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Built-Up Roof Systems
For more than 100 years, "tar-and-gravel" roofs, or built-up roofs (BUR) have been in use in the U.S. BUR systems are generally made up of alternating layers of bitumen and reinforcing fabrics followed by a top layer of ballast (gravel).
It provides excellent waterproofing protection.
Built-up Roofing provides ultra-violet protection
It lasts longer to weather inclemency
Low-life cost maintenance
Approximately half of the roofs installed by Sprague Roofing Company in and around the greater Lincoln/Omaha area are Built-Up Roof Systems.
Single-Ply roofing systems are composed of insulation, a single ply membrane, flashings and adhesive.The three most common types of single-ply membrane systems are TPO, EPDM, and PVC.
The methods of securement of these systems range from ballasted to mechanically attached to totally adhered. Seams can be taped, glued, heat-welded, solvent welded, and mechanically fastened to provide a strong, watertight monolithic system.
The many available options can cover a variety of requirements and Sprague Roofing is very well versed in assisting our customers in determining the appropriate system to service their needs. We try to look at the requirements the facility places on the roof before determining which system may be the most durable and cost effective.
Modified Bitumen Systems
Modified Bitumen (MB) roofing is an asphalt-based, layered roofing system, employing multiple layers of asphalt and reinforcers around a core of plastic (APP) or rubber (SBS) modifiers. The membranes used are usually 120 to 180 millimeters thick and are applied by one of the following methods: Hot Applied, Cold Applied, Heat Welded, or Self-Adhered.
Essentially, MB Systems are an evolution of Built-Up Systems. The combination of the speed and convience, (similar to single-ply) and the duribility and longevity (similar to BUR) make MB roofing system a popular choice.
Currently Sprague Roofing Company is the only contractor in the area using a cold applied modified bitumen adhesive applicator.