TPO: Thermoplastic Olefin or Polyolefin
TPO membranes are single-ply roof membranes constructed from ethylene propylene rubber. TPO is designed to combine the durability of EPDM rubber with the proven performance of hot-air weldable seams. They have been tested as having excellent resistance to ozone, fire, are algae resistant, eco-friendly, 100% recyclable and safe to install. TPO is a single ply roofing membrane currently in use on commercial and industrial structures.
TPO is an elastomeric membrane that is highly resistant to tears, impacts, and punctures with good flexibility to allow for building movement. TPO’s are available in colors with thickness of either 45 mils (.045) or 60 mils (.060) or 80 mil (.080).
TPO membranes are installed fully-adhered, mechanically-attached or ballasted. Fully-adhered means that the roof is glued to the substrate using a special adhesive. Ballasted simply means the membrane is loosely laid over the insulation. The entire roof assembly is covered with rock ballast, pavers, or a combination of both. The adjoining sheets are overlapped approximately 2” and seamed together with a min 1.5” wide heat weld. Mechanically-attached membranes are those that use fasteners, plates or an approved insulation adhesive to secure the TPO membrane to the substrate. Adjoining sheets are overlapped approximately 5” and seamed together with a min 1.5” wide heat weld.
Properly installed TPO roof systems have service lives ranging from 10 to 20 years, depending on the type of installation.
Because the TPO roofing systems are mechanically-attached and insulation can be placed under the membrane during the roof installation, you can reduce your building’s heat loss in the winter.
The trend toward Energy Star-labeled, compliant reflective roofing is a huge benefit for TPO Roofing Systems. This high, sustained reflectivity is saving significant energy and money for building owners all over the United States. White TPO carries the Energy Star label for approved energy saving roofing products.
The U.S. Environmental Protection Agency’s Energy Star labeling program identifies roofing products that can reduce energy consumption and reduce problems associated with heat build-up, smog and air pollution.
Remember, the number one ingredient to a good roof system is proper installation.