Commercial Roof Replacement in Jacksonville, FL

Service

Full-system tear-off and replacement on Jacksonville commercial flat roofs — scoped against Florida Building Code wind-uplift requirements, closed out with manufacturer warranty documentation and a capital record the next owner can use.

Most commercial roof replacements in the Jacksonville metro get scoped reactively. The roof leaks after a tropical system, someone calls three contractors, and the lowest bid wins. That replacement often runs the same membrane over the same failing substrate — and then fails again in two years. We work differently.

Our replacement scope starts with a documented roof walk and moisture-core pulls on any roof where we suspect saturated insulation. We record deck condition, parapet flashing condition, drain and scupper status, every penetration, every prior repair, and every location where we see salt-air corrosion on metal components within five miles of the Intracoastal Waterway or Atlantic coast. In Jacksonville's coastal exposure zone, that last item is not optional — salt air degrades fastener pullout values, copper drain assemblies, and HVAC curb flashings faster than inland markets.

The replacement scope specifies the membrane type, the insulation stack to current Florida Energy Code R-values, the fastener density to Florida Building Code wind-uplift requirements for the building's location and exposure category, the manufacturer warranty path, and the maintenance program that keeps the warranty active. The closeout package is the warranty document, the roof zone diagram with all closeout photos keyed to it, the maintenance contract, and a written record the next reroof cycle can build against.

Recover Versus Replace: The Decision Framework

Recovery — installing a new membrane over an existing roof — is a legitimate scope option when the existing insulation is dry and the deck is sound. It avoids landfill disposal costs, reduces labor, and typically costs 40-60% of full replacement. We pull moisture cores in five to ten representative locations on any roof where recovery is under consideration. If more than 25% of cores read saturated, recovery traps the moisture and voids the new manufacturer warranty. Full replacement becomes the honest scope.

Deck condition is the second variable. Corroded steel deck or rotted wood deck means deck replacement, which is a different cost band and a different project sequencing plan. We pull deck inspection ports under wet core locations and at any obvious deflection before quoting, so the building owner knows what they are committing to before crews show up.

Florida Building Code adds a third factor: the 25% rule. Under FBC Section 1511, if more than 25% of a roof area is replaced or recovered within any 12-month period, the entire roof must be brought to current code. We document the project scope against that threshold and advise owners who are phasing work over multiple years how to plan phases to stay below or at the threshold.

What the Jacksonville Replacement Scope Specifies

Membrane: TPO 60-mil is the standard commercial specification for Jacksonville warehouse, office, and retail buildings. TPO 80-mil for buildings with heavy rooftop mechanical traffic or owners who want the 25-year manufacturer warranty option. EPDM 60-mil for industrial buildings with high-chemical or solvent exposure — TPO degrades in certain chemical-heavy environments. PVC 50-mil or 60-mil for commercial kitchens and food-processing facilities where grease resistance matters.

Insulation: We specify to Florida Energy Code minimums — IECC 2021 as adopted in FBC 8th Edition, minimum R-20 for low-slope commercial, often R-25 or higher depending on building use and occupancy. Polyiso primary insulation plus a cover board (HD polyiso, glass-faced gypsum, or HD fiber) is the standard stack. Tapered packages are designed against the actual ponding patterns we documented during inspection — not against a generic 2% slope assumption.