Miami-Dade Product Approvals for Roofing, Explained

A Miami-Dade product approval is the document that says a roofing material can be used in the High Velocity Hurricane Zone, and exactly how it has to be installed. Every product on a roof in Miami-Dade or Broward needs one: the tile or metal panels you see, the underlayment you don’t, and the adhesives and fasteners that hold it all down. If you’re comparing estimates, reading a permit or wondering why a roof costs what it does here, the approval is where much of the answer sits.

Why the approvals exist

Southeast Florida has the strictest roofing rules in the state. After a major hurricane exposed how many roofs came apart in high wind, the building code for Miami-Dade and Broward was rewritten around testing. Products now have to prove, in a lab, that they can resist wind uplift and wind-driven rain at the levels this part of the coast sees. Once a product passes, the approval records what was tested and how it was installed for the test. Installing it any other way means it hasn’t been proven.

Most of the approvals used here are issued by Miami-Dade County as a Notice of Acceptance, usually shortened to NOA. Florida also runs a statewide product approval system, and some of those approvals cover the hurricane zone as well. For a homeowner, the practical point is the same: each product needs an approval that covers use in the zone.

What’s in an approval

An approval is a long technical document, but a few parts are worth knowing.

• The product. The exact name, model or profile, and the manufacturer. A different profile from the same company may have a separate approval.
• Where it can go. The types of roof deck and slope the product is approved for. A product approved for a steep tile roof isn’t automatically approved for a low slope.
• The wind resistance. Design pressures the system was tested to. Your roof’s required pressure depends on its height, shape and location, and the system has to meet or beat it.
• The installation method. Fastener type and spacing, adhesive pattern, overlaps, underlayment required beneath. This is the part inspectors check on site.
• The dates. Approvals are issued for a period and then renewed, revised or allowed to lapse.

How approvals show up in your job

You’ll meet approvals at three points during a roof replacement.

The estimate. A careful estimate names each product, not just “tile” or “underlayment”. With the product named, you can ask for its approval number. We list ours on the estimate so you don’t need to ask.

The permit. The permit package includes the approvals for the products going on the roof, and the building department reviews them before work starts. If the product doesn’t have a current approval for the zone, the permit stalls.

The inspections. The inspector compares what’s on the roof against the approval. For tile and metal, that includes an inspection of the underlayment before the top layer goes on, and a final at the end. Fastener spacing, adhesive placement and edge details all get checked.

Why it changes the price

Approved products and approved methods cost more than the cheapest option on the shelf. A few examples of where the difference comes from:

• Underlayment. Approved underlayment systems for tile are heavier and often go down in more than one layer.
• Fastening. Closer fastener spacing at the edges and corners, where wind pulls hardest, means more fasteners and more labour.
• Edge metal and trim. Drip edge, valley metal and flashing have their own approval requirements.
• Time. Inspections during the job set the pace. The crew can’t cover the underlayment until it passes.

When one estimate comes in well below the others, the gap is often in the products. Ask each roofer which products they plan to use and for the approval numbers. If an estimate can’t name them, that’s useful information too.

Checking an approval yourself

You don’t need to read the whole document. With the approval number from your estimate, you can look it up on the county’s product control search and confirm three things:

1. The product name on the approval matches what’s on the estimate.
2. The approval is current, not expired.
3. It covers your kind of roof, for example tile on a sloped wood deck.

If anything doesn’t match, ask the roofer about it before you sign. A good answer is specific: a newer revision of the same approval, or a different product with its own number. A vague answer is a reason to slow down.

Approvals and repairs

The rules don’t switch off for small jobs. Replacing a section of underlayment, resetting a run of tile or swapping out flashing still needs approved materials, installed the approved way. Repairs done with leftover material from outside the zone, or with a method the approval doesn’t allow, can fail early and cause arguments with an insurer later. When we repair a roof, we match the approval the rest of the roof was built to whenever that product is still available, and we tell you when it isn’t.

Questions to ask any roofer

• Which products are you using, and what are their approval numbers?
• Which installation method does the approval call for, and is that what you’ll use?
• Who pulls the permit, and who schedules the inspections?
• What happens if an inspection fails?

The answers tell you a lot about how the job will go.

Where to go next

Our roof replacement page walks through a re-roof from tear-off to final inspection, and our roof repair service explains how we keep repairs within the approval. We build to the zone’s rules on every roof in Hialeah, Miami and Coral Gables, and every estimate lists the products and their approval numbers line by line.

Questions about this guide

• Can I buy roofing material online and have it installed?

  Only if it carries an approval for the High Velocity Hurricane Zone and the installer follows that approval. Plenty of material sold nationally doesn't have one. Check before you buy, because an unapproved product won't pass the permit review.

• What happens if a product's approval expires during my job?

  Approvals carry dates, and what matters is the approval in force when the permit is reviewed. If a product is close to its date, we check the renewal before ordering, and we choose a different product if the approval isn't current.

• Do repairs need approved products too?

  Yes. A repair in the zone still has to use approved materials, fastened the approved way. That's one reason a patch from someone outside the area can cause trouble later.