Single Ply Roofing
As a roofing option, Single Ply roofing in the form of TPO, EPDM and PVC, have grown in popularity in the last 30 years. They are lightweight, strong, resistant to tears and punctures, resistant to temperature and ultraviolet light. Generally having a white surface, they are very reflective, thus reducing a building’s cooling costs. Contributing significantly to energy efficiency, single ply roofing can help buildings achieve LEED Canada Green Building standards.
With so many products and designs, these are the prime choice when it comes to flat and low-slope roof installations. A single-ply roof system will meet almost any need and fit almost any budget.
About Single Ply Roofing:
Single ply roofs are divided into two groups:
Thermosets versus Thermoplastics
The easiest difference to explain is that Thermoplastics can be welded together with hot air welders while Thermosets cannot be welded and must be adhered or ballasted down to the roof.
- EPDM is a Thermoset.
- TPO is a Thermoplastic.
Thermoplastic Polyolefin (TPO)
TPO is the single ply option most commonly used at Roof Rider. TPO can be welded at the seams with hot air, mechanically fastened under the welds, adhered with a glue at edges and even self adhered (with a peel and stick capability).
Thicknesses for TPO are measured in “mils”, a unit of measure where a mil is equal to 0.001 inches. Common thicknesses for TPO are: 45mils, 60 mils and even 80 mils. The thicker membranes are used when increased impact and puncture resistance is needed.
TPO provides many of the benefits of EPDM and PVC with out the drawbacks. It is flexible, weldable, highly algae resistant, 100%.