EPDM rubber roofing for Tulsa commercial buildings.
EPDM has been the workhorse of commercial flat roofing for 50 years. Not because it is trendy. Because it works. Flexible in Oklahoma cold snaps, resistant to UV degradation, and available in thicknesses up to 90 mil for buildings that take a beating.
Q: What is EPDM roofing and is it right for my Tulsa building?
EPDM roofing does not get the same attention as newer single-ply membranes, but it has outlasted more than a few trends. The rubber compound handles Oklahoma's dramatic temperature swings without cracking or becoming brittle. In Tulsa winters that drop to single digits and summers where rooftop surface temps hit 170 degrees, that flexibility matters.
We install EPDM on warehouses, light industrial buildings, schools, churches, and any commercial building where cost-per-square-foot is a significant factor. EPDM costs less to install than TPO on a comparable building. The trade-off is energy performance. EPDM is black, which absorbs heat. For buildings where cooling costs are not a primary concern, that trade-off is often worth making.
Modern EPDM installation has improved significantly over older systems that used adhesive-bonded seams. We use mechanically fastened, fully adhered, and ballasted installation methods depending on the building. Seam tape and splice adhesives have improved enough that seam failures, the historical weak point of EPDM, are much less common on properly installed systems.
Signs your flat roof needs attention.
Failing adhesive seams
Older EPDM systems bonded with solvent adhesive start delaminating at seams after 12 to 15 years. Open laps are the most common source of commercial flat roof leaks in Tulsa.
Membrane shrinkage at perimeter
EPDM shrinks slightly as it ages, pulling flashings away from walls and parapets. Once you see gaps at the perimeter, re-flashing alone does not fix the root cause.
Ponding water over 48 hours
Flat roofs should drain within two days of a rain event. Persistent ponding breaks down the membrane and saturates insulation. Tapered insulation with correct slope solves it permanently.
Visible surface cracking
Surface crazing on EPDM indicates UV damage and age. Once the top surface cracks, the underlying membrane is no longer fully UV-resistant. Coatings can extend life; replacement fixes it.
Roof past 20 years
If your EPDM is approaching or past 20 years, even without active leaks, the membrane is nearing end-of-life. A proactive replacement on your schedule is less expensive than an emergency replacement after a major storm.
Energy costs climbing
EPDM's black surface absorbs heat. If your building is air-conditioned and energy costs have been rising, a white reflective membrane like TPO may be worth comparing at the bid stage.
Four steps from inspection to warranty card.
Every EPDM install follows this same documented sequence regardless of building size.
Inspect and core-cut
Full roof walk with photographs of every deficiency. Core cuts at multiple field locations to test insulation moisture content. Written report with photos within 48 hours. No charge for the inspection.
Free / same weekScope and bid
Itemized bid covering membrane thickness, installation method, insulation replacement if needed, flashing details, and drain work. We compare EPDM to TPO at the bid stage if you want both numbers. No pressure toward either option.
48-hr turnaroundInstall
Crew arrives on schedule. Membrane installed to manufacturer specifications. Seams bonded with current-generation tape or adhesive, not legacy solvent systems. Drain collars rebuilt. Daily progress photos to your PM.
1 to 3 weeksWarranty and maintenance
Manufacturer warranty registered in your name. Bi-annual maintenance program available to keep the warranty valid and catch seam or flashing issues before they become leaks.
20-yr warrantyThickness, installation methods, and what drives the choice.
We install EPDM from Carlisle SynTec, Firestone, and Versico. All three offer 20-year warranties on properly installed systems. Membrane comes in three primary thicknesses: 45-mil, 60-mil, and 90-mil.
45-mil EPDM is the standard for simple flat commercial buildings with limited foot traffic. Warehouses that nobody walks on except for annual HVAC maintenance, storage buildings, and simple commercial structures with clean drainage are the right applications.
60-mil EPDM handles moderate foot traffic and provides better puncture resistance. Schools, retail buildings, and commercial properties where maintenance crews access the roof regularly benefit from the extra thickness.
90-mil EPDM is specified for high foot-traffic roofs, roofs with heavy equipment, and buildings in high-hail-exposure corridors. The additional thickness adds cost but meaningfully extends service life under difficult conditions.
What drives EPDM cost.
EPDM costs less to install than TPO on a comparable building, generally 10 to 20 percent less depending on building complexity. The lower membrane material cost is partially offset on large buildings where ballasted gravel installation adds weight load and structural considerations.
Installation method affects both cost and long-term performance. Fully adhered EPDM costs more than mechanically fastened or ballasted but performs better in high-wind areas. For commercial buildings in Tulsa and surrounding areas that see frequent spring thunderstorms and tornado-adjacent wind events, fully adhered is often worth the premium.
Insulation and substrate condition drive the biggest variable in any commercial flat roof bid. We core-cut before we bid specifically so the insulation number is accurate, not estimated. Buildings with wet insulation require full tear-off and replacement, which changes the project cost significantly.
Flat roof, big building, real budget.
Installed right the first time.
EPDM's reputation for seam failures comes almost entirely from improper installation, specifically from legacy adhesive methods and undertrained crews. Modern EPDM with current bonding materials and proper seam preparation does not fail the way older systems did. The difference is crew training and materials specification.
Our commercial foremen are certified on EPDM installation from Carlisle SynTec and Firestone. We do not mix legacy adhesive methods with current materials. Every seam detail is done to manufacturer specification and probed before the crew leaves the building.
Every EPDM install comes with a bi-annual maintenance program option that monitors seams, keeps drains clear, and keeps your warranty valid. For property managers overseeing multiple buildings, our roof asset management program tracks condition across your entire portfolio.
We install EPDM across Tulsa and these surrounding cities:
Questions before
the bid.
Not on the list? Call us. A human picks up. Usually on the second ring.
Ask us directly →The next storm
isn't waiting.
Whether your shingles are curling, your gutters are sagging, or you just want a second opinion before your insurer's deadline runs out, book the inspection. We don't charge for it, and we don't push for it.
(918) 978-2660Direct line · 7am – 9pm · 7 days