Pvc Roofing 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.

Pvc roofing failures.

Part 1 general 1 1 summary. All roofing areas flashings penetrations and equipment shall be included in the work under this section. A pvc roof is the best choice for low and. Pvc s are documented to last longer than tpo membranes who are still experiencing premature failures.

It is very easy to repair by welding a patch or re welding seam voids. Punctures can also occur because of debris left blown or tossed on the roof. It is a white reinforced membrane with welded seams and flashings. 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. Thermoplastic membrane pvc roofing july 2017 07 54 19 1 thermal and moisture protection. Older pvc roofs in cold weather are prone to shattering. Pvc roofing membranes continue to be the leading product in both commercial and residential flat roofing market.

Pvc can last well over 30 years. Many in service membranes have survived category 3 hurricanes. One frequent trouble spot is moisture getting below the roofing membrane. Pvc roofing membranes maintain their flexibility because the formula contains plasticizers as well as salt derived from chlorine the disadvantage of this formula is that with time these plasticizers tend to break down weakening the membrane so that it requires maintenance and repair in order to remain in tact and resistant to leaks.

The most preventable failure symptom punctures usually occur because of carelessness on the part of people visiting the roof. Every ten thousand feet of roof would have approximately 15 000 lineal feet of potential seam failure. The membrane is reinforced which ensures dimensional stability and prevents shrinking or cracking with. All roof products deteriorate over time and pvc has a tendency to shrink pulling the seams lifting corners and potentially causing leaks.

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. Because of their inherent strength as well as heat welded seams pvc roofs have superior wind uplift resistance. 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. Section 07 54 19 single ply pvc reroofing.