EPDM is a single-ply rubber roofing membrane that is resistant to ultraviolet, weathering, and abrasion damage. Due to its flexibility, low-cost and lightweight, EPDM roofing systems are one of the most popular flat roofing systems. EPDM systems tend to have lower long-term maintenance costs because of its durability. Can be fully adhered, mechanically attached or ballasted with the seams sealed using a liquid adhesive or specialty tape.
Thermoplastic roof systems include TPO (thermoplastic polyolefin) and PVC (poly vinyl chloride). TPO and PVC are single-ply membranes that provide great weather protection. Resistant to ultraviolet lights, punctures, tears and most chemicals. Due to their white top they are energy saving. Thermoplastic roofs can be mechanically attached, fully adhered, or heat-welded.
Built-Up Roof (BUR)
Built-Up Roof systems have been used on flat roofs for over 100 years and are commonly referred to as tar and gravel roofs. BUR systems consist of multiple layers of bitumen and reinforcing fabrics that is topped with gravel. Resistant to foot traffic, hail, wind and weather damage. Excellent at providing waterproof and ultraviolet protection.
Modified bitumen is an asphalt-based roofing system that is flexiable and durable. Due to its ability to expand and contract while not losing shape, modified bitumen works great in high and low temperatures. Modified Bitumen roofing systems are resistant to punctures, tears and foot traffic. Two types of modified bitumen systems are APP (plastic based) and SBS (rubber based). APP provides better aging properties and SBS provides more flexibility.