Illinois weather brings a mix of cold, heat, snow, and storms. Your flat roof needs to handle all of that. Two options stand out for low-slope roofs: EPDM roofing and TPO roofing. But what’s the difference between EPDM and TPO flat roofing?
Each one offers benefits. They also have limits. The best choice depends on your roof, budget, and goals. Below, we break down this TPO roofing comparison to help you decide between these two top flat roofing types.
EPDM roofing is short for Ethylene Propylene Diene Terpolymer. It’s a synthetic rubber made for tough weather. It comes in large seamless sheets—some sizes over 15' long. It can be fully adhered, mechanically attached, or ballasted.
TPO roofing means Thermoplastic Polyolefin. It’s a mix of rubber and plastic. Most TPO roofing systems are white. This helps reflect the sun and cut cooling costs in summer. Like EPDM, it’s a single-ply roof construction with different attachment methods.
Both are flexible. Both last for years. But they act differently in heat, cold, and on high-use roofs.
EPDM membranes do well in the cold. They have excellent resistance to UV rays, snow, and hail. Northern climates like Illinois are a great match. Some homeowners choose Black EPDM to melt snow faster and reduce snow load.
TPO roofing is newer. It stands up to heat and foot traffic. Its seams are heat-welded, which gives it strong protection from wind uplift and damage.
For cold and snow, EPDM roofing has a longer track record. For UV protection and summer heat, TPO roofing holds its own.
Many Illinois homeowners care about energy use. If saving on AC is a goal, TPO roofing is a top pick. Its light color reflects sunlight. This lowers roof heat and helps reduce cooling costs.
Dark-colored EPDM absorbs heat. In winter, that helps lower heating costs. It’s a good match for homes where winter bills are a concern. Some also choose white EPDM, but it's not as common.
If your main goal is summer energy savings, a TPO roofing comparison shows better results. But if you want warmth in winter, EPDM roofing is a better match.
Both roofs take about the same time to install. But how they’re put on is different.
EPDM roofing uses liquid adhesives, formulated tape, or newer tools like Quick-Applied Tape and JM EPDM FIT. It’s easy to work with, even on complex roof shapes.
TPO roofing uses heat to seal seams. This gives it a tight fit. It also pairs well with add-ons like insulating cover boards, Curb Flashing, or Hercules RetroDrain.
Many contractors like working with TPO. But EPDM roofing is still the best for odd-shaped or older roofs.
All roofs need upkeep. With EPDM membranes, patches are simple. Rubber is flexible and easy to fix.
TPO roofing takes more skill to repair. Heat tools are needed. And matching the membrane can be tricky.
Illinois weather is tough. Between snow, hail, and heat, EPDM roofing holds up well. It also handles sudden weather changes better than most.
A solid EPDM membrane can last 25 to 30 years. TPO roofing lasts about 20 to 25 years.
TPO roofing systems may cost less to install. But they might need more upkeep over time. EPDM roofing costs a bit more at first. But it often needs fewer repairs.
In Illinois, roofs face all kinds of weather. If you want something long-lasting, EPDM roofing often makes more sense.
Still wondering what the difference is between EPDM and TPO flat roofing?
Choose EPDM roofing if you need cold-weather strength, fewer repairs, and a long life span. It’s a smart choice for homes that get a lot of snow and freeze-thaw cycles.
Go with TPO roofing if energy savings matter most. Its light surface keeps your home cooler. It’s also good for buildings with high summer cooling costs.
Look at things like foot traffic, roof shape, and year-round use. Talking to design professionals or a trusted roofer will help make your decision easier.
Advanced Roofing Inc. has installed EPDM roofing and TPO roofing systems for more than 30 years in Yorkville, Naperville, Aurora, and nearby areas. We know how Illinois weather affects flat roofs.
We help homeowners and property owners decide what works best. Our team looks at your roof, budget, and energy needs. Then we guide you toward the right roofing membrane.
Whether you pick EPDM membranes with formulated tape or a fully adhered TPO roofing system, we’re here to help. Visit www.advancedroofing.biz or call to talk with our experts.
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