HVHZ and NOA Explained: Miami Building Code for Impact Windows
Updated Nov 2026 · 12 min read
Windows and Doors Repair LLC does not perform HVHZ-certified installations. This article explains HVHZ code for homeowner education. For HVHZ-certified work, we refer to licensed Florida contractors. For non-impact glass replacement, see our glass replacement service or emergency board-up. glass replacement service or emergency board-up.
MIAMI-DADE COUNTY
PRODUCT CONTROL APPROVAL
HVHZ STANDARD
High-Velocity Hurricane Zone
NOA Required: TAS 201, 202, 203
Miami-Dade Code §1626 · ASCE 7-22 · ASTM E1996
Miami-Dade County sits inside the only High-Velocity Hurricane Zone (HVHZ) in the continental United States. That designation means every building product installed on a residential opening — windows, doors, skylights — must survive tests no other US jurisdiction requires. Homeowners shopping for impact windows will repeatedly encounter two acronyms: HVHZ and NOA. Understanding what they mean protects you from buying non-compliant products and from hiring contractors who cut corners.
A Notice of Acceptance (NOA) is a certificate issued by the Miami-Dade Product Control Section confirming that a specific window product has passed the Large Missile Impact Test, Uniform Static Air Pressure Test, and Cyclic Wind Pressure Loading Test. Without an NOA, a product cannot be installed on a Miami-Dade residential property and pass final inspection. No NOA means no permit approval, no insurance discount, and no legal compliance.
Enforcement falls to the Miami-Dade Product Control Section, which maintains the official NOA database, conducts random field inspections, and can issue stop-work orders on projects using unapproved products. In 2025, the section de-listed 14 window product lines after post-installation testing revealed non-compliant glass thickness.
Key Terms
HVHZ
High-Velocity Hurricane Zone (Miami-Dade, Broward). The only US region requiring large-missile impact testing for residential openings.
NOA
Notice of Acceptance. Miami-Dade product approval certificate issued after TAS testing and engineering review.
TAS 201
Large Missile Impact Test. A 9-pound 2x4 fired at 50 ft/sec against the product surface.
TAS 202
Uniform Static Air Pressure Test. Verifies the product resists sustained wind pressure without deflection failure.
TAS 203
Cyclic Wind Pressure Loading Test. Simulates repeated positive and negative wind cycles over 3,000+ repetitions.
PCA
Product Control Approval. The formal approval process managed by Miami-Dade County Product Control Section.
WBDR
Wind-Borne Debris Region. Statewide coastal zone within one mile of the shore requiring protected openings.
WLZ
Wind Loaded Zone classification. Assigned per ASCE 7-22 based on site location, height, and exposure.
Florida Wind Code Zones
HVHZ
175 mph · Miami-Dade, Broward
WBDR
140 mph · Coastal 1mi inland statewide
Standard
130 mph · Interior Florida
Why HVHZ Is Stricter
Miami-Dade Code §1626 requires a 9-pound 2x4 lumber projectile test at 50 feet per second against every approved window product. No other jurisdiction in the United States mandates this specific combination of projectile weight and velocity. The standard was codified after Hurricane Andrew (1992) revealed that conventional windows and doors failed catastrophically under wind-borne debris, pressurizing structures and causing total structural collapse. HVHZ products must not only stop the projectile but also maintain structural integrity afterward — no visible cracking through the inner glass pane.
How a Window Gets NOA-Approved
Manufacturer submits product specs
Complete engineering drawings, material specifications, and assembly details are submitted to the Miami-Dade Product Control Section (PCA) for preliminary review.
Independent lab runs TAS testing
A certified third-party laboratory performs TAS 201 (large missile impact), TAS 202 (uniform static air pressure), and TAS 203 (cyclic wind loading) on production samples.
Engineering review by PCA
Miami-Dade engineers analyze test data, verify compliance with ASCE 7-22 design pressures, and confirm that the product meets HVHZ requirements for its intended WLZ classification.
NOA certificate issued
Upon approval, the Product Control Section issues a formal NOA certificate with a 5-year validity period. The NOA number must appear on every product label.
Annual re-listing required
Manufacturers must submit annual re-listing documentation confirming that production methods and material sources have not changed from the originally tested configuration.
HVHZ vs WBDR vs Standard
| Standard | Design Wind Speed | Missile Test | Coverage Area |
|---|---|---|---|
| HVHZ | 175 mph | Large + Small (TAS 201) | Miami-Dade, Broward |
| WBDR | 140 mph | Small only | Coastal 1mi inland statewide |
| Standard | 130 mph | Not required | Interior Florida |
| International | Varies | Not required | Outside Florida |
What This Means for Homeowners
Buying
Every product MUST show a valid NOA number on the frame label or packaging. Ask your contractor for the NOA certificate before any deposit. Cross-check the number on the Miami-Dade PCA database.
Hiring
Verify the contractor's Florida state license (check myfloridalicense.com) and confirm their Miami-Dade permit number is active. Unlicensed contractors cannot pull permits, and their work voids your warranty.
Insurance
Without NOA-stamped windows, no wind mitigation discount applies. Insurers require photographic proof of NOA labels during re-inspection. Non-compliant installations can void coverage entirely.
Verify Your Installer
Before signing any contract, verify three things: the product has an active NOA, the contractor holds a current Florida state license, and the project has a valid Miami-Dade building permit. These checks take under five minutes and protect you from non-compliant installations that fail inspection and void insurance coverage.
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