PVC Single-Ply Membrane
This roofing material is arguably the most popular of all flat roofing materials. PVC membranes are a single layer of thermoplastic material. PVC roofs are especially strong and durable, featuring a minimum breaking point of 300 pounds per inch, compared to the industry-recommended 200 PPI.
Seams are heat-welded (hot air welded) to form a watertight bond. The welded seams are actually stronger than the material itself. Most PVC membranes, especially while-colored ones, are very energy efficient as they reflect the sun's energy instead of absorbing it. The PVC membranes often come with lifetime warranties.
Another single-ply roofing membrane that chemically bonds rubber, ethylene and propylene, as well as numerous filler materials. TPO roofs have been vastly growing in popularity ever since their introduction in the early 1990s.
Part of what is fueling their recent rise is energy-efficiency, as they are more readily available in white and light gray (as well as black) compared to their closests competitors, PVC and EPDM. TPO is said to offer the best of both EPDM and PVC in one package. The material is closer to a rubber roof in cost, but also features welded seams for durability, like PVC membranes.
Commonly known in the industry as a rubber roof. One of the biggest advantages of EPDM over a PVC roof membrane is a much lower price. PVC and EPDM typically go 1-2 in terms of popularity for flat roofing, depending on what area you live in.
The seams of EPDM are not as strong as the PVC, heat-welded joints either. EPDM also has a tendency to absorb heat, which can drive up utility bills for the property owner.
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Carlisle Syntec Systems
Carlisle is the only commercial roofing manufacturer to produce all three major roofing membranes - TPO, PVC and EPDM - and is the world's largest manufacturer of EPDM, TPO and polyiso insulation. For nearly half a century, Carlisle Syntec has been the trusted provider of the most dependable and longest-lasting single-ply membranes in the commercial roofing industry.
Thermoplastic polyolefin, or TPO, is the the fastest-growing segment of the commercial roofing industry. Fueling this growth is the increased use of TPO in southern climates where cooling costs significantly outweigh heating costs. Carlisle's Sure-Weld TPO membranes are ENERGY STAR-qualified and CRRC (Cool Roof Rating Council) certified
and have been directly attributed to a reduction in a building's energy consumption by
greatly diminishing the cost of air conditioning. In addition to Sure-Weld TPO, Carlisle
offers Spectro-Weld, the industry's most reflective single-ply membrane designed for installation in conjunction with PV applications, as well as any project that benefits from long-term reductions in cooling costs.
Polyvinyl Chloride (PVC) is a trusted membrane that has been performing admirably for decades in the European and North American markets. Another option for reflective roofing, Carlisle's Sure-Flex PVC membranes are ENERGY STAR qualified and CRRC certified and offer building owners the potential for decreased cooling costs. Sure-Flex PVC also offers excellent resistance to rooftop chemical attacks including acids, oils and greases.
Thermoplastic Polyolefin (TPO) and Poly Vinyl Chloride are both thermoplastic roof systems that provide a white and highly reflective surface. Both of these systems provide excellent weathering capabilities and a high resistance to both ultra violet lite, chemicals and ponding water.
These systems make for excellent retro-fit systems over an existing roof and can be installed by either mechanically attached or fully adhered methods.
The system is considered very eco-friendly and green.