Direct Answer
The High-Velocity Hurricane Zone (HVHZ) is a special geographic area under the Florida Building Code with enhanced requirements for construction designed to withstand extreme hurricane wind conditions. The HVHZ consists specifically of Miami-Dade County and Broward County. It does not include Palm Beach County or the other Florida counties. :chatgpt-content-reference{index=”0″}
For commercial roofing, being located in the HVHZ is important because roof systems, edge conditions, coverings, openings, attachments, and other building components may be subject to requirements that are specific to these high-wind areas. The Florida Building Commission identifies Miami-Dade and Broward as the state’s HVHZ and maintains separate code provisions and product-approval requirements applicable to the zone. :chatgpt-content-reference{index=”1″}
Who This Applies To
- Commercial property owners in Miami-Dade or Broward County
- Developers and general contractors
- Commercial roofing contractors
- Architects and engineers
- Property and facility managers
- Building owners planning roof replacement or new construction
- Owners evaluating roofing products for hurricane-prone properties
Not for: HVHZ should not be confused with Florida’s broader wind-borne debris region. Other parts of Florida can have significant wind and hurricane requirements without being located inside the HVHZ.
1. Which Florida Counties Are in the HVHZ?
| County | HVHZ? | Commercial Roofing Significance |
|---|---|---|
| Miami-Dade County | Yes | HVHZ requirements apply |
| Broward County | Yes | HVHZ requirements apply |
| Palm Beach County | No | Not classified as HVHZ |
| Monroe County | No | Not classified as HVHZ |
| All other Florida counties | No | Outside the HVHZ |
The Florida Building Commission’s materials specifically define the HVHZ as Miami-Dade and Broward Counties. :chatgpt-content-reference{index=”2″}
2. Why Was the HVHZ Created?
South Florida experiences some of the most severe hurricane wind conditions in the United States. The Florida Building Code therefore contains specific requirements addressing construction in the HVHZ.
The Florida Building Commission explains that the code contains provisions addressing regional and local variations and that the HVHZ provisions apply specifically to Miami-Dade and Broward Counties. :chatgpt-content-reference{index=”3″}
For a commercial roof, this means the design and installation cannot simply be treated as an ordinary Florida roofing project. Wind resistance, attachment, edge conditions, openings, and approved products can become particularly important.
3. How Does HVHZ Affect Commercial Roofing?
HVHZ requirements can affect several aspects of a commercial roofing project, including:
- Roof-system wind resistance
- Roof covering requirements
- Roof edge and perimeter conditions
- Attachment methods
- Flashing and penetration details
- Roof-mounted components
- Impact protection requirements where applicable
- Product approvals
- Design pressures
- Installation requirements
- Testing and compliance documentation
The exact requirements depend on the building, roof system, product, design pressures, applicable code provisions, and project circumstances.
4. What Is Different About Roofing Products in the HVHZ?
One important difference is the Florida product-approval system. Products used in Florida may have specific limitations identifying whether they are approved for use inside the HVHZ.
Florida’s official Product Approval database, for example, identifies whether individual products are approved for use in the HVHZ and whether they have impact-resistant characteristics and specified design-pressure ratings. :chatgpt-content-reference{index=”4″}
Therefore, a roofing product that is acceptable elsewhere in Florida should not automatically be assumed to be acceptable for an HVHZ project.
5. What About Roof Wind Loads?
Wind design is one of the major reasons HVHZ projects receive additional attention.
Florida Building Commission materials identify specific wind-speed criteria for Miami-Dade and Broward Counties by building risk category. For example, the Commission’s published HVHZ material lists different design wind speeds for Miami-Dade and Broward depending on Risk Category. :chatgpt-content-reference{index=”5″}
The actual wind design for a particular commercial roof should be determined using the applicable Florida Building Code provisions and referenced standards rather than relying on a general county-level wind-speed number.
6. Does Every Florida Coastal Property Fall Under HVHZ?
No.
This is an important distinction. Being located on Florida’s coast or in a hurricane-prone area does not automatically place a property in the HVHZ.
The HVHZ definition specifically identifies Miami-Dade and Broward Counties. Other Florida locations may still have substantial wind, hurricane, and wind-borne-debris requirements, but those requirements are not the same as being classified as HVHZ. :chatgpt-content-reference{index=”6″}
7. Is Palm Beach County Part of the HVHZ?
No. Palm Beach County is not part of the HVHZ.
This distinction can matter when selecting products, preparing roofing specifications, reviewing product approvals, and determining which Florida Building Code provisions apply.
A project in Palm Beach County can still have significant wind-resistance requirements. However, it should not be described as an HVHZ project solely because it is located in South Florida.
8. How Does HVHZ Affect Roof Replacement?
If an existing commercial roof in Miami-Dade or Broward County is being replaced, the project team should determine the applicable current code requirements before selecting the roof system.
The review may include:
- Applicable Florida Building Code edition
- Local amendments
- Building risk category
- Required design pressures
- Roof assembly approval
- Product approvals
- Attachment requirements
- Edge-metal requirements
- Penetration and flashing details
- Wind-borne-debris requirements where applicable
- Required permits and inspections
The Florida Building Commission’s current code-development materials identify the 9th Edition (2026) Florida Building Code update and include dedicated roofing code-development materials. The applicable code edition should be confirmed based on the project’s permitting and jurisdictional circumstances. :chatgpt-content-reference{index=”7″}
9. How Does HVHZ Affect New Commercial Construction?
For a new commercial building in Miami-Dade or Broward County, HVHZ considerations should be addressed during design rather than after the roofing system has already been selected.
The design team should coordinate:
- Structural design
- Roof system selection
- Roof deck
- Insulation and membrane assembly
- Perimeter conditions
- Edge metal
- Roof penetrations
- Mechanical equipment
- Skylights and roof openings
- Roof-mounted equipment
- Product approvals
Early coordination helps prevent a roofing system from being specified that cannot satisfy the applicable wind or product-approval requirements.
10. Does HVHZ Mean Every Roof Needs Impact-Resistant Materials?
Not necessarily.
HVHZ requirements should not be reduced to a simple rule that every component must be labeled “impact resistant.” The applicable requirements depend on the building, component, location, code provisions, and product.
Florida’s Product Approval system separately identifies whether products are impact resistant and whether they are approved for HVHZ use, demonstrating that these are related but distinct characteristics. :chatgpt-content-reference{index=”8″}
11. How Should Owners Verify an HVHZ Roofing Product?
Before approving a roofing product for an HVHZ project, the project team should verify the product’s Florida approval information and confirm that the approval applies to the intended application.
Review:
- Florida Product Approval number
- Approved assembly or product description
- HVHZ approval status
- Design-pressure limitations
- Installation instructions
- Referenced testing standards
- Applicable roof assembly
- Project-specific engineering requirements
Florida’s official Product Approval database provides an “Approved for use in HVHZ” field for products, making it possible to verify this information rather than relying solely on a manufacturer’s general marketing description. :chatgpt-content-reference{index=”9″}
12. What Should Commercial Property Owners Do?
If you own a commercial building in Miami-Dade or Broward County, maintain documentation showing how the roof system complies with the requirements applicable to the property and project.
Keep:
- Roof plans and specifications
- Product approvals
- Installation documentation
- Engineering calculations where applicable
- Permit records
- Inspection records
- Manufacturer documentation
- Roof warranties
- Repair and maintenance records
- Roof replacement records
This documentation can be valuable when repairing, replacing, inspecting, refinancing, selling, or insuring the property.
13. HVHZ vs. Wind-Borne Debris Region
| HVHZ | Wind-Borne Debris Region |
|---|---|
| Specifically Miami-Dade and Broward Counties | Applies to broader areas of Florida based on applicable wind-speed and proximity-to-coast criteria |
| Contains special HVHZ code provisions | Addresses protection from wind-borne debris under applicable code provisions |
| Specific South Florida regional classification | Can apply outside Miami-Dade and Broward |
| Includes specialized product/code considerations | May impose opening-protection requirements depending on location and building |
The Florida Building Commission distinguishes the HVHZ of Miami-Dade and Broward from the broader wind-borne-debris region. :chatgpt-content-reference{index=”10″}
Bottom Line
The High-Velocity Hurricane Zone (HVHZ) is the Florida Building Code’s special high-wind zone covering Miami-Dade County and Broward County only. Commercial buildings in these counties can be subject to specific requirements involving wind resistance, roofing assemblies, product approvals, design pressures, roof edges, openings, and related construction details. :chatgpt-content-reference{index=”11″}
For a commercial roofing project, do not determine compliance simply by asking whether a product is “Florida approved.” Confirm whether the product and proposed assembly are approved for the HVHZ and whether they satisfy the design and installation requirements applicable to the specific project.
Related Questions
- Which Florida high-wind roofing details does an RRO watch most closely?
- How does roofing sequencing affect the overall commercial construction schedule?
- What roofing inspections do Florida building departments require on new commercial construction?
Sources
- Florida Building Commission — HVHZ definition and Miami-Dade/Broward provisions
- Florida Building Commission — Setting New Standards for Safety
- Florida Building Commission — 9th Edition (2026) Code Development
- Florida Building Commission — Product Approval System
- Florida Statutes §553.73 — Florida Building Code
Last reviewed: October 2026
Related Resources
Which Florida High-Wind Roofing Details Does an RRO Watch Most Closely?
Need Commercial Roofing Help?
ShieldLine Roofing can help commercial property owners evaluate roof conditions, plan roofing work, and coordinate commercial roofing projects with the applicable Florida requirements.
Disclaimer: This information is provided for general educational purposes and is not building-code, engineering, legal, insurance, or permitting advice. Code requirements can vary by project, building, jurisdiction, permit date, and applicable code edition. Confirm project-specific requirements with the authority having jurisdiction and qualified design and roofing professionals.
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