Do I need a Miami-Dade approved window in the Keys?

You are not required to have one — Monroe County works from statewide Florida Product Approval. Whether you want one is a different question, and here the answer is more often yes than it is anywhere else outside the HVHZ, because the calculated pressures are the highest in the state.

How do I know the quote used the right numbers?

Ask what design pressure was calculated for each opening and how it was derived. A single figure applied across the whole house, or a figure that matches what the contractor uses on the mainland, is the thing to question.

Will impact windows survive a direct hit?

They are tested to a defined standard and that standard is real. It is not a guarantee against any event, and we are not going to tell you otherwise in a county that has watched what happens when a storm arrives at full strength.

What we install · Impact Windows

The Hardest Numbers in Florida, and Nobody Is Checking Them For You

The main event. Monroe carries the state's highest design wind speeds while sitting outside the stricter approval regime, so every bit of the weight lands on getting the calculation right.

Book a measure Call (954) 807-3208

Give us the mile marker and tell us whether the living floor is up on piers. Those two answers shape the job more than the window does.

Highest

Monroe carries the highest design wind speeds in Florida

Not HVHZ

And it is governed by statewide approval, not a Miami-Dade NOA

One road

Everything arrives down US-1. We plan the job around that

Licensed

A licensed Florida general contractor

A product family that is fine in Homestead and short down here

The approved field is statewide, and a statewide approval is written to cover a very wide range of conditions. Plenty of units in that field satisfy the numbers comfortably in most of Florida and do not satisfy the numbers here, particularly at larger sizes. Nothing about that is misconduct — the product is legitimately approved, the contractor genuinely uses it everywhere, and the only thing that catches it is somebody actually calculating the pressure for this opening at this mile marker instead of carrying a habit south.

What we work out for every single opening

The calculated positive and negative pressure at this address.
Height above grade, which on an elevated house is not the ground floor.
Exposure, which here is effectively never sheltered.
Whether the approval holds at the size that is actually going in.
Whether an HVHZ-tested unit is the better answer for this opening.

Why the regime and the risk do not line up here

The High Velocity Hurricane Zone is defined in the code by county, and it covers Miami-Dade and Broward. It was drawn after Hurricane Andrew around where that storm did its damage. Monroe County sits immediately beyond it and carries higher design wind speeds than either.

The practical consequence is not that the Keys are under-regulated. Design pressures are calculated from the actual wind speeds, so the numbers your openings must meet are higher here than in Miami. What differs is the testing protocol behind the approvals, which means the checking has to be done on the calculation rather than assumed from the label.

How we handle it

01Calculate before selecting, rather than selecting and then justifying.
02Put the approval number against each unit on the schedule.
03Confirm the approval covers the real size, not just the product line.
04Order once, because a second order costs a week and a road trip.

We will tell you when a Miami-Dade tested unit is worth buying here, which is a strange thing for this website to say after arguing the opposite on the mainland. It is the same principle applied to different numbers: buy what the calculation calls for. On the mainland that usually means you are being oversold. In Monroe County it often means the opposite.

Said plainly

Where we stop

The rating covers a defined missile and a defined pressure cycle. It is a genuine tested standard rather than a promise of invulnerability, and in Florida's highest-pressure county that difference is worth stating rather than skating past.

FAQ

Common questions

Do I need a Miami-Dade approved window in the Keys?: You are not required to have one — Monroe County works from statewide Florida Product Approval. Whether you want one is a different question, and here the answer is more often yes than it is anywhere else outside the HVHZ, because the calculated pressures are the highest in the state.
How do I know the quote used the right numbers?: Ask what design pressure was calculated for each opening and how it was derived. A single figure applied across the whole house, or a figure that matches what the contractor uses on the mainland, is the thing to question.
Will impact windows survive a direct hit?: They are tested to a defined standard and that standard is real. It is not a guarantee against any event, and we are not going to tell you otherwise in a county that has watched what happens when a storm arrives at full strength.

Florida Keys specifics

Highest Wind, Lower Tier

The High Velocity Hurricane Zone covers Miami-Dade and Broward. Monroe County is not in it, and carries higher design wind speeds than either. The strictest test protocol does not apply where the numbers are hardest.

One Road In

Every material used in Monroe County arrives along one road. There is no second route, no nearby branch to run back to, and no way to absorb a mistake by sending somebody tomorrow.

There Is No Inland

In every other Florida market a buyer can move inland and pay less. In Monroe County that option does not exist. Every property is coastal, so the specification decisions that are optional elsewhere are not optional here.

Up on Piers

A great deal of Keys housing has its living floor raised on piers or columns. That raises height above grade, which raises the calculated pressure, and it turns straightforward access into a planning problem.

How We Work Here

We are based in Fort Lauderdale and the Keys are a long way down a single road. We work the county in planned blocks with crews lodged locally, and that has consequences worth stating up front.

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More what we install

Sliding Glass Doors

Keys sliders tend to be wide, they face open water, and on a great many houses they open onto a deck a full story above the ground. Every one of those raises the number the unit has to hold.

Impact Entry Doors

An approved entry door is one assembly — slab, frame, hinges, lock, threshold and glazing approved together. In Monroe County the part that fails first is almost never the part that was chosen carefully.

Impact Garage Doors

A double garage door is the largest opening in most houses. In the Keys it frequently sits at the ground level of an elevated structure, which changes what it is doing and what rules apply to it.

Next step

Find out what is actually wrong with it.

An inspection, photographs of what we found, and a written scope. If the honest answer is that it can wait another season, that is the answer you will get.

Book a measure (954) 807-3208