Florida has the most stringent commercial glazing code requirements in the United States. The combination of high design wind speeds, mandatory impact resistance testing, and the dual product approval system in South Florida's High Velocity Hurricane Zone creates a compliance framework that is both rigorous and — for contractors unfamiliar with it — a common source of inspection failures and project delays.
Why Florida Glazing Code Is Different
Most states regulate commercial glazing primarily through the International Building Code (IBC), which references ASTM standards for structural performance and safety glazing. Florida adopts the IBC but layers its own requirements on top of it through the Florida Building Code (FBC) — specifically Chapter 16 (Structural Design) and the High Velocity Hurricane Zone provisions that apply to Miami-Dade and Broward counties.
The key distinction in Florida is that exterior glazing is not just a structural element — it's a life-safety element in a hurricane environment. Glazing that fails during a hurricane event allows wind pressure to enter the building envelope, which can cause catastrophic structural failure of the roof system. This is why Florida mandates impact-resistance testing for exterior glazing in wind-borne debris regions — not just structural performance under static or dynamic wind loads.
Florida's Wind-Borne Debris Region
Florida's wind-borne debris region is defined in the Florida Building Code based on design wind speed. Most of Florida's peninsula is within a wind-borne debris region requiring impact-resistant glazing or an approved storm protection system (hurricane shutters or screens). The entire state south of Orlando, and most coastal areas statewide, fall under these requirements.
Within the wind-borne debris region, exterior glazing must either:
1. Use impact-resistant glazing with a valid Florida Product Approval demonstrating compliance with impact resistance testing, or
2. Be protected by an approved storm protection system (shutters, screens) when the building is unoccupied during a storm event. For commercial buildings that must remain operational or occupied, this option is rarely acceptable.
HVHZ vs Standard Wind Zones
The Florida Building Code distinguishes between two regulatory environments for commercial glazing: the High Velocity Hurricane Zone (HVHZ) and the rest of the state.
High Velocity Hurricane Zone (HVHZ) covers Miami-Dade and Broward counties. In HVHZ, the Florida Building Code incorporates the Miami-Dade County Building Code requirements, which are administered locally. Every exterior glazing product in HVHZ must carry a Miami-Dade Notice of Acceptance (NOA) — issued by Miami-Dade County's Product Control Section after testing to the TAS protocols.
Outside HVHZ, the standard Florida Product Approval system administered by the Florida Department of Business and Professional Regulation (DBPR) applies. Products are tested to ASTM standards — typically ASTM E1996 for wind-borne debris impact resistance and ASTM E1886 for the test procedure. A Florida PA is required for every exterior glazing product.
Product Approval: Florida PA vs Miami-Dade NOA
Florida Product Approval (PA) is issued by the DBPR and is valid statewide. It confirms the product has been tested and approved under the Florida Building Code. A Florida PA includes the product description, approved use conditions, maximum design pressures, anchor spacing requirements, and installation instructions. Every exterior glazing product installed in Florida must have a current Florida PA on record — and the installed configuration (glass type, frame size, anchor spacing) must fall within the PA's approved parameters.
Miami-Dade NOA is issued by Miami-Dade County's Product Control Section and is required in addition to the Florida PA for any product installed in HVHZ. The NOA testing protocol is more rigorous: TAS 201 (Large Missile Impact) uses a heavier missile and more demanding impact test than the ASTM E1996 used for Florida PA. TAS 202 tests uniform static air pressure resistance. TAS 203 tests cyclic wind pressure loading — simulating the repeated pressure fluctuations of a hurricane wind field. A product can have a Florida PA without having a Miami-Dade NOA. In HVHZ, only the NOA is sufficient.
Large Missile Impact Testing
Large Missile Impact testing is the defining requirement of Florida's commercial glazing code in wind-borne debris regions. The test fires a 9-pound, 8-foot 2x4 lumber piece at the glazing assembly at 50 feet per second — simulating the most common and damaging form of wind-borne debris in a hurricane: structural lumber from a neighboring building or construction site.
To pass, the glazing assembly must not allow penetration of the missile through the glazing, and must maintain weather resistance through the subsequent static and cyclic pressure testing that follows. Standard annealed or tempered glass fails this test without exception — it breaks and allows penetration. Laminated glass with an appropriate interlayer passes by absorbing the impact and holding the broken glass in the frame without penetration.
For commercial applications, the standard impact-resistant specification is laminated glass with a 0.090-inch (90-mil) PVB or ionoplast interlayer for Large Missile-rated applications. The interlayer thickness, glass thickness, and frame specification must all align with the product approval data for the specific system being installed.
What Happens When Glazing Fails Inspection
A failed glazing inspection stops the project at that trade inspection milestone. The building official issues a correction notice identifying the deficiency. Common causes of glazing inspection failures in Florida include:
Missing product approval documentation. The glazing sub failed to pull the Florida PA or Miami-Dade NOA documentation for the installed product, or the inspector cannot verify the installed configuration matches the approved product data.
Non-approved product installed. The glazing sub substituted a product without obtaining a new PA or NOA for the substituted system — or the substituted product lacks the required impact resistance certification for the wind zone.
Anchor spacing outside PA limits. The installed anchor spacing exceeds the maximum permitted under the product approval for the design wind pressure at the building location. This is a common error when a sub uses standard catalog anchor spacing rather than calculating the required spacing for the specific project's design pressures.
Incorrect glass specification. Standard tempered glass installed where impact-rated laminated glass is required, or incorrect interlayer specification.
Resolving a failed glazing inspection requires either providing documentation that the installed product is compliant or replacing the non-compliant glazing. In HVHZ, a failed inspection can hold the certificate of occupancy until every opening is verified. On a project with hundreds of openings, this is not a minor correction — it is a significant schedule and cost event.
ACG's Approach to Florida Code Compliance
American Commercial Glass has operated exclusively in Florida for 5+ years, delivering glazing scope on 350+ commercial projects across all of the state's wind zones — including HVHZ in Miami-Dade and Broward. Our standard submittal package includes Florida PA documentation and Miami-Dade NOA documentation (where applicable), product approval numbers, anchor calculations sealed by a Florida-licensed PE, and installation detail drawings for every system on the project. We don't discover code compliance gaps at inspection — we document them at submittal.
Send us your plans. We'll return a scope with code-compliant system specifications for your wind zone within 48 hours.
Frequently Asked Questions
What is the difference between HVHZ and standard wind zones in Florida?
The High Velocity Hurricane Zone (HVHZ) covers Miami-Dade and Broward counties. Buildings in HVHZ must use glazing products with Miami-Dade NOA approval — tested to TAS 201 (Large Missile Impact), TAS 202 (Uniform Static Air Pressure), and TAS 203 (Cyclic Wind Pressure Loading). Outside HVHZ, Florida glazing products must meet Florida Building Code impact requirements via Florida Product Approval, which uses ASTM test methods rather than TAS protocols.
What is Large Missile Impact testing for commercial glazing?
Large Missile Impact testing (TAS 201 in HVHZ, or ASTM E1996 elsewhere in Florida) simulates wind-borne debris impact during a hurricane — specifically a 9-pound, 8-foot 2x4 at 50 feet per second. To pass, the glazed assembly must not allow penetration and must maintain weather resistance through subsequent pressure cycling. Standard tempered glass fails this test. Laminated glass with an appropriate interlayer (typically 0.090-inch PVB or ionoplast) passes when properly specified and installed per the product approval data.
What happens if commercial glazing fails inspection in Florida?
A failed glazing inspection stops the project at that trade inspection milestone. Common causes include missing or incorrect Florida PA/NOA documentation, non-approved products, anchor spacing outside PA limits, or incorrect glass specification. Resolving a failure requires either proving the installed product is compliant or replacing the non-compliant glazing. In HVHZ, a failed inspection can hold the certificate of occupancy until every opening is verified — a significant schedule and cost event on a large project.