Corporate Headquarters  |  Westbrook  |  Medway  |  Berlin  |  Bridgeport Corporate Headquarters 260 Daniel Webster Highway P.O. Box 865 Merrimack, NH 03054-0865 Toll Free: 800.715.7001 Phone: 603.424.7001 Fax: 603.424.3541 info@merrimackbuildingsupply.com Print and Fax Credit Application Employee Application