TPO White Roofing Systems Dallas, Fort Worth, Oklahoma City

TPO White Roofing Systems Dallas, Fort Worth, Oklahoma City

TPO, or Thermoplastic Olefin or Polyolefin, systems are comprised of single-ply roof membranes constructed from ethylene propylene rubber.

TPO systems are designed to combine the durability of rubber with the proven performance of hot-air weldable seams. They have been tested as having excellent resistance to ozone, are algae-resistant, environmentally friendly and safe to install. The material’s manufacturers are so confident in properly welded seams that the material is sometimes advertised as a monolithic (seamless) roof.

Benefits of TPO:

  • Resistant to fire, chemicals, grease, high winds, and punctures.
  • Installed without disruption to building operations
  • Highly reflective. The white membrane delivers real cost savings for building owners and managers.
  • Code compliant
  • Professionally installed by authorized contractors
  • Backed by the industrys best warranties

This high, sustained reflectivity is saving significant energy and money for building owners all over the United States. Because the TPO roofing system is mechanically-attached and insulation can be placed under the membrane during the roof installation, you can reduce your buildings heat loss in the winter.

White TPO systems carry the EnergyStar label for approved energy saving roofing products. The U.S. Environmental Protection Agencys EnergyStar labeling program identifies roofing products that can reduce energy consumption and reduce problems associated with heat build-up, smog and air pollution.

How it Works

Seam strengths are 3 to 4 times those of EPDMs adhesive and tape seams. TPO is highly resistant to tears, impacts, and punctures with good flexibility to allow for building movement. TPOs are available in white, light gray, and black with thicknesses of either 45 mils (.045) or 60 mils (.060). The width of the membrane depends on the manufacturer but they usually come in widths of six to twelve feet and are one hundred feet in length.

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. What actually happens is the glue creates a chemical bond with the membrane. Ballasted simply means the membrane is loose laid over the top of the roof, sealed at all penetrations and around the perimeter, and then a ballast is put on it to hold it in place. Ballast usually consists of smooth, round, river rock 2 — 3 in diameter and is applied at a rate of 1,000 to 1,200 pounds per roof square (100 sq. ft.). Sometimes concrete pavers are used in their place. These average 20 pounds per square foot. Mechanically-attached membranes are those that use some type of special screw-type fastener to secure it. The type of fastener will depend on the type of substrate but all fasteners are generally screw-type fasteners.

Industry Thumbs-Up

TPO now has a 15-year performance history under its belt in the United States, and the majority of roofers are giving the product a thumbs-up. According to RSIs 2007 State of the Industry Report, approximately 75 percent of commercial roofing contractors are completely satisfied with the performance of TPO, and this number has grown each year. In 2006 the majority of RSIs readers said they saw the most opportunity in the single-ply roofing sector led by TPO which underscores the encouraging industry statistics previously mentioned.

Rooftop temperatures are as much as 60 degrees Fahrenheit (F) cooler with a white sheet compared with a black EPDM, modified bitumen, or built-up system.

Knowledge is KEY to selecting the correct system and solution for your facility. Contact Dorseys today for a free estimate and consultation.

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