In High-Velocity Hurricane Zones, what specific uplift ratings and fastening schedules are being permitted for Solar Ro…

Trade Talk
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In High-Velocity Hurricane Zones, what specific uplift ratings and fastening schedules are being permitted for Solar Roof—are there county-level differences vs statewide Florida Product Approval?

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If you’re getting solar panels on your roof here in Florida, whether you’re in Miami or somewhere else, it’s gotta have the official Florida Product Approval with HVHZ certification—or a similar okay(NOA). When you put them in, you have to follow the instructions for the fastener spacing, underlayment, and flashing exactly how it says in the approval papers. Miami-Dade might ask for more paperwork or do a tougher inspection, but if it’s HVHZ-certified statewide, you’re usually good in the rest of Florida. Don’t skip corners or change how they’re installed, or you might get permit issues or fail inspection.

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In High-Velocity Hurricane Zones (HVHZ), Solar Roof systems must meet strict uplift ratings typically passing TAS 125 and TAS 100 tests and follow enhanced fastening schedules with more frequent deck attachments and edge securement.

While Florida Product Approval sets the baseline, counties like Miami-Dade and Broward often require separate, more stringent local approvals. Always check both state and county databases for current product approvals and local variations.

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In Florida’s High-Velocity Hurricane Zones (HVHZ), like Miami-Dade and Broward, solar roofs must meet strict uplift ratings often up to 116 psf and follow specific fastening schedules (e.g., six nails per shingle). You can use either a Florida Product Approval for HVHZ or a Miami-Dade NOA, both accepted locally. The standards are high due to extreme wind risk, but either approval ensures code compliance.

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Uplift Ratings:
Solar panels typically have uplift ratings ranging from 4,000 to 5,600 Pascals ¶, which translates to approximately 83.5 to 117 pounds per square foot (psf). Some panels have achieved higher ratings, significantly improving installation options in high-wind areas.
The 2020 Florida Building Code specifies design wind speeds for HVHZ, including:
Miami-Dade County: 175 mph
Broward County: 170 mph
Collier County: 170 mph, with some areas requiring 172 mph (e.g., Marco Island)

Fastening Schedules
Fastening schedules depend on the design wind speed, roof zone, and panel size. Engineers calculate wind loads using ASCE 7-16 standards to determine the required number and spacing of attachments.

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Definitely a good one :+1: