Chris Robinson Florida State Roofing Contractor 941-773-7883 Licence # CCC1326399

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TPO Roofing

TPO is highly resistant to tears, impacts, and punctures withgood flexibility to allow for building movement. TPO’s areavailable in white, light gray, and black with thicknesses of either45 mils (.045”) or 60 mils (.060”). The width of the membranedepends on the manufacturer but they usually come inwidths of six to six-and-a-half feet and are one-hundred feetin length.

TPO membranes are installed fully-adhered, mechanicallyattachedor ballasted. Fully-adhered means that the roofis “glued” to the substrate using a special adhesive. Whatactually happens is the glue creates a chemical bond with themembrane. Ballasted simply means the membrane is looselaid over the top of the roof, sealed at all penetrations andaround the perimeter, and then a ballast is put on it to hold itin place. Ballast usually consists of smooth, round, river rock2” - 3” in diameter and is applied at a rate of 1,000 to 1,200pounds per roof square (100 sq. ft.). Sometimes concretepavers are used in their place. These average 20 pounds persquare foot. Mechanically-attached membranes are those thatuse some type of special screw-type fastener to secure it. Thetype of fastener will depend on the type of substrate but allfasteners are generally screw-type fasteners.

Properly installed TPO roof systems have service lives rangingfrom about 10 to 20 years, depending on the type of installation.Full removal of the existing roof, the amount of slope theroof has, weather conditions, as well as several other criteriacontribute to the longevity of a roof’s service lifeHot Mop Mostly seen in commercial applications, hot moppedasphalt roofing is sometimes applied to flat or semi-flatresidential roofs that have good access and proper drainage.

Asphalt’s advantage is that it is less expensive than other roofingmaterials and holds up fairly well when properly applied.The technique results in a roof that’s not very pretty, althoughin residential use it is often covered with a layer of decorativestone to improve the appearance. You’ve no doubt noticedroofing projects that use this technique, since it requires alarge kettle of melted asphalt. When being applied, the hotmixture releases extremely high levels of smelly air pollutants.In addition to being unpleasant, the hot asphalt poses ahealth risk to installers. Because its fumes contribute to smog,hot mopped asphalt may be restricted in some urban areas.

Thermoplastic single-ply roofing membranes are among the fastest growing commercial roofing products and have gained broad industry acceptance for their many performance and installation advantages. As demand increases for heat-reflective and energy efficient roofing systems, thermoplastic polyolefin (TPO) single-ply roofing membranes continue to provide exceptional resistance to ultraviolet, ozone and chemical exposure.

TPO (thermoplastic polyolefin) roofing membranes have been available for over 10 years. TPO roofs are gaining in popularity for new construction and as the replacement roof of choice.

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Installation

TPO membranes are single-ply roof membranes constructed from ethylene propylene rubber. They are 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, 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. Seam strengths are reportedly 3 to 4 times those of EPDM's adhesive and tape seams. 

TPO is highly resistant to tears, impacts, and punctures with good flexibility to allow for building movement. TPO's 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 six-and-a-half feet and are one-hundred feet in length