Tpo on the other hand is inherently flexible and doesn t have plasticizers in it.
Pvc roofing membrane problems.
Plant roots fungi and bacteria have no negative effect on a pvc membrane.
All roof products deteriorate over time and pvc has a tendency to shrink pulling the seams lifting corners and potentially causing leaks.
Hot air welding creates a permanent physical bond between the sheets that is actually stronger than the membrane itself making pvc roof installation fast and ensuring that critical areas are permanently watertight.
Older pvc roofs in cold weather are prone to shattering.
Also exposure to plant roots fungi and bacteria have no negative impact on a pvc roofing membrane.
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.
Pvc on the upper end of the price spectrum there is pvc roofing.
The membrane stands up to constant dampness ponding water as well as high and low alkaline conditions.
It is a white reinforced membrane with welded seams and flashings.
A pvc roofing membrane is highly resistant to constant dampness ponding water as well as high and low alkaline conditions.
And the reason why pvc membranes are most often heat welded at the seams is because of the strength durability and stability of the material itself which unlike tpo is very difficult to heat weld properly because of the inferior quality of the membrane.
Pvc s are documented to last longer than tpo membranes who are still experiencing premature failures.
Gaf everguard tpo is a proven membrane and the 60 mil version is a good all around choice.
Ib pvc flat roof installation.
Also manufacturers strongly advise against installing epdm in the winter because glue freezes and the roof may leak.
Reported problems included seams coming apart leaks and membrane failures especially when exposed to excessive heat over a prolonged period of time.
Flat roof costs in us.
The good news is that reputable manufacturers have taken care of these issues and astm standards have been critical in achieving the base line of minimal acceptable performance and features.
Moreover hot air welding also ensures that the membrane will remain pliable and will be impervious to leaks even if there are puddles of ponding water on the roof.
Pvc can last well over 30 years.
A properly heat welded seam is a much better seam than a glued or taped seam.
Good luck with your project.
A pvc roof is also resistant to uv radiation strong winds fire and chemicals.
