Commercial roofing in Mulberry, FL

Commercial flat and low-slope roofs depend on slope to drain. Florida requires a minimum design slope of one-fourth unit in 12, or 2 percent, for built-up, modified bitumen, single-ply and liquid-applied roofs. A roof that holds water above that line should be looked at before any new membrane goes on.

Rain here is heavy. Tropical Storm Debby in 2024 produced a Polk rainfall maximum of 8.03 inches near Mulberry, and an EF0 tornado touched down in South Mulberry in an outer rainband. That rainfall is more than eight times the one-inch figure many owners plan around, which is why overflow and drain capacity deserve a line in every bid.

The High-Velocity Hurricane Zone covers only Broward and Miami-Dade counties, so Mulberry work follows the general Florida Building Code and not the stricter HVHZ permit path. Work still needs a permit from the local building office, and the 25 percent rule applies to any reroofing. Ask the contractor which permit office will issue the job and who signs the application.

Florida requires a roofing contractor to be certified or registered for roofing work, and general contractors need that status too before they advertise as roofers. Ask for the state license number and look it up before you sign. A Notice of Commencement must be recorded and posted before the first inspection on a large job, so the bid should say who files it.

• Ask whether the bid includes the 25 percent rule calculation for your roof area.
• Ask how the bid handles overflow drains and ponding water.
• Ask which permit office will issue the job and when the permit expires if work stalls.
• Compare the membrane type and its ASTM standard, not only the price.