Several bad pvcs most of the hypalon products and tpo which at that time was a very new product to the market so new that most manufacturers actually called it tpa thermo plastic alloy since they would routinely change the core supplier ingredients and percentages of each component.
How to tell the difference between tpo and pvc roofing.
It instantly became very popular as it was economical and cost efficient.
Two of the hardest flat roof systems to tell apart is the pvc roof and the tpo roof both are white heat welded systems that look virtually identical.
Polyvinyl chloride pvc used since the 1960s pvc membranes are popular for their easy installation and cheap cost.
The primary difference is that tpo has been on the market for only about 20 years and has a history of material failures recalls and formula updates while pvc has enjoyed a solid reputation in the roofing industry for over 30 years.
Tpo is thin compared to other membranes usually around 1 1 2 millimeters in thickness.
It is typically white in color and has a rubbery feel.
Tpo is the most popular rv roofing material today because of two reasons it is cheap and it is already colored white.
However while the face of both membranes and their installation are virtually identical they are very different systems on the inside.
When being attached to the roof material it is either nailed or glued on.
Tpo which is short for thermoplastic polyolefin came into the roofing market in the early 1990s as a viable alternative to pvc roofing materials.