Non-reinforced or scrim reinforced membranes can also be used. The membrane is then attached using fasteners to the underlying steel deck. If your commercial building project is in an area which typically receives a significant number of hailstorms, EPDM is the way to go. Its synthetic rubber surface will essentially bounce the hail off with little to no damage to the roof surface or system.
TPO systems, on the other hand, which are made of thermoplastic, will produce concentric circles that remain in place and may compromise the membrane of the roofing system when struck by hailstones.
As mentioned above, when it is necessary to conduct repairs on an EPDM roofing system, it is somewhat easier for roofing specialists to implement them because no electrical source is needed for welding.
Also, if your commercial building has solar panels installed or if you are thinking about having them installed, you would be better off choosing EPDM because it will not interfere with the absorption of sunlight.
TPO systems reflect sunlight back off the surface and into the solar panels, which might cause them to fail during operation.
Choosing one roofing system over the other may depend on your geographic location, as well as considering heat, hail, rain, snow, or other external factors, such as your intent to mount solar panels on the roof, as previously noted. Other important factors are cost, longevity, durability, maintenance, ease of installation and energy efficiency. Both systems can be mechanically fastened, which is advantageous in cold weather installations like we have here in the Midwest, but they can also be fully adhered systems, which is the best approach for the sake of durability and warranty usage.
EPDM roofs are the most economical choice for single ply roofing membranes. Regardless of which membrane you choose, it is better to spend more money and invest in a thicker membrane.
By far the most important aspect that will determine the longevity of a single ply roofing membrane is the method by which the overlapping seams have been attached together.
It is difficult to determine the longevity of TPO roofing membranes for a couple of reasons. First, this is a new roofing product and there are no TPO membranes in the U. Second, TPO membranes continue to be an experimental product. They are all in their 2nd, 3rd and in some cases 4th generation of formulations, so it is not possible to definitively say how long any of these will last. Also, some TPO products have been pulled off the market in the past for seam and material failures.
An EPDM roof has a solid reputation for durability. Made of rubber compound, EPDM roofs have been on the market for decades. Having properly tapered seams and detailed flashings, an EPDM roof will last up to 25 years. It is a dependable roofing material that offers resistance against ultraviolet light, ozone, oxidants, and severe weather conditions.
However, because of continuous changes and improvements to the formulation, different TPO membranes perform differently. TPO is known to respond poorly to ponding water, causing splits and cracks, and does not have strong resistance to high thermal and solar overload.
In the beginning of its service life, a properly installed EPDM membrane will not require much maintenance. You can restore an EPDM roof with a silicone restoration system as well, the only difference is that you will need to use a primer first. The good news is that the primer can be sprayed on and power washed off in about 15 minutes. The first option is to mechanically fasten the EPDM roof down. Since the previous EPDM was ballasted, there is nothing holding that rubber down. In this case, a roofing contractor would remove the gravel, cut the flashings, cover the field of the roof with a cover board, and install a spray foam roofing system.
The second option is to remove the gravel, wash the remaining EPDM roof, fasten it down, and then install a silicone restoration membrane system. When being installed, TPO roofing systems are always welded, making the system extremely durable, but on the contrary, can also complicate installation because welding requires an electrical source. For this same reason, any repairs which might become necessary for a TPO system are harder to implement because electricity will be required to do the repair work.
If your commercial building is located in an area which typically receives a significant number of hail storms, EPDM is the way to go. Its synthetic rubber surface will essentially bounce the hail off with little to no damage to the roof surface or system. TPO systems, on the other hand, are made of thermoplastic, and when struck by hailstones will produce concentric circles that remain in place, and may compromise the membrane of the roofing system.
TPO systems reflect sunlight back off the surface and into the solar panels, which might well cause them to fail during operation. Both of these roofing systems are excellent at protecting your commercial building and the contents inside your home. Choosing one over the other may depend on your geographic location, taking into account heat, hail, and rain, or it may depend on external factors, such as your intent to mount solar panels on the roof.
Both of these systems can be mechanically-fastened, which is advantageous in cold weather installation. Both also have the ability to be fully-adhered systems, which is the best approach for the sake of durability and warranty usage. Your business deserves high quality commercial roofing in Denver, CO.
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