Monday, August 6, 2012
Preserve and restore single-ply TPO roofs with reflective roof coatings
TPO, or thermoplastic polyolefin, single-ply roof systems are durable and fairly energy efficient, cost effective and easy to install. TPO-based products have been available since the 1980s, and the first sheets for membrane roofing were introduced in 1989. By 1993, the earlier non-reinforced membranes were replaced by fabric-reinforced sheets, which is what is available today. It is the fastest-growing segment of the membrane roofing market.
But high heat and solar loading can cause premature failure in single-ply roofs. Another issue is moisture below the roofing membrane, causing debonding and curling of insulation and cover boards, loss of thermal performance and compressive strength, mold growth, and deterioration of the structural roof deck and roof structure. One other issue is the cost and landfill impact of tear-off when it comes time to replace an aging TPO single-ply roof system. The entire system must be removed and completely replaced once it has reached its useful life.
Applying a white roof coating to a new or existing TPO roof reduces the heat load on the membrane and the building, and significantly prolongs the roof system's service life. White roof coatings have an initial solar reflectance of 80% or higher, keeping the roof surface near ambient temperature to reduce your energy bills.
Installation begins with power washing to clean the roof. Next, a primer is applied to the entire roof surface. Seams are reinforced with base coat and fabric, and finally the white top coat is applied.
Coatings also reflect UV rays, which protects the membrane, preserves elasticity & flexibility, and provides a protective barrier - all contributing to fewer leaks, extended service life, and reduced life cycle cost of your roof. Recent improvements in coating adhesion technology in addition to the need for enhanced solar reflectance have created an even greater opportunity for home and building owners to have restoration coating systems installed, avoiding tear-off and replacement of aged TPO roofs.
So before you replace your aged TPO roof, consider getting a quote from a professional roofing contractor who specializes in single-ply roof restoration coatings for a more affordable, more energy efficient, more environmentally friendly, more sustainable, and faster-to-install alternative to re-roofing.
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