HVHZ Roofing Requirements in Broward & Miami-Dade

Every roof in Miami-Dade and Broward counties sits within the High-Velocity Hurricane Zone (HVHZ). This special section of the Florida Building Code enforces the strictest wind-resistance and building rules in the United States. Because this area historically faces the strongest hurricane landfalls, a roof that meets code in other parts of Florida is not automatically legal here.

Key HVHZ Requirements

Design Wind Speeds

Roofs in the HVHZ must be engineered to withstand design wind speeds of 170+ mph.

Approved Products

Every component — underlayment, shingles, tiles, metal panels, and fasteners — must carry a Miami-Dade Notice of Acceptance (NOA) or equivalent Florida Product Approval rated for HVHZ use. The NOA proves the product has passed rigorous wind-uplift and impact testing.

Enhanced Installation Methods

Specific attachment techniques are mandated: ring-shank nailing patterns, sealed roof decks, secondary water barriers, and enhanced edge-metal and flashing details. Architectural shingles require a 6-nail pattern and specialized adhesives.

Full Tear-Off Required

When replacing a roof in the HVHZ, going over the old roof is not permitted. A full tear-off is required so every layer meets current code.

By ensuring your roof complies with these HVHZ standards, you're investing in maximum resilience against hurricane-force winds and water intrusion. Safetech Roofing & Windows is fully licensed and permit-experienced in both Broward and Miami-Dade.