FAQ - Frequently Asked Questions

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 Green Roofing and Waterproofing over other contractors when looking for a TPO applicator to install a roof on my facility?

Green Roofing and Waterproofing specializes in the application of TPO membranes. We have the trained staff and supervision to provide a professional leak-free installation. In the 10 years of operation, 95% of all our clients have chosen the white hot air welded roof system over black EPDM and built up roofs.

What are the advantages of a white roofing system?

A white roof surface reflects sunlight, keeping it up to 20% cooler than a black roof. If lowering your cooling costs is a concern, then a white roof may help. Some larger cities are making white roof surfaces a requirement to help offset heat generated by asphalt pavement and concrete structures.

What applications are suitable for EPDM membrane?

EPDM membrane can be used for low and steep slope roofing, as well as unusually shaped structures (such as domes, barrels and other geometrically shaped roofs) due to its versatility. The membrane can be adhered, mechanically fastened, or loose laid. It can be installed above or below insulation (i.e., an IRMA application), and can also be used in below grade waterproofing applications. Green Roofing and Waterproofing is certified in applying and repairing EPDM, but specializes in and recommends TPO application. EPDM is thin and most commonly single-ply. While there are some disadvantages, EPDM roofs do tend to be less costly and are also environmentally friendly as most are made out of recycled materials. These rubber roofs have been known to expand as well as shrink with the building. EPDM can be installed by mechanical fastening, full adherence or ballasting. Rubber roofs can be reusable if they are mechanically applied or ballasted. The average lifespan of an EPDM rubber roof is 15 years. Green Roofing and Waterproofing, has the experience in both TPO and EPDM roofs and is happy to recommend and explain which roof option would be best for your specific roof repair or replacement. Call today and we will come out to give you a free estimate!