Commercial roofing in South Miami Heights, FL

Of the two Florida counties that make up the High-Velocity Hurricane Zone, Miami-Dade is one. That zone carries the strongest hurricane provisions in the state, and it applies to roof work here. A permit is required for repair or maintenance of any roofing component.

The county building office issues roof permits for this unincorporated area. Under the 25 percent rule, no more than 25 percent of a roof area may be repaired or replaced in 12 months unless the whole roof system is redone. Ask the contractor how the job fits that limit before work starts.

• Confirm the HVHZ roofing permit application is completed for your building.
• Ask for the product approval and Notice of Acceptance numbers for every membrane or edge system.
• Check that the low-slope design meets the 1/4 unit in 12 minimum slope.

Ask each bidder for the drainage plan. A roof with positive drainage clears standing rain within 48 hours after it falls. Ask how overflow drains are handled where a parapet traps water.

Ask whether the bid includes wind uplift testing for edges. Edge systems on low-slope roofs must meet tested wind design requirements under the code. Compare bids on the same scope and the same product approvals, not on the lowest total.