Pvc Roofing Failures

Thermoplastic membrane pvc roofing july 2017 07 54 19 1 thermal and moisture protection.

Pvc roofing failures.

Older pvc roofs in cold weather are prone to shattering. All roof products deteriorate over time and pvc has a tendency to shrink pulling the seams lifting corners and potentially causing leaks. A pvc roof is the best choice for low and. As noted in the chart below created from rs means data if you compare the life cycle costs of a sarnafil roof estimated to last 35 years versus a tpo roof lasting 20 years pvc is the less expensive choice.

The most preventable failure symptom punctures usually occur because of carelessness on the part of people visiting the roof. When that happens it can cause significant damage to roofing systems including debonding and curling of insulation and cover boards loss of thermal performance and compressive strength and deterioration of and mold growth on moisture sensitive and organic materials. Because of their inherent strength as well as heat welded seams pvc roofs have superior wind uplift resistance. Part 1 general 1 1 summary.

Pvc can last well over 30 years. Pvc s are documented to last longer than tpo membranes who are still experiencing premature failures. So if any liquids are used within the building they will cause condensation between the roof steel and thermo plastic membrane and its insulation. Many in service membranes have survived category 3 hurricanes.

To get a better sense of why pvc is a superior roofing system besting its competitors in quality durability and longevity it is important to know a brief history and evolution of pvc roofing membranes. Hvac technicians window washers painters maintenance staff smokers and tenants. Section 07 54 19 single ply pvc reroofing. Pvc roofing membranes continue to be the leading product in both commercial and residential flat roofing market.

Every ten thousand feet of roof would have approximately 15 000 lineal feet of potential seam failure. Pvc on the upper end of the price spectrum there is pvc roofing. One frequent trouble spot is moisture getting below the roofing membrane. It is very easy to repair by welding a patch or re welding seam voids.

All roofing areas flashings penetrations and equipment shall be included in the work under this section. It is a white reinforced membrane with welded seams and flashings. Pvc roofing membranes have passed fm and ul fire testing and have an unlimited slope approval. The epdm tpo pvc roof system would have a heat welded seam.