TPO membranes reflect more sunlight and reduce cooling costs, while EPDM absorbs heat but performs well in all seasons.

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Thermoplastic polyolefin membranes are bright white, which reflects up to 80 percent of solar radiation. This keeps the roof surface and building interior cooler during Asheville's warm summers. Lower interior temperatures reduce air conditioning load and energy expenses. Commercial buildings with large roof areas see the greatest benefit from TPO's reflective properties.

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EPDM, or ethylene propylene diene monomer rubber, is typically black and absorbs heat. While this may seem like a disadvantage, EPDM's thermal properties can benefit buildings in colder months by allowing some passive solar gain. For warehouses or workshops with minimal cooling needs, EPDM's lower material cost may outweigh energy savings from TPO. Plastic membrane roofing services in Asheville include both TPO and other thermoplastic options tailored to each building's energy profile.