Tpo Roof Failure

With commercial roofs one of the more common tpo roofing problems is that there is a high volume of foot traffic when compared to other types of buildings or roofing structures. Tpo also lost its competitive advantage by using peel stick flashing. Dict tpo membranes abilities to withstand conditions in high heat regions of the u s.

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Tpo roof failure.

The data show that when either mode of failure cracking or weight loss is considered the best performing tpo membranes are by far gaf everguard extreme 60 mil and gaf everguard extreme 50 mil neither of which failed until over 190 days. At 1 66 per square foot generic tpo is 13 more expensive than high quality brand name pvc so the price war is lost. Answer is no for pretty much and singly ply roofing material. Tpo f tpo e tpo d tpo c tpo b 50 mil tpo a days to failure at 275 f time before failure begins 1 5 wt.

Loss or cracking years 160 f years 195 f 10 20 30 40 10 20 30 40 31. Each type of failure blisters splits and punctures to name a few typically results from a specific cause. Poor design for example can lead to splits and debris can cause punctures. While many tpo roofs are performing as promised there have been complaints about seam failures and cracked membranes over the last few years.

One of the major issues with tpo roofs has been premature aging and seam failures due to prolonged exposure to intense heat. The salesperson s statement about the long term warranty on the roof claimed to be as long as 12 years should be set aside and disregarded since material failure is rare and proof of such failure on a tpo roof is practically impossible to prove. Degrading adhesives proper tpo roofing installation ensures its durability and longevity. The way a roof wears the bumps and wrinkles it bears can show a lot about why it is failing.

It s no longer a truly heat welded system but is a hybrid of welded plus glued roof. In february the midwest roofing con tractors association s mrca s technical and research committee issued an advi sory bulletin that raised a possible correla tion between some reported problems with localized high heat deterioration of tpo. These membranes are in a performance class unmatched by any other tpo membrane. Direct contact with modified bitumen will in short time damage tpo pvc epdm membranes both physically rubbing against granules and chemically asphalt bitumen with damage the single ply material.

Membrane failures were particularly frequent in the states that experience the most heat and uv radiation all year round. Now tpo is more like epdm rubber with heat welded field seams.