop. It maintains its corporate headquarters in Merrimack, N.H.