EPDM Roofing in Jacksonville, FL | Installation, Repair, Recover

Service

EPDM is the right specification for Jacksonville commercial buildings with chemical or solvent exposure, high-membrane-traffic industrial applications, and roofs where the long-term maintenance budget is the primary driver. We install 60-mil and 90-mil systems — fully adhered, mechanically attached, and ballasted — to Florida Building Code requirements.

EPDM (ethylene propylene diene monomer) is a synthetic rubber roofing membrane that has been the workhorse of commercial flat roofing since the 1970s. It is not as commonly specified for new installation in the Jacksonville market as TPO — TPO's white reflective surface meets Florida Energy Code's cool roof requirement without added cost, and TPO's heat-welded seam is faster to install than EPDM's tape or adhesive seam. But EPDM has specific applications where it outperforms TPO: chemical and solvent resistance, resistance to animal fat and grease without PVC's cost, compatibility with HVAC refrigerant oils, and durability in rooftop environments with high UV radiation and thermal cycling.

The Jacksonville industrial and logistics corridor — JAXPORT, Cecil Commerce Center, the NAS Jacksonville support facilities, and the manufacturing base along I-295 on the Westside — includes a significant number of buildings where chemical or solvent exposure rules out TPO. EPDM's chemical resistance makes it the correct specification for those buildings. The FSCJ (Florida State College at Jacksonville) multi-campus portfolio includes buildings with varying vintage and system types, some of which have original EPDM systems that are still performing and are correct candidates for recovery or coating rather than tear-off.

ASCE 7-22 wind-uplift requirements for Duval County — 130 mph design wind speed for Risk Category II, with higher speeds and exposure categories for coastal buildings at NS Mayport and the barrier island corridors — apply equally to EPDM as to TPO. Mechanically attached EPDM requires the same zone-by-zone fastener pattern analysis as TPO. Fully adhered EPDM typically provides superior wind-uplift performance but requires more precise surface preparation and adhesive application, which is a production-management matter we address through crew training and quality control inspection.

EPDM Installation Methods for Jacksonville Commercial Buildings

Fully adhered EPDM: The strongest wind-uplift performance available in an EPDM system. Membrane bonded to the substrate with a contact adhesive on both the membrane underside and the substrate surface, then mated and rolled. The adhesive system must be compatible with Jacksonville's high summer temperatures — adhesive applied in 95°F conditions cures faster than at 70°F and requires adjusted application timing to avoid premature setup. We schedule fully adhered EPDM application for morning windows during Jacksonville's June-September season. Fully adhered EPDM is the specified system for coastal buildings within one mile of the Atlantic Ocean or Intracoastal Waterway where wind exposure is highest.

Mechanically attached EPDM: Fastened with screws and plates through the membrane and insulation into the deck on a fastener pattern designed against the building's wind-uplift requirement. More common on large industrial buildings in the JAXPORT and Cecil Commerce Center corridors where fully adhered installation would require more crew-hours than the project schedule accommodates. Fastener patterns are calculated zone-by-zone per ASCE 7-22 — field zone, perimeter zone, corner zone — and documented in the submittal package.

Ballasted EPDM: Membrane loose-laid on the substrate and held in place with river-washed stone ballast at a minimum of 10 pounds per square foot. The least expensive EPDM installation method but only appropriate on buildings with adequate structural capacity to carry the ballast weight, where the deck permits loose-laid installation, and where wind exposure does not require the superior uplift resistance of adhered or mechanically attached systems. Ballasted EPDM is increasingly uncommon in new installation in the Jacksonville market given ASCE 7-22 wind requirements — but we encounter it on older buildings dating to the 1980s and 1990s in the Southside and Baymeadows corridors.

EPDM Seam Systems and Quality Control

EPDM does not heat-weld. Seams are formed with seam tape (factory-applied or field-applied splicing tape) plus seam primer, or with liquid adhesive. This is the most technically demanding aspect of EPDM installation — seam integrity depends on surface cleanliness, application temperature, and consistent pressure application across the seam width. Seams that are rushed, applied in too-cold or too-hot conditions, or applied to contaminated membrane surfaces fail.

We probe-test every linear foot of seam on every EPDM installation before closeout. Seam probe testing with a rounded probe instrument reveals separations that look bonded visually but are not under load. Any section of seam that deflects under probe testing gets re-prepped and re-applied. This is not optional on a Jacksonville building that will face convective storm season within weeks of installation.