Florida Product Approval vs. Miami-Dade NOA: What It Means for Your Metal Roof

What is the difference between a Florida Product Approval and a Miami-Dade NOA?

Florida has two parallel systems for proving that a roof covering can go on a house. The first is the statewide Florida Product Approval, run under the Florida Building Code and listed by an FL number. A manufacturer has its product tested to the standards the code names, an engineer evaluates the results, a validator checks the work, and the approval is published with the tested profiles, fastening schedules, deck requirements and design pressures. A building official anywhere in the state outside the High-Velocity Hurricane Zone can accept that document at permit time without further review. The second system is the Miami-Dade Notice of Acceptance, or NOA. Miami-Dade County runs its own product control program with its own test protocols, and a product that will be installed inside the High-Velocity Hurricane Zone must carry a current NOA. A statewide approval does not substitute for it. The two documents can cover the same product, but they are issued by different bodies against different requirements, and one does not automatically produce the other. This is the plain fact a homeowner needs first: Interlock's Florida approval is NEMO P.E. Evaluated FL7263-R7, a statewide Florida Product Approval issued under the FBC 8th Edition, and it is non-HVHZ only. There is no Miami-Dade NOA for the Interlock system. That means Metal Roofing Florida does not serve Miami-Dade or Broward County. If your house is in Coral Gables, Homestead, Fort Lauderdale or Pompano Beach, this roof is not an option through Metal Roofing Florida.

What is the HVHZ and which Florida counties are in it?

The High-Velocity Hurricane Zone is a defined region in the Florida Building Code where the code applies stricter product testing, inspection and installation requirements than the rest of the state. It consists of two counties: Miami-Dade and Broward. That is the whole list. Palm Beach County, directly north of Broward, is not in the HVHZ even though it shares the same coastline and much of the same weather. Monroe County to the south is not in it either. Inside the zone, roofing products are tested to Miami-Dade protocols, and the Miami-Dade NOA is the document a building official expects to see. What confuses homeowners is that ASCE 7-22 design wind speeds and the HVHZ boundary are not the same thing. Broward is mapped at about 170 mph and Miami-Dade at about 175 mph under ASCE 7-22 Risk Category II, and the Florida Keys sit even higher at roughly 170 to 180 mph in Exposure D, yet Monroe is outside the HVHZ. Collier County on the Gulf side is mapped at about 170 mph as well and is not HVHZ. The HVHZ is a political and administrative boundary written into the code, not a contour on a wind map, and the approval system you need follows the county line, not the wind speed.

Does NEMO P.E. Evaluated FL7263-R7 cover Miami-Dade or Broward County?

No. NEMO P.E. Evaluated FL7263-R7 is explicitly a non-HVHZ approval. It was tested to UL 1897, UL 580 and TAS 125, evaluated by Robert Nieminen, P.E. of NEMO ETC, with UL LLC as the quality-assurance entity, and it is accepted by building departments across the rest of Florida. It carries no Miami-Dade product control approval, and the Interlock program does not offer a Miami-Dade NOA. A homeowner in Hialeah, Miramar, Weston or Deerfield Beach cannot use this approval to pull a permit, and no certified Interlock installer will be assigned to a project in either county. Some manufacturers hold both a Florida Product Approval and a Miami-Dade NOA for the same product line. Interlock holds the statewide approval only. If you live in Broward or Miami-Dade, you will need a manufacturer whose product carries a current NOA for the profile you want. Everywhere else in the state, from Jacksonville down the First Coast, across the I-4 corridor through Orlando and Tampa, down both coasts through Sarasota, Fort Myers, Naples, Stuart and West Palm Beach, and across the Panhandle, NEMO P.E. Evaluated FL7263-R7 is the document your building department will review. It lists the Shingle/Slate profile in nail-strip and nail-tab form, the Diamond profile, the Shake profile and the Hidden-Fastener Tile profile, in 0.019 to 0.027 inch aluminum. Standing seam is not listed in NEMO P.E. Evaluated FL7263-R7, so no one should tell you an Interlock standing seam roof carries a Florida approval. The certified installer assigned to your project pulls the permit under their own DBPR roofing license and submits the approval with the application.

What about Monroe County and the Florida Keys?

Monroe County is the awkward case and deserves a straight answer. The Keys are outside the HVHZ, so a statewide Florida Product Approval is the correct document in principle. But the ASCE 7-22 design wind speed in the Keys runs about 170 to 180 mph, and the exposure category is D, the open-water exposure that produces the highest pressures the code assigns. That combination pushes the required design pressures at eaves, rakes and corners to the upper end of what any roofing approval can deliver. FL7263-R7 publishes design pressures from -30.0 to -187.5 psf, but that range depends entirely on profile, fastening pattern and deck. A profile and fastening combination that comfortably covers a hip roof in Ocala may not reach the corner-zone pressure on a two-story house facing the Atlantic in Marathon or Islamorada. Whether a given Keys house can be roofed under this approval comes down to a pressure calculation for that specific building, and the answer is sometimes yes and sometimes no. For that reason projects in Monroe County are handled case by case. Metal Roofing Florida will look at the house, the roof geometry, the exposure and the calculated pressures before assigning a certified installer, and it will say no when the numbers do not work. A homeowner in Key Largo or Key West should expect that review rather than a quick yes.

How should a homeowner in Palm Beach, Collier or Lee County read the approval document?

If you live in Jupiter, Boca Raton, Naples, Marco Island, Cape Coral or Fort Myers, you are outside the HVHZ but inside some of the highest design wind speeds in the non-HVHZ state, roughly 160 to 175 mph on the Treasure Coast and Palm Beach and about 170 mph in Collier. The approval document is where you check that the roof you are buying matches those numbers, and there are four things to read in it. First, the profile. NEMO P.E. Evaluated FL7263-R7 covers several distinct products, and each has its own tested pressures. Confirm that the profile on your quote, whether Slate, Shingle, Shake or Hidden-Fastener Tile, is the profile named in the approval line the installer intends to use. Second, the fastening. The approval specifies ring-shank nails or wood screws and a pattern, and the tested pressure is only valid when that pattern is followed. Ask the installer which fastening schedule from the approval applies to your roof and where the perimeter and corner zones tighten up. Third, the deck. The approval requires a minimum of 15/32 inch plywood, with 19/32 inch for some configurations, and because Florida statute §553.844 also requires roof-deck re-nailing to the prescriptive schedule on a permitted reroof, the deck under your new roof will be inspected and, if needed, re-nailed before the metal goes on. Fourth, the design pressure. The installer or the engineer of record calculates the required pressures for your house from the ASCE 7-22 speed, the exposure and the roof geometry, then matches them to the approval table. Never accept a single number quoted for the whole product. The honest statement is that the approved pressure is set by profile and fastening, and the right comparison is the required corner-zone pressure for your house against the approved pressure for your profile at the specified fastening on your deck. When it checks out, you have a roof backed by the Guardian Lifetime Limited Material Warranty, with warranted wind resistance of 120 mph when installed to manufacturer specification, on an approval your building department has already accepted.

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