Polyvinyl Chloride (PVC): PVC sheets are prepared by calendaring, extruding and reinforcing mats with glass fiber. This roofing contains plasticizers as well as stabilizers and many other additives in order to enhance flexibility and other needed physical properties. There are a few membranes in this category that are even made with fleece, which is non-woven and placed at the side of the sheet.
Key features of PVC thermoplastic membrane sheets: They are available in widths ranging from 6 feet to about 12 feet. Available sheet thickness ranges from 45 mils to 90 mils. The seams are completely sealed with the use of heat or any type of chemical welding during installation. PVC membranes come in using different colors, most commonly gray and white.
PVC Alloys or Compounded Thermoplastics: This type of membrane is a made of several compounds, the most notable of which are:
- Copolymer Alloy (CPA)
- Ethylene Interpolymer (EIP)
- Nitrile Alloys (NBP)
- Tripolymer Alloy (TPA)
Thermoplastic Olefin (TPO): Thermoplastic Polyolefin (TPO) is basically a single-ply roofing membrane which is again made out of polypropylene as well as ethylene-propylene rubber polymer. This type of roofing membrane gets installed with mechanical systems, allowing the white membrane to stay exposed for the complete tenure of the roof. Sheets of TPO consist of colorant, UV absorbers, flame retardants and other proprietary substances. It is available in sheet widths ranging from 6 feet to about 12 feet and having thicknesses ranging from 40 mils to 100 mils. Seams are sealed by the use of heat which is welded with hot air. In most cases, TPO membranes are found in white.
Chlorinated Polyethylene (CPE): CPE is the standardized acronym for thermoplastic chlorinated polyethylene elastomer. It is produced via chlorination of the polyethylene. The content of chlorine can contribute as much as 70%, weight wise, but commonly used sheets of CPE have grades of chlorine ranging between 25% to 42%.
It wouldn’t be surprising that the above types of thermoplastic membrane roofing sound complicated to you. Our experts are available to guide you in making the right selection of thermoplastic roofing for your Sacramento property.