EPDM 60-mil roof systems for Tulsa industrial and legacy commercial buildings — ballasted, mechanically attached, and fully adhered. Specializing in end-of-life 1980s–90s EPDM replacement across the Tulsa industrial corridors.
EPDM has the longest proven track record of any commercial single-ply membrane. We install new 60-mil systems and replace the end-of-life 1980s–90s ballasted EPDM that covers a substantial share of Tulsa's industrial inventory — buildings in the Port of Catoosa industrial corridor, the South Elm Place parks, and the older warehouse stock along the Broken Arrow Expressway that are entering or past replacement age.
EPDM (ethylene propylene diene monomer) has been installed on Tulsa commercial roofs since the early 1980s. The distribution buildings and industrial facilities along the Broken Arrow Expressway, in the South Elm and Aspen Avenue industrial parks, and in the Port of Catoosa complex that were built in that era often carry original ballasted EPDM — and those systems are now 35 to 45 years old and at or past the end of their documented service life.
That aging install base is where most of our Tulsa EPDM work originates. An original ballasted EPDM system from 1986 that has been maintained may still be holding water — EPDM's rubber composition is exceptionally durable — but it carries no active warranty, no current documentation, and no remaining serviceable life from a capital planning or lender-review standpoint. Building owners who are refinancing, selling, or reporting to investors need a documented current roof condition, not a 40-year-old membrane with handwritten repair logs.
We also install new EPDM where the membrane's properties are the right fit: industrial buildings with elevated rooftop equipment traffic, facilities adjacent to chemical or petroleum operations where exposure compounds attack TPO over time, and buildings where the specific project conditions favor EPDM's elongation characteristics over single-ply TPO. We give owners an honest comparison for their building and let the application decide the specification.
The Port of Catoosa industrial complex, the South Elm Place and Aspen Avenue parks in Broken Arrow, and the industrial zones along the Broken Arrow Expressway from Highway 169 east were built out heavily between 1978 and 1998. Most received ballasted EPDM roofs — loose-laid 45-mil or 60-mil membrane weighted with 10 to 12 pounds per square foot of river-wash stone. Much of that stone remains on those roofs today.
When we inspect these systems, the consistent findings are: EPDM membrane that has passed its oxidation threshold and is brittle at field seams and flashings, ballast redistributed by decades of Oklahoma wind events and foot traffic leaving some areas thin, drains partially buried under shifted stone, and parapet flashings that have lost adhesion and are open at the termination bar. The honest assessment is usually full replacement — the membrane cannot be reliably patched at this age, and a recover over degraded or wet ballasted EPDM produces a new warranty that most manufacturers will not write.
Ballasted EPDM is what we are largely removing from Tulsa industrial buildings, not installing new. The system is straightforward — loose-laid membrane held down by stone — but the structural load of 10 to 12 psf rules out most modern construction, the stone complicates post-storm hail assessment, and eventual replacement is more expensive because the ballast must be removed and disposed of before the new system goes down.
Mechanically attached EPDM uses plates, fasteners, and battens secured to the deck in a pattern designed against the building's wind-uplift requirement. We use this method on most new Tulsa EPDM installations — it installs efficiently, produces a consistent attachment pattern, and is compatible with the wind-uplift design documentation that manufacturer warranties require. Fully adhered EPDM bonds the membrane directly to the cover board or insulation substrate and is our preference on reroofs where penetration density or parapet conditions require the cleanest possible flashing detail.
EPDM's rubber composition gives it inherent flexibility under hail impact compared to rigid membrane alternatives. That flexibility does not mean immunity — documented 2-inch-plus hail events across Tulsa County and the Wagoner County corridor have produced membrane breach on EPDM systems without rated cover boards. Our standard EPDM specification includes an HD polyiso cover board that provides meaningful impact resistance and supports FM 4470 Class 1 or UL 2218 Class 4 hail-resistance ratings for insurance documentation purposes.
Wind uplift is the second environmental design variable for Tulsa EPDM. The open-terrain exposure category that applies to most Port of Catoosa and South Elm industrial buildings produces higher uplift demands than an equivalent downtown structure in Exposure B terrain. We run the uplift design for every project and verify the fastener pattern against the manufacturer's published requirements — that design documentation is part of the closeout package and is what the warranty inspector reviews at the final walk.
Not necessarily in an emergency sense — a well-maintained 1988 ballasted EPDM system can still hold water if the membrane has not reached brittleness at seams and flashings. But a 37-year-old system with no active warranty, no documentation, and no remaining serviceable life from an asset-management perspective is a liability for capital planning and lender review. We do a full inspection with moisture cores, drain assessment, and parapet walk, then produce a written condition report with a recommended replacement timeline and budget range. Most owners in that situation find the data useful before refinancing or ownership transition.
Yes, with the same conditions that apply to any recover: the existing insulation must be dry on core pulls, the deck must be sound, and the existing system must be compatible with the new assembly. Ballasted EPDM recovers require complete ballast removal before the new system goes down — that is a separate cost and schedule item that must be in the project scope. We include ballast-removal sequencing and disposal in every ballasted-recover scope we write.
We install both and recommend based on the building. EPDM's advantages in Tulsa industrial applications: better elongation under Oklahoma's wide seasonal temperature swings, better resistance to petroleum-based chemical exposure common in industrial zones near the Port of Catoosa, and a long proven performance record on the install base we inspect regularly. TPO's advantages: white membrane delivers energy code compliance and summer HVAC load reduction without additional coating, and heat-welded seams are faster and more consistent than tape seaming. We give owners the comparison in writing for their specific building.
We inspect, pull cores, document the condition, and produce a written replacement scope — with wind-uplift design, hail-resistance specification, and a sequencing plan that keeps your building dry during the project.
Tell us about the building and the roof problem. We'll document it and put a plan in writing — no pressure, no boilerplate.
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