Florida has required hurricane-resistant windows (or an approved equivalent like shutters) statewide since March 1, 2002, when the first edition of the Florida Building Code took effect. Miami-Dade and Broward counties got there first, mandating impact protection on new construction in 1994 after Hurricane Andrew. Whether the rule applies to your home depends on when it was built, where it sits, and what renovation work you’ve done since.
How Florida Arrived at the 2002 Date
Hurricane Andrew made landfall in August 1992 and caused roughly $27 billion in damage. Much of the destruction traced back to a single failure pattern: windows and doors blew in first, wind pressure got inside the structure, and roofs and walls then came apart from within.
South Florida responded locally. In 1994, a revised building code required impact-resistant windows or hurricane shutters on all new buildings in Miami-Dade and Broward. That local framework became the template for the statewide code that followed.
The Florida Legislature passed the Florida Building Code Act under Section 553.73 of the Florida Statutes, replacing a patchwork of local codes with one statewide standard.1Online Sunshine. Florida Statutes 553.73 – Florida Building Code The first edition took effect March 1, 2002, carrying forward the opening-protection concepts developed after Andrew. The code has been updated roughly every three years since, with the 8th edition (the 2023 code cycle) currently in force and a 9th edition in development for 2026.
Which Florida Properties the Rule Covers
The requirement is not uniform across the state. The code divides Florida into zones based on expected wind speeds, and the strictest opening-protection rules apply in two categories:
- High-Velocity Hurricane Zones (HVHZ): Miami-Dade and Broward counties. Products installed here need a Miami-Dade Notice of Acceptance (NOA) on top of standard Florida approvals.
- Wind-borne debris regions: Areas within one mile of the coastal mean high water line where the design wind speed meets the threshold set by ASCE 7, plus all of the HVHZ. Every exterior opening in these regions must have impact-resistant glazing or an approved protective covering.2UpCodes. 2023 Florida Building Code, Building – Chapter 16 Structural Design – Section 1609.1.2
Outside those regions, windows still need to be rated for the local design wind speed, but they don’t necessarily need to resist debris impact. In general: the farther south and the closer to the coast, the stricter the rules.
What Counts as Compliance
A common misconception is that Florida law forces you to install impact-rated glass specifically. It doesn’t. In wind-borne debris regions, every glazed opening — windows, sliding glass doors, skylights, and garage doors — must either be impact-resistant on its own or protected by an approved impact-resistant covering.2UpCodes. 2023 Florida Building Code, Building – Chapter 16 Structural Design – Section 1609.1.2
Impact-resistant windows use laminated glass: two panes bonded to a tough polyvinyl butyral (PVB) interlayer. When something hits them, the glass cracks but the interlayer holds the pieces in place, keeping the building sealed. Products have to pass testing under ASTM E1996 and ASTM E1886.3ASTM International. ASTM E1996-20 – Standard Specification for Performance of Exterior Windows, Curtain Walls, Doors, and Impact Protective Systems Impacted by Windborne Debris in Hurricanes4ASTM International. ASTM E1886-19 – Standard Test Method for Performance of Exterior Windows, Curtain Walls, Doors, and Impact Protective Systems Impacted by Missiles and Exposed to Cyclic Pressure Differentials Openings below 30 feet have to survive a large-missile test using a 9-pound 2×4; openings above 30 feet face a less demanding small-missile test.
The code also allows several alternatives to impact glass:5Florida Building Commission. Impact-Resistant Windows Fact Sheet
- Accordion shutters, mounted on tracks beside the window and folded closed when needed.
- Roll-down shutters, housed in a box above the window and lowered manually or by motor.
- Colonial and Bahama shutters, decorative options that double as storm protection.
- Storm panels, removable corrugated aluminum or steel sheets that bolt into permanently installed tracks.
- Plywood, allowed only in limited circumstances: 7/16-inch structural panels on certain single-family homes with a mean roof height of 33 feet or less, where ultimate design wind speed is 180 mph or lower. The plywood must be precut, predrilled, and attached with permanently installed corrosion-resistant hardware.6UpCodes. 2023 Florida Building Code, Building – Chapter 16 Structural Design – Section 1609.1.2 Exception 1
Whichever route you choose, the product has to be tested and approved. Compliant items carry a Florida Product Approval (FL#) or, in the HVHZ, a Miami-Dade NOA. Random plywood from the hardware store the day before a storm will not satisfy the code in most situations.
Do Older Florida Homes Have to Retrofit?
Homes built before March 2002 are not automatically required to install hurricane windows. The Florida Building Code applies prospectively to new construction, and existing buildings fall under the Florida Existing Building Code, which only triggers upgraded requirements when certain renovation thresholds are crossed.1Online Sunshine. Florida Statutes 553.73 – Florida Building Code
The key trigger for window work is the glazing replacement threshold. If you replace glazed openings and the total area replaced exceeds 25 percent of all glazed openings in the dwelling, the replaced components must meet current code.7UpCodes. 2020 Florida Existing Building Code – Chapter 7 Alterations Level 1 – Section 707.4 Stay under 25 percent and you can replace windows without triggering the impact-protection rules. Cross it and the new openings have to meet current standards.
Roofing work has its own thresholds. Replacing more than 25 percent of the roof area within 12 months requires the entire roof system to meet current code, and in wind-borne debris regions it can trigger roof-to-wall connection upgrades on buildings with an insured value of $300,000 or more.8UpCodes. 2020 Florida Existing Building Code – Chapter 7 Alterations Level 1 – Sections 706.1.1 and 706.8 That doesn’t directly force window upgrades, but a major reroof can pull other obligations along with it.
How to Check Whether Your Windows Already Comply
If you’re buying a Florida home or just unsure what you already have, there are several ways to confirm whether your windows meet the current code:
- Look for permanent markings on the glass or frame. Impact-rated windows carry labels or etchings showing the manufacturer, product approval number (FL# or NOA#), and design pressure rating. They’re usually in a corner of the glass or on a label in the frame track.
- Search the approval databases. Florida’s product approval database and Miami-Dade County’s product search tool let you look up an approval number and confirm the product meets current standards.
- Pull building permits. Your local building department keeps records of permits and inspections, so a prior impact-window installation done under permit should show up with the product details and inspection results.
- Hire a professional. A licensed building inspector or window contractor can physically assess the windows and confirm compliance with the code for your specific wind zone. This matters most for older installations where the labels have worn off.
Why the Rating Matters Beyond Code Compliance
Florida law requires every residential property insurer to include actuarially reasonable discounts for wind mitigation features, and opening protection is one of the most heavily weighted factors.9Online Sunshine. Florida Statutes 627.0629 – Residential Property Insurance Rate Filings To claim the discount, you need a completed Uniform Mitigation Verification Inspection Form (OIR-B1-1802), filled out by a qualified inspector such as a licensed general contractor, building inspector, architect, or engineer. The form is valid for five years unless you make material changes to the structure.10Florida Office of Insurance Regulation. Uniform Mitigation Verification Inspection Form OIR-B1-1802
One detail trips homeowners up constantly: the form evaluates the weakest opening in the house. Impact windows on every window but one unprotected garage door or skylight can drag the whole rating down. If you’re upgrading partly for insurance savings, every opening on the house counts.