Turnkey Roofing Contractors 
Jul 23, 2026 
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Residential License # 890459
Commercial License # 3667
Residential License # 890459
Commercial License # 3667
TPO, EPDM, and PVC are the three most common single-ply membranes used on low-slope commercial roofs, and each one handles heat, chemicals, and seams differently. TPO offers strong reflectivity and heat-welded seams at a moderate price, EPDM brings decades of proven weather resistance in an affordable rubber sheet, and PVC stands up best to grease, chemicals, and ponding water. The right choice for a commercial building comes down to roof exposure, budget, and what actually happens on that roof day to day.
Choosing between TPO vs EPDM vs PVC is one of the first decisions a commercial building owner faces when it’s time for a new low-slope roof. All three are single-ply membranes, installed as one continuous layer instead of older built-up asphalt systems. But the materials behave very differently once they’re exposed to sun, summer heat, and the occasional grease vent or rooftop unit. Picking the wrong one can mean a shortened roof life, higher cooling bills, or a membrane that fails years before its warranty runs out.
TurnKey Roofing Contractors works with property managers and business owners across Greater New Orleans who need a straight answer about which single-ply system fits their building. The team installs and repairs TPO, EPDM, and PVC roofing systems on retail centers, warehouses, offices, and restaurants throughout the region. Here’s how the three membranes compare.
TPO (thermoplastic polyolefin) is a single-ply membrane made from polypropylene and ethylene-propylene rubber, installed in wide sheets with heat-welded seams. It’s the most widely installed commercial membrane in the U.S. because it pairs a reflective white surface with moderate material cost. TPO works best on roofs where energy savings and upfront budget matter more than long-term chemical exposure.
TPO sheets typically run between 45 and 80 mil thick, with 60 mil most common on commercial installs. Because the seams are heat-welded rather than taped or glued, they form a continuous bond that resists water penetration better than older adhesive-seam systems. Installers weld TPO seams in the field, speeding up large commercial jobs.
TPO’s white or light-colored surface reflects a large share of solar heat when new, which can lower cooling costs on buildings with big flat roofs. It also resists mold and algae growth better than some alternatives and holds up well to foot traffic from HVAC crews.
The tradeoff is durability under stress. Reflectivity on some TPO products drops within the first few years of UV exposure, and the material isn’t rated for sustained contact with grease, oils, or solvents. TPO works best on warehouses, retail buildings, and offices without rooftop kitchen exhaust or heavy chemical exposure.
EPDM (ethylene propylene diene monomer) is a synthetic rubber membrane used on commercial roofs since the 1960s, giving it the longest track record of any single-ply option. It’s typically black, though white EPDM exists, and seams are joined with seam tape or adhesive instead of heat welding. EPDM earns its reputation on flexibility and low cost.
EPDM sheets range from 45 to 90 mil, with 60 mil most common for commercial re-roofs. The material stays flexible in cold weather and resists hail impact better than thinner membranes, which matters during Gulf Coast storm season. It’s also one of the more affordable single-ply options per square, especially on large roof areas.
Where EPDM struggles is at the seams and with chemical exposure. Because seams rely on tape and adhesive bonds instead of a welded joint, they’re the most common point of failure, especially on roofs with standing water. Black EPDM also absorbs more heat than reflective membranes, adding to summer cooling loads.
EPDM fits buildings where upfront cost and impact resistance matter more than reflectivity, such as warehouses and storage facilities on a tight budget with no rooftop kitchen exhaust.
PVC (polyvinyl chloride) is a heat-welded membrane built to resist chemicals, grease, and oils that break down TPO and EPDM over time. Its seams are welded the same way TPO’s are, but the base chemistry resists restaurant exhaust, chemical storage, and standing water far longer. PVC costs more upfront but often lasts longer where those exposures exist.
PVC membranes run 50 to 80 mil thick, with 60 to 80 mil common on commercial jobs. Like TPO, PVC sheets are heat-welded, but the resin is chemically inert to animal fats, vegetable oils, and many solvents, so seams don’t break down like an adhesive-bonded seam can. That makes PVC the standard choice for buildings with rooftop kitchen exhaust.
White PVC also reflects solar heat effectively, similar to TPO, giving buildings both chemical resistance and energy savings in one membrane. It handles ponding water better than EPDM or TPO because welded seams stay sealed under repeated wet-dry cycles.
The main downside is price. PVC typically costs more per square than TPO or EPDM, which is hard to justify on a building without grease, chemical, or drainage exposure. Restaurants and roofs with recurring ponding water justify that higher price tag.
The right membrane depends on what happens on your roof, not just budget. Buildings with kitchen exhaust, chemical storage, or drainage problems need PVC’s chemical resistance. Buildings needing low upfront cost and storm resistance often do well with EPDM. Buildings chasing energy savings on a moderate budget usually land on TPO.
Here’s a quick side-by-side comparison of the three membranes:
| Membrane | Seam Type | Typical Thickness | Reflectivity | Typical Lifespan | Best Suited For |
|---|---|---|---|---|---|
| TPO | Heat-welded | 45-80 mil (60 common) | High when new | 15-20 years (up to 25+ premium) | Warehouses, retail, offices |
| EPDM | Taped/adhesive | 45-90 mil (60 common) | Low to moderate | 20-30 years | Budget re-roofs, hail-prone buildings (no chemical exposure) |
| PVC | Heat-welded | 50-80 mil (60-80 common) | High (white) | 20-30+ years (longer under exposure) | Restaurants, industrial sites |
A commercial roofing evaluation looks at roof exposure, drainage, and rooftop equipment, not just square footage.
No matter which membrane you’re leaning toward, the age and condition of your existing roof deck matters too. A roof showing early wear might be a better candidate for a coating than a full tear-off, covered in our breakdown of how roof coatings extend roof life.
Material price differences between TPO, EPDM, and PVC are only part of the cost; labor, roof size, and tear-off scope factor in too. See our guide to what a roof replacement costs.
Warranty coverage varies by membrane and manufacturer, so ask what’s actually covered before signing. Our article on how roofing warranties can save you money lists good questions to ask.
A simple inspection schedule catches small issues before they become leaks, especially at seams and penetrations. Our post on how often you should inspect your roof lays out a reasonable schedule for commercial properties.
For buildings weighing single-ply against other long-lasting materials, our roundup of the most durable roofing materials available compares TPO, EPDM, and PVC with metal and other commercial systems.
PVC generally performs better on roofs with standing water because its heat-welded seams stay watertight through repeated wet-dry cycles. TPO also uses welded seams, but its base material isn’t as chemically resistant, so ponding water combined with debris or oils can shorten its service life faster than PVC.
Most EPDM roofs last 20 to 30 years when properly maintained, with the membrane itself often outlasting its adhesive-bonded seams. Regular inspection of seam edges and flashing points is the best way to catch problems on an EPDM system before they turn into leaks.
TPO isn’t recommended for roofs with heavy grease or oil exposure because the material softens and loses strength when it contacts those substances repeatedly. Buildings with rooftop kitchen exhaust, like restaurants, typically need PVC instead, since its chemistry resists animal fats and cooking oils.
Heat-welded seams, used on TPO and PVC, fuse the membrane sheets into one continuous surface using hot air, creating a bond that’s often stronger than the membrane itself. EPDM typically relies on seam tape or adhesive instead, which can degrade faster under UV exposure and ponding water.
Yes, PVC membrane typically costs more per square than TPO or EPDM due to its chemical-resistant formulation and manufacturing process. That higher upfront cost is usually worth it on buildings with grease, chemical exposure, or persistent drainage issues where PVC lasts significantly longer.
Yes, white TPO and white PVC reflect more solar heat than black EPDM, which can lower cooling costs during New Orleans’ long, humid summers. Reflectivity does fade somewhat over time on any light-colored membrane, so it’s one factor among several, not the only one.
Every commercial roof carries different exposure, drainage, and budget needs, and the right single-ply membrane should match all three. Contact TurnKey Roofing Contractors to walk through your building’s roof and get a straight recommendation, or call 504-688-7397 to talk with a commercial roofing team member today.
