Direct Answer
A High-Velocity Hurricane Zone (HVHZ) is a specially regulated hurricane-wind region in Florida consisting of Miami-Dade County and Broward County. Buildings and roofing systems in the HVHZ are subject to enhanced wind-resistance, hurricane protection, product approval, and construction requirements because of the area’s extreme hurricane wind exposure.
Who This Applies To
HVHZ requirements are particularly important for property owners, facility managers, architects, engineers, general contractors, roofing contractors, developers, and building officials working on buildings in Miami-Dade or Broward County.
Not for: Properties outside Miami-Dade and Broward are generally considered outside the HVHZ, although they may still be located in Florida’s wind-borne debris regions and may have significant hurricane-related requirements.
1. Which Florida Counties Are in the HVHZ?
| County | HVHZ Status |
|---|---|
| Miami-Dade County | HVHZ |
| Broward County | HVHZ |
| Other Florida counties | Outside HVHZ, but other wind and hurricane requirements may apply |
The Florida Building Code specifically identifies Miami-Dade and Broward Counties as the High-Velocity Hurricane Zone.
2. Why Does the HVHZ Matter for Commercial Roofing?
For commercial roofing, the HVHZ designation matters because roofing assemblies and components must be designed and approved for the applicable wind pressures and installation requirements.
Depending on the roofing assembly, this can affect:
- Roof membrane attachment
- Fastener and plate requirements
- Edge-metal systems
- Roof-to-wall attachment
- Flashing details
- Roof coverings
- Roof-mounted equipment
- Impact-resistant components where required
- Wind-uplift resistance
- Product approvals and installation limitations
3. HVHZ vs. Non-HVHZ Florida
| Factor | HVHZ | Non-HVHZ Florida |
|---|---|---|
| Geographic area | Miami-Dade and Broward Counties | Other Florida counties |
| Hurricane exposure | Extremely high | Varies by location |
| Wind-resistance requirements | Enhanced requirements apply | Requirements depend on location and building characteristics |
| Product approval | HVHZ-specific approval may be required | Florida Product Approval or other applicable approval may apply |
| Roofing design | Must comply with applicable HVHZ provisions | Must comply with applicable Florida Building Code requirements |
4. Does HVHZ Mean Every Roof Needs the Same Wind Rating?
No. The required wind resistance is not identical for every building. Design requirements depend on factors such as the building’s risk category, height, exposure, location, geometry, and applicable code provisions.
The Florida Building Commission identifies different design wind speeds for Miami-Dade and Broward Counties based on risk category.
5. What Is the Difference Between HVHZ and a Wind-Borne Debris Region?
They are related but are not the same designation.
A wind-borne debris region is defined based on applicable wind-speed and coastal-location criteria. The HVHZ, by contrast, is a specific geographic designation covering Miami-Dade and Broward Counties. Florida Building Commission materials identify additional hurricane-protection requirements for both wind-borne debris regions and the HVHZ.
6. Does HVHZ Affect Roofing Product Approval?
Yes. A roofing or building product may have specific limitations regarding whether it is approved for use inside or outside the HVHZ. Florida’s product-approval database, for example, identifies whether individual products are approved for use in the HVHZ.
Therefore, a contractor should not assume that a product approved elsewhere in Florida can automatically be used on an HVHZ project. The product’s approval documentation, design pressures, installation instructions, and project-specific requirements should be reviewed.
7. What Should a Commercial Property Owner Check?
- Confirm whether the property is in Miami-Dade or Broward County.
- Identify the applicable Florida Building Code requirements.
- Determine the required design wind pressures.
- Verify the roofing assembly’s applicable product approval.
- Review the manufacturer’s installation requirements.
- Confirm fastener, attachment, edge, and flashing details.
- Keep product approvals, engineering documents, permits, inspection records, and installation documentation.
Bottom Line
A High-Velocity Hurricane Zone (HVHZ) is Florida’s specially regulated hurricane-wind zone covering Miami-Dade and Broward Counties. Commercial buildings in these counties can be subject to more stringent hurricane, wind-resistance, product-approval, and construction requirements. For roofing projects, verifying the applicable wind pressures and whether the roofing products and assemblies are approved for HVHZ use is an important part of project planning.
Related Questions
- What is the primary difference between Miami-Dade NOA and Florida Product Approval?
- Can I use an NOA-approved product in a non-HVHZ county?
- Do all commercial roofing projects in Florida require product approval?
- How can I verify if a roofing product has an NOA or FPA?
- Does my insurance company care about my roof’s wind uplift rating?
Sources
- Florida Building Commission – High-Velocity Hurricane Zone and wind-speed information
- Florida Building Commission – Hurricane Protection and HVHZ overview
- Florida Building Code Product Approval database
- Florida Building Commission – Florida Building Code resources
Last reviewed: October 2026
Related Resources
For commercial roofing projects in Florida, review the applicable building-code requirements, product approvals, design pressures, and manufacturer installation documentation before selecting or installing a roofing system.
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Disclaimer: This information is for general educational purposes and does not replace project-specific advice from a Florida-licensed design professional, building official, or qualified roofing professional.
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