Many common beliefs about EPDM roofing are outdated or simply wrong: EPDM isn’t cheap or flimsy, it doesn’t always look like a plain black rubber sheet, it isn’t prone to constant leaks, and it isn’t only for huge commercial buildings — in reality, EPDM is a durable, long-lasting, cost-effective membrane that performs well on flat and low-slope roofs, including in Wyoming’s climate. These myths lead property owners to overlook a proven system. Below, we set the record straight. Pete’s Builders installs and repairs EPDM and other commercial roofing across Cheyenne, Laramie, and Scottsbluff, serving the area since 2015 with an A+ Better Business Bureau rating.
What is EPDM roofing?
EPDM (ethylene propylene diene monomer) is a synthetic rubber single-ply membrane used on flat and low-slope roofs. It’s one of the most widely used commercial roofing systems in the world, valued for its durability, weather resistance, and long service life. Understanding what EPDM actually is helps clear up the misconceptions that surround it — because most EPDM myths come from outdated information or confusion with lower-quality materials.
Myth 1: EPDM is cheap, low-quality roofing
The truth: EPDM is cost-effective, but that doesn’t mean low quality. It’s a proven, durable membrane with decades of successful use on commercial buildings worldwide. Its affordability comes from efficient manufacturing and installation, not inferior materials. A quality EPDM roof, properly installed and maintained, delivers reliable, long-lasting protection — strong value rather than a cheap compromise.
Myth 2: EPDM roofs leak constantly
The truth: A properly installed EPDM roof is highly watertight. When EPDM leaks, it’s almost always due to poor installation, aging seams that weren’t maintained, or damage — not a flaw in the material itself. With correct seam work, proper drainage, and regular maintenance, EPDM stays reliably watertight for many years. Like any roof, it needs professional installation and upkeep to perform, and when it gets both, leaks are the exception, not the rule.
Myth 3: EPDM only comes in ugly black
The truth: While black EPDM is common, the membrane is also available in white and other reflective options. White EPDM reflects sunlight, which can improve energy efficiency by reducing heat absorption — useful under Wyoming’s intense sun. So appearance and energy performance aren’t limited to a single plain black sheet; there are options to suit different buildings and efficiency goals.
Myth 4: EPDM doesn’t last long
The truth: EPDM is actually known for its longevity. A quality EPDM roof, properly installed and maintained, can last for decades — one of the reasons it’s so widely used. Its rubber composition remains flexible across temperature swings and resists weathering. The roofs that fail early are typically those that were poorly installed or never maintained, not a reflection of the material’s real lifespan.
Myth 5: EPDM is only for large commercial buildings
The truth: While EPDM is popular on large commercial roofs, it works well on any flat or low-slope roof, including smaller commercial buildings and low-slope residential sections. Its durability and cost-effectiveness make it a practical choice across many building types, not just big-box structures.
Myth 6: EPDM can’t handle cold or hail
The truth: EPDM’s rubber composition actually gives it good flexibility in cold temperatures, and it holds up well through freeze-thaw cycles — relevant in Wyoming’s winters. While no membrane is immune to severe hail, EPDM is durable and, when damaged, is relatively easy to repair. Proper installation and maintenance keep it performing through the region’s weather extremes.
Why do these myths persist?
Most EPDM myths come from three sources: outdated information from decades ago, confusion between quality EPDM and cheaper or poorly installed roofing, and failures caused by bad installation being blamed on the material. The reality is that EPDM, like any roofing system, performs based on the quality of the product, the installation, and the maintenance. Given a quality membrane, professional installation, and regular upkeep, EPDM is a durable, cost-effective, long-lasting choice — which is exactly why it remains one of the most trusted commercial roofing systems.
Why choose Pete’s Builders?
Pete’s Builders installs and repairs EPDM the right way — with proper seam work, drainage, and detailing that let it deliver its full lifespan — backed by commercial roofing expertise, licensed and insured crews, an A+ Better Business Bureau rating, and a track record since 2015. The team gives honest advice on whether EPDM or another system best fits your building. Service covers Cheyenne, Laramie, Scottsbluff, and surrounding communities.
How does EPDM compare to other flat roofing options?
Seeing EPDM alongside the alternatives helps put the myths to rest and shows where it genuinely fits. Compared with TPO, another popular single-ply membrane, EPDM is a rubber material prized for durability and longevity, while TPO is a reflective thermoplastic with heat-welded seams and strong energy efficiency — both are excellent, and the better choice depends on the building’s priorities. Compared with PVC, EPDM is more economical, while PVC adds superior chemical and fire resistance for demanding environments like restaurants. Compared with older built-up (tar-and-gravel) roofs, EPDM is lighter, faster to install, and easier to repair. And compared with modified bitumen, EPDM offers single-ply simplicity versus modified bitumen’s multi-layer redundancy. The honest takeaway is that EPDM isn’t the “budget” or “lesser” option the myths suggest — it’s a proven, competitive system that holds its own against every alternative, with particular strengths in durability, longevity, cold-weather flexibility, and easy repairability. For many Wyoming buildings, those strengths make it an excellent fit, especially given the region’s temperature swings and freeze-thaw cycles. The right way to decide isn’t to rely on reputation or myth, but to have a knowledgeable contractor assess your specific building, its use, and your budget, then recommend the system — EPDM or otherwise — that will actually perform best and deliver the most value over its lifetime.
Frequently asked questions
Is EPDM roofing good quality?
Yes. EPDM is a proven, durable single-ply membrane used worldwide on commercial roofs. It’s cost-effective due to efficient manufacturing and installation, not because it’s low quality, and it delivers reliable, long-lasting protection when properly installed and maintained.
Does EPDM roofing leak easily?
No. A properly installed and maintained EPDM roof is highly watertight. Leaks almost always result from poor installation, unmaintained aging seams, or damage — not the material itself.
How long does an EPDM roof last?
A quality EPDM roof, properly installed and maintained, can last for decades. Its longevity is one of the main reasons it’s so widely used. Poor installation or neglect, not the material, causes early failures.
Does EPDM come in white or only black?
EPDM is available in white and reflective options as well as black. White EPDM reflects sunlight and can improve energy efficiency, which is useful under Wyoming’s intense sun.
Is EPDM a good choice for my building?
EPDM works well on flat and low-slope roofs of many sizes. Call Pete’s Builders at (307) 514-5489 for honest advice on whether EPDM or another system best fits your building.
Considering EPDM for your flat roof? Get the facts
Don’t let outdated myths steer your decision. Pete’s Builders gives you honest advice and expert EPDM installation. Call (307) 514-5489 or visit 1816 Central Ave, Cheyenne, WY 82001 today.