Serving the Delaware Valley's roofing needs since 1993. 
FREQUENTLY ASKED QUESTIONS
What is TPO ?

TPO stands for Thermoplastic Polyolefin. Its a synthetic rubber compound. Unlike other rubber compounds used in the roofing industry, it possesses the ability to be fused together like a plastic PVC membrane over its life. Most other (EPDM) rubber membranes are seamed together using either 2 sided tape systems or an adhesive.


What are the advantages of a fused seam over tape systems ?

Hot air welded seams have proven to be the most reliable seam in the market today. Fused seams are 6 times stronger than glued seams and three times stronger than tape systems. Once fused together, the TPO lap forms a monolithic homogeneous rubber roof system over the entire field of the roof. Seams are impossible to deteriorate. And in roof systems where seams are always the weakest link in the system, its reassuring to know that the laps are its strongest component.

Please visit the pictures page to see a typical TPO seam prior to fusing as well as the mechanical unit ( the Leister) used to heat and fuse the seam together. Compare it to the tape systems you'll see on the page too.

What are other advantages of the TPO systems?

While TPO can be manufactured in colors, the most obvious choice for the TPO membrane is white. It offers a reflective quality rarely found in roof systems, reflecting close to 87% of the sun's damaging UV rays OFF the roof. The roof membrane stays close to ambient air temperature, which means heat is NOT absorbed in the roof membrane and transmitted into the interior of the building. If your facility is air conditioned, it lightens the load put on air conditioning units and reduces air conditioning costs.

The TPO membrane is also reinforced with a polyester scrim reinforcement, which offers greater puncture and tear resistance than conventional black EPDM membranes.

What type of systems are available with TPO membranes ?

TPO can be installed in mechanically attached, fully adhered, and ballasted type applications. The most prevalent is the mechanically attached roof system.


Can TPO be installed over an existing roof system ?

TPO is not the cure all for all roof problems. Good roofing practices still apply when considering even a tough TPO membrane. Any wet insulation in the existing roof system should be removed prior to ANY new roof system installed, including TPO. But once all the existing insulation and decking has been inspected and approved, a TPO system can be installed after an insulation board has been applied over an existing built up roof system or other single ply membrane.

Why should I choose Commercial Roofing Systems, Inc. over other contractors when looking for a TPO applicator to install a roof on my facility ?

Commercial Roofing Systems Inc. specializes in the application of TPO membranes. In nearly 15 years of operation, 95% of all its clients have chosen the white hot air welded roof system over black EPDM and built up roofs.