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May 29, 2019
PVC vs. TPO Roofing Systems
PVC and TPO single-ply roofing membranes are two of the most popular types of roofing membranes on the market for low-slope and flat roofs of commercial and industrial buildings. But what are the main differences between PVC and TPO roofing membranes, and which system is right for your business?
PVC Membranes
PVC roofing membranes are made from polyvinyl chloride, a type of plastic. They have been one of the most widely used and trusted commercial roofing systems around the world for the past 30 years, and PVC has been used as a roofing system dating back to the 1960s. PVC membranes have a history of providing durability, longevity, and energy efficiency and manufacturers have made continued improvements to PVC over the years. Duro-Last is one of the best known manufacturers of PVC roofing membranes on the market.
TPO Membranes
TPO roofing membranes are made from thermoplastic olefin, a type of strong and flexible plastic that is resistant weathering elements like UV damage and extreme temperatures. TPO systems are newer compared to PVC, only being widely used for the past 20 years. Because TPO is newer, it does not necessarily mean that it is a superior product. In fact, TPO roofing systems were developed to be a less expensive alternative to PVC while maintaining a similar level of quality. However, many roofers argue that TPO roofs are more prone to seam and material failures like cracks. Despite this, TPO is still a very durable and efficient roofing option that may come in at a lower price.
Installation
Both TPO and PVC membranes are heat applied and can be fully adhered or mechanically fastened. Different TPO and PVC roofing contractors may use unique methods of installation based on the specifications of the manufacturer. It is important that you choose a commercial roofer that uses an installation method that minimizes seams. Seams are considered a weak point in a roofing system as they end up being a common source for roof damage and water leaks. At Superior Services, we use installation methods such as custom-fabrication that minimize seams, reduces the need for ongoing repair and maintenance, and increase the longevity of your roof.
Durability
Both PVC and TPO provide strong levels of resistance to weathering, heat, and UV radiation. Both materials go through rigorous testing methods outlined by the ASTM such as accelerated and heat aging tests, seam and tear strength tests, and puncture tests. PVC and TPO may provide your roof with different levels of durability and protection based on the overall thickness of the membrane and the thickness over scrim.
Cost
The total cost between TPO vs. PVC can be based on numerous factors outside of the materials used, including the thickness of the membrane applied, adhesives used for the membrane, additional reinforced layers, the type of roof, and your roofing contractor. Generally, TPO roofing systems will be less expensive than PVC, but this is not always the case based on the wide range of factors that influence price.
Visual Appearance
Nearly all manufacturers of PVC and TPO roofing membranes offer their membranes in white as well as at least one shade of grade. Some manufacturers, like Duro-Last provide additional color options such as tan and terra cotta. From an aesthetic perspective, most people find that there are few differences between the PVC and TPO.
Which is best for my business?
The reality is that PVC and TPO membranes have more similarities than differences. Both are excellent choices for commercial roofs. Most of the differences lie in the manufacturer of the TPO or PVC roofing system as well as the membrane model offered by the manufacturer. It is important to review the specifications and warranty provided by the manufacturer as a part of your decision making process.Looking for some guidance on roofing membranes? We've compared other types of roofing membranes in other articles on our site:
Still have more questions? We're here to help. Contact us today and we can help guide you towards choosing the ideal roofing system for your building.