ROOFING SYSTEMS

Single Ply Systems

Roofing membranes that are applied in one layer. They come in five basic types; Ballasted, Fully-Adhered, Mechanically-Fastened, Partially-Adhered and Self-Adhered. The two major membrane types are EPDM and TPO:

• • EPDM roofing systems are based on ethylene propylene diene terpolymer, a high performance synthetic rubber compound that provides outstanding weathering characteristics.

  • TPO is a proprietary thermoplastic polyolefin combining polypropylene and ethylene propylene rubber. The white, scrim-reinforced membrane combines the weathering ability of rubber with the heat welding ability of a thermoplastic in a highly flexible sheet with excellent lay-flat characteristics.

Built up Roofing Systems

A continuous, semi-flexible roof membrane assembly, consisting of piles of saturated felts, coated felts, fabrics or mats between which alternate layers of bitumen are applied, generally surfaced with mineral aggregate, bituminous materials, or a granule surfaced roofing sheet. Also know as BUR.

Metal Roofing Systems

Standing-seam metal roofs are used with many types of high-pitched expanses of roof that can be enhanced with strong definition of the architectural lines. In addition, standing-seam installation is sometimes easier than other roofing styles.

Standing-seam metal sheets go through a roll-forming process to create the panels. The roll-formed panels are custom cut to the specific lengths of the roofs. Because they are custom cut, the product is usually special-ordered for each job.

Roof Coatings

Roof coatings can be applied to almost any roofing system and offer several benefits such as extended roof life, energy savings and decreased pollution.

Coating reflects at least 68 percent of the sun’s energy after three years, which is 30 percent higher than the minimum initial and aged reflectance requirements of the Environmental Protection Agency’s Energy Star program.

Industrial Explosion Vents

An explosion vent or “rupture panel” is a safety device used to protect buildings against excessive explosion incurred pressures by means of pressure relief.

PVC

PVC roofing is made from two layers of PVC roof material with polyester added in between the layers to act as a reinforcement. The layers in a PVC roof include additives to make the material flexible, UV stable, and to prevent curing. By adding a layer of acrylic coating to roof membrane, a PVC roof is made reflective and repellent to dust and dirt.