If you've gotten a quote for impact windows or a new roof in Broward or Miami-Dade, you've probably seen three letters - NOA - next to a long approval number. It's one of the most important things on the paperwork and one of the least explained. Here is what a Miami-Dade NOA actually is, why a product can be "hurricane rated" and still be illegal on your house, and how to check that what's being installed is genuinely approved.
What a Miami-Dade NOA actually is
NOA stands for Notice of Acceptance. It is a document issued by Miami-Dade County's Product Control Section certifying that a specific product - a window, a door, a roof tile, an underlayment, a fastener - has passed the testing required for use in the High-Velocity Hurricane Zone (HVHZ). Each NOA carries a number, an expiration date, and a detailed spec sheet describing exactly how the product must be built and installed to stay approved.
- Issued by Miami-Dade County (Regulatory and Economic Resources, Product Control)
- Certifies one specific product, tested to HVHZ standards
- Valid for a set term - typically five years - and must be current
- Lists the exact conditions (frame material, glass thickness, fastening pattern) that make it valid
Why "statewide approved" isn't good enough here
This is the part that catches homeowners out. Florida has a statewide product-approval system (the "FL" number), but most statewide approvals are based on national ASTM standards that are less demanding than the HVHZ's. Broward and Miami-Dade are Florida's only two High-Velocity Hurricane Zone counties, and here a product must carry either a Miami-Dade NOA or a Florida Product Approval that is specifically rated for the HVHZ. A plain statewide approval is not enough.
In other words, a product can be genuinely "hurricane rated" for Orlando or Tampa and still be illegal to install on your house in Hollywood or Miami. This is the single most expensive misunderstanding in South Florida home improvement.
What the NOA actually proves - the testing behind it
An NOA is not a sticker a manufacturer buys. To earn one, the product is put through the HVHZ Testing Application Standards (TAS), which are tougher than the statewide tests:
- TAS 201 (large-missile impact) - a 9-lb 2x4 is fired at the product at roughly 50 feet per second to simulate flying debris
- TAS 202 (uniform static pressure) - the product is loaded to its rated design pressure without failing
- TAS 203 (cyclic wind pressure) - the product endures roughly 9,000 pressure cycles, mimicking the hours a structure flexes during a hurricane
Passing all three is what separates a true HVHZ product from one that merely looks the part.
Which products need an NOA
In the HVHZ, opening protection and the entire roof assembly are covered. If it is part of the building envelope, it almost certainly needs approval:
- Every glazed opening - impact windows, impact doors, sliding glass doors, skylights
- Permanent hurricane shutters used in place of impact glass
- Roof coverings - tile, shingle, metal panel - and the underlayment beneath them
- Fastening systems and mounting hardware, including solar-panel attachments
And it is not just the product in isolation. The NOA specifies how it must be installed - the fastener type, spacing and substrate. Install an approved window the wrong way and it is no longer covered.
How to read and verify an NOA (as the homeowner)
You do not have to take the contractor's word for it. A legitimate installer will hand you the NOA number without hesitation. To check it yourself:
- Ask for the NOA (or HVHZ-rated FL approval) number for the exact product on your quote
- Look it up on Miami-Dade County's online Product Control search, or the Florida product-approval database, and confirm it is current - not expired
- Match the details - the frame material, glass type and installation method on your job should match what the NOA describes
- Confirm the contractor is licensed for the work at myfloridalicense.com
Renomatix is not affiliated with, endorsed by, or acting on behalf of any government agency or program.
What happens at permitting and inspection
The NOA number goes onto the HVHZ Uniform Permit Application - the special form Broward and Miami-Dade use that the rest of Florida does not. A full copy of the NOA has to be available at the job site for the building inspector, who verifies that the installed product matches the approval. An installer who cannot produce a current NOA for the exact product on your roof or in your window openings cannot legally pass the inspection or close the permit - which means the work is not finished, no matter how it looks.
Red flags when a contractor can't produce one
If a quote is vague about product approvals, treat it as a warning sign. Watch for:
- "It's hurricane rated" with no NOA or FL number to back it up
- An NOA number that is expired, or that describes a different product than the one being installed
- Reluctance to put the product approval in writing on the contract
- A price that is well below every other bid - often a sign of a non-HVHZ product or an unpermitted job
Unpermitted or non-compliant work can fail inspection, void insurance wind-mitigation credits, and become a costly problem when you sell the home.
Frequently asked questions
Does a Miami-Dade NOA work in Broward County?
Yes. Broward accepts Miami-Dade NOAs, and a Miami-Dade NOA is recognized across the HVHZ and statewide. Broward also issues its own approvals, but a current Miami-Dade NOA for the exact product is accepted here.
Is a statewide Florida Product Approval the same thing?
Not necessarily. A standard statewide (FL) approval based on national ASTM tests is not enough for the HVHZ. In Broward and Miami-Dade the product needs a Miami-Dade NOA or an FL approval specifically rated for the HVHZ.
How do I know if an NOA is still valid?
NOAs carry an expiration date and are typically valid for five years. Look the number up on Miami-Dade County's Product Control search and confirm it has not expired and matches the product being installed.
Do impact windows and roofs both need an NOA?
Yes. Every glazed opening and every roofing component - tile, shingle, metal panel, underlayment and fasteners - must carry a current HVHZ approval in Broward and Miami-Dade.
Getting started
The NOA is where a lot of South Florida projects quietly go wrong - a product that is fine two counties north can fail inspection here. The simplest protection is to work with contractors who deal with HVHZ approvals every day and put the numbers in writing. Renomatix is a free service that connects Broward and Miami-Dade homeowners with licensed contractors in our network who work the HVHZ - so you can compare written quotes, see the product approvals up front, and choose with confidence. One request, several quotes, zero cost to you. Financing is available for qualifying homeowners - no upfront cost* (*third-party financing, subject to credit approval; not all homeowners qualify). Verify any contractor's license at myfloridalicense.com.