Built-Up roof systems employ the use of fiberglass felts, modified bitumen membranes and asphalt to provide a system that is a tried and true within the commercial roofing industry with a proven track record. We have been installing these roof systems for over 65 years with numerous repeat clientele. An Orndorff and Spaid installed Built-Up roof system provides the owner with peace of mind knowing they have a validated system by a quality contractor.