Greenberg is the largest roofing contactor in the region. With 4 locations, Minot, Fargo, Jamestown and Grand Forks, we serve clients in North Dakota, South Dakota, and Minnesota like no other roofing contractor can. We install, service, and maintain virtually all types of roof systems found on commercial, industrial and institutional buildings. Our personnel are experts in Service and Maintenance, Re-roofing, and New Construction. See services for more detail of roof services provided.