You’ll see “rated to 175 mph” and “Miami-Dade approved” on a lot of roofing materials, and they sound reassuring. But what do they actually mean for the roof over your head? Here’s a plain-English breakdown of the two terms that matter most for a Homestead metal roof.
First, the Notice of Acceptance (NOA)
A Notice of Acceptance is a document issued by Miami-Dade County that says a specific product — a panel, an underlayment, a fastener system — has been tested and approved for use in the High-Velocity Hurricane Zone. It’s not a marketing label a manufacturer hands out to itself. It’s an official approval backed by required testing.
An NOA spells out the conditions under which the product is approved: how it must be installed, what it can be installed over, what fasteners and spacing are required, and what wind loads it’s good for. In other words, the NOA doesn’t just bless the product — it defines the right way to use it. In Homestead, every roofing component that goes on your home should be covered by a valid NOA.
Why that matters to you
The NOA system is your protection as a homeowner. It means the materials on your roof aren’t experimental and aren’t borrowed from some milder climate — they’ve been proven for the conditions South Dade actually faces. When we hand you documentation on your roof, the NOA numbers are part of what tells your insurer, your inspector, and you that the roof was built right.
Now, the 175 mph wind rating
When a roofing system is described as rated to 175 mph, it means the assembly has been engineered and tested to resist the forces generated by sustained winds at that speed without failing. Hurricane wind doesn’t just push on a roof — it creates powerful uplift, effectively trying to peel the roof off the building. A wind rating reflects how much of that force the system can take.
For perspective, 175 mph is squarely in the range of a major hurricane. A roof rated to that level is built for the worst this coast realistically throws at it.
The crucial catch: it’s the whole system, not just the panel
Here’s the part that matters most, and the part that’s easy to miss. A wind rating belongs to the entire roof assembly, not to the metal panel alone. The rating assumes a specific deck, a specific underlayment, specific fasteners at a specific spacing, and specific edge and flashing details — all installed exactly as the approval requires.
Put a “175 mph panel” on with the wrong fasteners, too few of them, or sloppy edge details, and you do not have a 175 mph roof. You have a panel that could have been part of one. This is precisely the lesson Hurricane Andrew taught: roofs fail at their connections and edges, not usually in the middle of the panel. A wind rating is only real if the installation lives up to it.
That’s why, when you’re comparing roofers, the right question isn’t only “what’s it rated for” but “will it be installed to earn that rating.” With us, the answer is yes — we install systems to their NOA requirements so the rating on paper is the rating on your roof.
How the pieces fit together
- The NOA approves the product for HVHZ use and defines how to install it.
- The wind rating tells you how much force the properly installed assembly can resist.
- The installation is what turns an approved, rated product into an actual rated roof.
- The permit and inspection are how Miami-Dade verifies it was done right.
All four work together. Skip or shortcut any one of them and the protection you’re paying for starts to slip.
What to ask for
When you get a metal roof in Homestead, it’s reasonable to ask your roofer to confirm the systems carry valid Miami-Dade NOAs, to explain the wind rating of the assembly being installed, and to provide documentation when the job is done. A roofer who builds to code will have no trouble with any of that. We provide it as a matter of course, because it’s your roof and you deserve to know exactly what’s protecting your home.
The bottom line
“Rated to 175 mph” and “Miami-Dade approved” aren’t just slogans — they’re a system designed to make sure your roof can do its job when a hurricane arrives. But they only mean something when the roof is actually installed to the standard behind the words. That’s the whole game, and it’s how we play it.
CTA: Want a roof rated for what South Dade really faces? Call (305) 767-7681.