Florida HVHZ Impact Window NOA Compliance

Why this matters

If you are selling, ordering, or installing windows in Miami-Dade or Broward County Florida, every fenestration product must carry a current Notice of Acceptance (NOA) from Miami-Dade County Building Code Compliance Office. Outside the High Velocity Hurricane Zone (HVHZ - Miami-Dade and Broward only), products must carry a current Florida Product Approval listing under Rule 61G20-3 of the Florida Building Code. Selling the wrong product, or selling a product whose NOA has expired between the contract and the install, is the most common path to a permit rejection in South Florida. This article gives the regulatory framework, the catalog reality of which OEMs carry which approvals, and the field steps to confirm compliance before you sign a contract.

What HVHZ means in code and geography

The Florida Building Code (FBC) defines the High Velocity Hurricane Zone as Miami-Dade County and Broward County. Within HVHZ, the FBC requires products to carry a Miami-Dade County NOA in addition to (not instead of) Florida Product Approval. Outside HVHZ, the FBC requires Florida Product Approval per Rule 61G20-3 but does not require a Miami-Dade NOA. Coastal counties outside HVHZ (Palm Beach, Martin, St. Lucie, Indian River, Brevard, Volusia, Flagler, St. Johns, Duval, Nassau on the east coast; and the Gulf coast counties) follow the Wind-Borne Debris Region (WBDR) provisions of the FBC. The WBDR boundary is defined by the basic wind speed map in ASCE 7 and the FBC. In WBDR, products must either be impact-rated or be protected by code-compliant shutters; the choice is the owner's, but the install must document the path.

What an NOA actually certifies

A Miami-Dade NOA is a product-specific approval document. It identifies the manufacturer, the product line, the maximum tested unit size, the design pressures the product is approved for (positive and negative, in psf), the impact rating (Large Missile per ASTM E1996 / ASTM E1886, or Small Missile, or Non-Impact), and the install conditions for which approval is granted (substrate, anchor type, anchor spacing, sealant type). The NOA carries an effective date and an expiration date - typically 5 years from issue. An NOA that expires between contract signing and permit application is a permit rejection waiting to happen. NOAs are public record; verify the current document at the Miami-Dade Regulatory and Economic Resources Department's online NOA search before order entry.

Wind speed and design pressure - the upstream calculation

The required design pressure for a given opening depends on the basic wind speed at the project location (per ASCE 7 and the FBC wind speed map), the exposure category (B suburban, C open, D coastal), the building height, and the opening's location on the elevation (corner zones see higher pressures than field zones). The engineer of record or the contractor's wind-pressure calculation sets the target DP the product must meet or exceed. A typical 2-story coastal home in Exposure C might generate corner-zone design pressures in the 60 to 80 psf range and field-zone pressures in the 45 to 60 psf range. Quoting a +/- 50 psf product into a 70 psf corner zone is a permit rejection. The product NOA must equal or exceed the design pressure for both positive (wind blowing against the wall) and negative (wind sucking outward from the wall).

Which OEMs carry HVHZ NOAs

Andersen carries HVHZ NOAs on the A-Series Coastal and 400 Series Stormwatch impact-rated configurations; verify the specific NOA number for the SKU and size. PGT (PGT Innovations, now part of MITER Brands) is the dominant HVHZ vinyl and aluminum brand and carries deep NOA coverage across WinGuard vinyl, WinGuard aluminum, and EnergyVue. CGI (also MITER Brands) carries NOAs on its Estate, Sentinel, and Targa series in aluminum and vinyl. Eze-Breeze, Marvin (Coastline), Pella (HurricaneShield), Simonton (StormBreaker Plus), and several others carry NOAs on specific impact-rated configurations. Non-impact NOAs exist for shuttered-opening compliance but you still need shutters that carry their own NOA. Verify every product NOA at the Miami-Dade portal at the time of order entry; do not rely on a dealer's verbal "yes, that's approved" - the dealer is not the AHJ.

Field steps before contract signature

(1) Determine HVHZ vs WBDR vs non-coastal by project address. Miami-Dade and Broward are HVHZ. East-coast and Gulf-coast counties outside HVHZ are WBDR. Inland counties are non-coastal. (2) Get the basic wind speed and exposure category for the project address from the AHJ or an ASCE 7 lookup tool. (3) If WBDR, decide impact glass vs shutters with the homeowner; impact glass is structurally cleaner and avoids the hurricane-day shuttering labor, but is more expensive at the SKU level. (4) Get the design pressure per opening from a wind-load calculation - either your in-house engineer or the OEM's engineering services. (5) Pick the OEM SKU whose NOA covers the required DP at the opening size in question. Verify the NOA is current at the Miami-Dade portal. Document the NOA number, expiration date, and design pressure on the contract.

Permit submittal package

The permit application requires: the NOA cover page and detail sheets for each product SKU; the wind-load calculation showing required DP per opening; an elevation drawing showing window locations and sizes; an installation drawing showing anchor type, spacing, and substrate; and the contractor's license and bond information. Missing any of these is the most common rejection cause. The Miami-Dade Building Code Compliance Office and the Broward County Building Code Services Division publish current submittal checklists; pull the current version for the year of submission.

Post-install inspection traps

The HVHZ inspection includes anchor schedule verification (the inspector will count anchors per side and measure spacing against the NOA), sealant type verification (some NOAs name a specific sealant SKU, and a substitute is a fail), opening protection verification if non-impact glass with shutters is the compliance path, and as-installed DP labeling. Many inspectors require the manufacturer's product label to remain in place on the unit until inspection sign-off. Do not let the install crew peel labels at install; require photo evidence of labels in place at rough inspection.

References

• Florida Building Code (FBC), current edition, Building, Sections on HVHZ and WBDR
• Miami-Dade County Building Code Compliance Office (BCCO), NOA search at miamidade.gov/economy/building
• Florida Department of Business and Professional Regulation, Rule 61G20-3, Florida Product Approval
• ASTM E1886 Standard Test Method for Performance of Exterior Windows, Curtain Walls, Doors, and Impact Protective Systems Impacted by Missiles and Exposed to Cyclic Pressure Differentials
• ASTM E1996 Standard Specification for Performance of Exterior Windows, Curtain Walls, Doors, and Impact Protective Systems Impacted by Windborne Debris in Hurricanes
• ASCE 7 Minimum Design Loads and Associated Criteria for Buildings and Other Structures, current edition