What is PVC Roofing?
PVC roof is a single-ply membrane that consist of two plies or layers of PVC material with a polyester reinforcement scrim between the layers. Top ply has special additives to make the membrane UV stable, prevent curing, plasticizers to make it flexible and pigments for color. IB also uses a layer of acrylic coating to make their roof more reflective and to repel dust and dirt. Bottom ply is a black PVC with plasticizers for flexibility and usually no other additives or fillers. PVC roofs are put together by using hot-air welding (fusion welding) of seams, which creates a permanent physical bond between two separate sheets of roofing membrane. This hot-air welding is what makes PVC roofing such a great roofing product – it can remain water-tight and pliable for decades after it was originally installed. Negative side of PVC: Greenpeace, toxic waste and dioxins, plasticizers, etc. According to Greenpeace, during PVC production, use, disposal and/or accidental burning, numerous dangerous
