PVC Roofing Systems
PVC membranes have superior durability, suiting them for a long service-life. The heat-fused seams are as strong as the base sheet itself. The material and seaming process makes it advantageous for roofs with multiple penetrations. Walkpads, made from recycled PVC, can be used to increase resistance to punctures (Griffin & Fricklas, 2006).
A plasticizer added to PVC membranes now has reduced the risk of shattering. This was a risk of some PVC compounds in the 1970s, which jeopardized the reputation of all brands. Now shattering is confined to older, thinner, unreinforced PVC membranes. This low risk is now further reduced by the thicker PVC sheets (45, 50, and 60 mil). The plasticizer loss occurs more readily in thinner sheets of PVC due to a shorter distance between core to surface for the plasticizer migration. LaFerney Commercial Roofing offers a reinforced PVC membrane from a manufacturer who has documented roofs still in service for over 30 years (Griffin & Fricklas, 2006).
LaFerney Commercial Roofing, with its more than 35 years of experience, has found single-ply PVC membrane roofing systems to perform well for most commerical uses in the Southeastern United States. With the inclusion of halogen atoms, the PVC system offers high fire retardation. The reflectability makes for a "cool roof." This durable roofing system is now available in a variety of colors and some patterns for the aesthetic appeal of stone or shingles.
Griffin, C. W., & Fricklas, R. L. (2006). Manual of low-slope roof systems. (4th ed.). New York: McGraw-Hill.