Statewide product approval, then a stricter local layer
Florida's building code requires roofing products to carry a state product approval before installation. Miami-Dade and Broward counties, which make up Florida's High-Velocity Hurricane Zone, add a further requirement on top: a county-issued Notice of Acceptance for the specific product being installed.[1]
What changes when an existing roof is replaced
Miami-Dade's own roofing permit guidance lists retrofit requirements and, in some cases, a secondary water-barrier requirement that apply specifically when an existing roof is being replaced, on top of the standard product approval for the new material itself.[1]
The county also requires roof-to-wall connections to meet its own compliance standard, a detail that matters as much for how the roof is attached to the structure as which panel sits on top of it.[1]
Different forms for different roof types
Miami-Dade publishes separate, detailed permit forms for different roofing systems, including shingles, metal, tile, and membrane roofs. A metal installer working regularly in the county should be familiar with the specific form your project needs, not just the general permit process.[1]
Outside the HVHZ, still Florida rules
A property outside Miami-Dade and Broward still falls under Florida's statewide building code and product approval system, just without the added county-level Notice of Acceptance layer. Wind exposure still varies by county across the rest of Florida, so a product approval rated for your specific wind zone still matters.
A panel approved for a moderate inland wind zone isn't automatically approved for a higher-exposure coastal county nearby; the approval documentation is tied to a tested wind speed, not a blanket statewide rating.
What this means for panel and fastener choice
Standing seam systems with concealed, mechanically seamed clips generally test well for wind uplift because the panel-to-panel connection doesn't rely on a screw that can back out or fatigue under repeated gusts. That's part of why standing seam shows up often in HVHZ-rated product lines, though specific exposed-fastener systems carry their own approvals too.
The fastening pattern itself, how many screws or clips per square foot and how they're spaced, is part of what a product approval actually tests, which is why swapping in a different fastener spacing than the tested assembly can void the approval even with the same panel. That's a detail easy to miss on a quote that only names the panel product and not the tested attachment pattern behind it.