TL;DR: A Florida product approval number is a state-assigned identifier proving a window product passed standardized performance testing. The number ties a specific product, frame type, and installation condition to a public record at the Florida Department of Business and Professional Regulation. Missing or mismatched numbers can cause permit rejections and wind mitigation complications.
What Happened
Florida requires that windows and doors installed in permitted work carry a product approval under the Florida Building Code. The approval is managed through the Florida Building Commission, accessible at floridabuilding.org. Each approval record is assigned a number, typically formatted as FL followed by five digits and a decimal revision number, for example FL12345.1.
The number is not a manufacturer's marketing claim. It reflects a third-party testing lab's results submitted to and accepted by the state. The approval record lists the exact product name, manufacturer, approval holder, test standards used, design pressures, impact ratings (if applicable), and the installation instructions that must be followed for the approval to remain valid.
When a contractor pulls a permit for window replacement, the product approval number goes on the permit application. The inspector verifies the installed product matches that approval before signing off.
Why It Matters
It defines the conditions under which the product is legal to install. An approval is not blanket permission. Each record specifies design pressure limits, glazing type, frame material, maximum unit sizes, and anchor spacing. Installing a window outside those parameters, even the same model in a larger size, can void the approval for that specific opening.
It affects your wind mitigation report. A wind mitigation inspector records the product approval number for openings on your report. If a number cannot be verified against the state database, or if the installed product does not match the listed specifications, the inspector may not be able to credit that opening as a protected one. That outcome can affect the discount your insurer calculates, though actual premium changes depend on your policy and carrier.
It matters at resale. A buyer's inspector or lender may request permit documentation. If the product approval number on the permit does not match the installed product, it can create a title or closing complication. See our notes on open permits and closing issues at What Happens to an Open Permit When You Sell a Florida Home.
It is revision-sensitive. Approvals are updated when manufacturers submit design changes. A revision suffix like .1 or .2 on the approval number indicates a newer submission. An older revision may still be valid for products installed under that version, but a contractor specifying current products should reference the current revision.
What the Number Does Not Tell You
The product approval number does not confirm the product is appropriate for your specific home. Design pressure requirements vary by building height, exposure category, location on the structure (corner vs. field), and local wind speed. A product with a valid approval may not meet the required design pressure for your opening. That calculation belongs to the engineer of record or the contractor using jurisdiction-specific tables.
The number also does not confirm installation quality, warranty coverage, or energy performance ratings. Those are documented separately through the NFRC label, the manufacturer's written warranty, and the contract scope of work.
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What We Don't Know Yet
The Florida Product Approval database is maintained by the state, and approval records can be modified, expired, or voluntarily withdrawn by manufacturers. The state does not notify homeowners when an approval is revised after installation. There is no public standard for how long an insurer will accept a wind mitigation report citing an older approval revision before requiring reinspection.
Approval requirements for certain product categories, including impact-resistant skylights and specialty glazing configurations, continue to evolve as the Florida Building Code is updated on its standard cycle. Provisions in the 2023 Florida Building Code cycle may differ from what applied when your home's windows were last permitted.
What to Do About It
Step 1: Locate your existing documentation. Your permit package or shop drawings should list the product approval number. If you had impact windows installed and received shop drawings, the approval number appears on the glazing schedule. Our article on 9 details to review before approving window shop drawings covers what to look for in that document set.
Step 2: Verify the number in the state database. Go to floridabuilding.org, navigate to Product Approval, and search by the FL number or manufacturer name. Confirm the listed product name matches what was installed, check the design pressure values, and note the current revision.
Step 3: Compare to your opening requirements. Your local building department or a licensed contractor can tell you the required design pressure for each opening based on your structure's wind speed zone and exposure category. If the approved product's design pressure meets or exceeds what is required, you are in compliance for that specification.
Step 4: Flag discrepancies before a wind mitigation inspection. If you notice a mismatch between the installed product and the approval record, address it with a licensed contractor before scheduling a wind mitigation inspection. Correcting documentation after the fact is more difficult than getting it right during the permit process.
If you are planning new hurricane impact window or impact door installation, the product approval number for the specified product should appear in your contract and on the permit application. Window Guys of Florida has worked with products from manufacturers including PGT, CGI, SIW, and ES; product approvals for these brands can be verified in the state database. You can request an estimate to begin reviewing product specifications for your project.
Review opening-protection options before storm season.
The performance and responsibilities for permits, engineering, documentation, installation, and inspections depend on the exact assembly and written project scope.
Frequently asked questions
Where do I find the product approval number for windows already installed in my home?
Check your original permit package, the shop drawings from the installation, or the label affixed to the window unit itself. If none of those are available, a licensed contractor can sometimes identify the product from visible markings and look up the corresponding approval in the state database.
Can a product approval number expire or become invalid after installation?
An approval can be withdrawn or revised by the manufacturer or the state, but work permitted and inspected under a valid approval at the time of installation generally remains code-compliant for that permit. The concern arises when older approvals are cited on new permit applications or wind mitigation reports, where inspectors and insurers may look for current revision status.
Does a Florida product approval number apply to every county in the state?
The state approval is the baseline, but local jurisdictions can adopt amendments. Miami-Dade County, for example, has its own Notice of Acceptance system with stricter requirements that may apply in addition to the state approval. Always confirm with the local building department which approvals are required for your specific address.
Is a higher design pressure on the product approval always better for my project?
A higher design pressure rating means the product was tested to withstand greater force, which can be an advantage in high-exposure locations. However, the required design pressure for your specific opening is determined by your location, building height, and opening position, so the goal is meeting or exceeding the required value, not simply maximizing the rating.
