TPO and PVC are single ply roof membranes that are engineered to provide durable and long lasting roof systems. The manufacturers’ warranties for these systems range from 10 to 30 years. TPO is the fastest growing low slope roofing product on the market. TPO (thermoplastic Polyolefin) is a flexible light weight material that is a combination of rubber and vinyl and all the seams are hot air welded. It is available in 45, 60, and 80 mil. in thickness and is comprised of three layers - A TPO Polymer base, A strong polyester or fiberglass reinforced center, and a durable Thermoplastic Polyolefin compounded top ply. PVC (Polyvinyl Chloride) is also known as a vinyl roof and is typically reinforced with fiberglass mats or polyester. Both TPO and PVC roof systems are highly resistant to tears, impacts, punctures, and are algae resistant. These roof products contain colorants and flame retardants and come if a variety of colors, with white being the most popular. The white roof is considered to be a “cool roof” as it is an energy efficient product that reflects the suns heat. TPO and PVC roofs are environmentally friendly and recyclable products.
There are three standard application methods for TPO and PVC Roofing:
- Fully Adhered – this system requires using a solvent or water based adhesive to adhere the rubber to the substrate or insulation board.
- Mechanically Fastened – This method is done by attaching the membrane to the deck using mechanical fasteners along each loose edge of the material.
- Loose Laid / Ballasted – this application is done by fastening the perimeter of the membrane and then the roof is covered with gravel to secure the loose laid sections into place.