Good luck with your project.
Pvc roofing membrane problems.
Gaf everguard tpo is a proven membrane and the 60 mil version is a good all around choice.
Pvc on the upper end of the price spectrum there is pvc roofing.
Heat causes faster loss of the plasticizers that are used in pvc to make it flexible.
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.
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.
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.
A pvc roofing membrane is highly resistant to constant dampness ponding water as well as high and low alkaline conditions.
The membrane stands up to constant dampness ponding water as well as high and low alkaline conditions.
Reported problems included seams coming apart leaks and membrane failures especially when exposed to excessive heat over a prolonged period of time.
Ib pvc flat roof installation.
It is a white reinforced membrane with welded seams and flashings.
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.
Also manufacturers strongly advise against installing epdm in the winter because glue freezes and the roof may leak.
Tpo on the other hand is inherently flexible and doesn t have plasticizers in it.
A properly heat welded seam is a much better seam than a glued or taped seam.
A pvc roof is also resistant to uv radiation strong winds fire and chemicals.
Pvc can last well over 30 years.
Pvc s are documented to last longer than tpo membranes who are still experiencing premature failures.
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.
Plant roots fungi and bacteria have no negative effect on a pvc membrane.
Pvc roofs are distinguished by the way they are put together using hot air welding fusion welding of the seams.
All roof products deteriorate over time and pvc has a tendency to shrink pulling the seams lifting corners and potentially causing leaks.
