Impact Window Approval Concerns | Bigfoot Windows & Roofing

The Problem

Why Impact Window Approvals Go Wrong in South Florida

Most homeowners don’t realize a problem exists until the inspector arrives — or until they’re selling the house.

South Florida homeowners invest significant money in impact windows expecting the project to be finished, permitted, and done. What they don’t expect is a notice from the Miami-Dade Building Department flagging their installation as defective — or worse, discovering at closing that the windows were never permitted at all.

This happens more often than it should, and almost always for one of three reasons: the contractor pulled no permit, the product installed doesn’t match what the approved permit specified, or the physical installation deviated from the anchoring schedule required by the product’s Notice of Acceptance (NOA). Any of these is enough to trigger a mandatory correction — and in serious cases, a full removal and reinstallation. Understanding what actually causes these failures helps you ask the right questions before the project starts, not after.

Local Context

HVHZ Rules: Why Miami-Dade and Broward Are Different

The High-Velocity Hurricane Zone applies the strictest building code in the United States — and impact windows are its most scrutinized product category.

Florida’s High-Velocity Hurricane Zone (HVHZ) covers Miami-Dade and Broward counties and operates under a materially stricter code path than the rest of the state. Under Florida Building Code (FBC) Section 1609 and its HVHZ-specific provisions, all exterior glazing systems — including impact windows and doors — must be approved for use in the specific opening and wind zone where they are being installed.

Statewide, a Florida Product Approval (FL Number issued by the Florida Building Commission) is the baseline requirement. In the HVHZ, that baseline is not enough. Every product must also carry a Miami-Dade Notice of Acceptance (NOA) — a separate, more rigorous approval issued by the Miami-Dade Building Department’s Product Control Division. An FL Number without a corresponding NOA does not satisfy HVHZ requirements. This distinction trips up homeowners — and some contractors — every day.

Miami-Dade’s local amendments, including provisions under Section 8A-51 of the Miami-Dade County Code, layer additional requirements on top of the Florida Building Code. When a homeowner faces a construction defect dispute involving impact windows in Miami-Dade, those local amendments interact with statewide product approval rules and can expand both the inspector’s authority and the homeowner’s obligations to remedy non-compliant work.

Understanding the Defects

What Actually Makes an Impact Window Installation Defective

Defects fall into two categories: product defects and installation defects. They have different remedies.

Not all inspection problems are the same. The Miami-Dade Building Department distinguishes between a product that isn’t approved for the opening and an approved product that was installed incorrectly. Understanding the difference matters because the remedy is different.

Product defects under Florida Building Code Chapter 14 (Exterior Walls) and FBC Section 1609 mean the glazing system itself was not reviewed and approved for the conditions at that opening. If a contractor installed a window product that carries only a Florida Product Approval but lacks a Miami-Dade NOA, and the opening is in an HVHZ structure, that is a product compliance failure — not something a sealant bead can fix. The entire window must come out.

Installation defects are more common and more fixable. Every NOA specifies an exact fastener type, fastener diameter, embedment depth, and spacing schedule for the perimeter of the frame. The NOA also specifies shim requirements and sealant type. When a crew deviates from those specifications — even by spacing a screw a few inches farther apart than the NOA allows — the installation is non-compliant. An inspector catching this will issue a correction notice. The contractor returns, corrects the fastener schedule, and re-inspection is scheduled. This is the most common scenario and, when caught early, is typically resolved without removing the window.

Permit defects are the most damaging to homeowners. Installing impact windows in Miami-Dade without a permit is never legal — permits are not exempt for routine window replacement under Florida law. Work done without a permit may result in a Stop Work Order, a required demolition of the unpermitted installation, and potential fines. An after-the-fact permit (sometimes called a permit for existing work) is possible in some cases but requires a Special Inspector evaluation and carries no guarantee of approval if the installation is already non-compliant.

It is worth noting that because Darryl Henry Rosenbaum holds a Certified General Contractor (CGC1531370) license in addition to the Certified Specialty Contractor with a Glass & Glazing Specialty (SCC131153098), Bigfoot can handle structural scope that arises during an impact window project — including situations where an opening’s rough framing, lintel condition, or hurricane strap configuration requires correction before the window can be properly anchored to spec. This avoids the common problem of a glazing-only contractor discovering a structural issue and stopping work because it’s outside their license authority.

Inspection vs. Rejection

Correction Notice vs. Outright Rejection: What Each Means

A correction notice is not the end of the world — but a rejection for a non-approved product can be costly.

A correction notice means the inspector found something fixable. The product is approved, the permit is valid, but something in the physical installation deviates from the NOA. The contractor is responsible for correcting it, and you should confirm in writing that the correction was made and re-inspection passed before considering the job complete.

A rejection tied to a product approval failure is more serious. If the inspector determines the installed product does not carry a valid NOA for an HVHZ opening — or the design-pressure rating doesn’t match the opening’s required DP — the product typically must be removed. This is rare when a competent permitting contractor is used, because the permit review process catches product compliance issues before installation begins. It almost exclusively happens with unpermitted work or when a contractor substitutes a product without updating the permit drawings.

Product Compliance

How to Verify Your Impact Windows Are Actually Approved for Your Opening

NOA numbers are public record — anyone can look them up before installation begins.

Every valid Miami-Dade NOA has a unique number and is publicly searchable through the Miami-Dade Building Department’s Product Control online database. Before your contractor orders windows, ask for the NOA number for the specific product and series being installed at your home. Look it up yourself. Confirm:

• The NOA is listed as valid (not expired, not revoked).
• The product series and application type (single-hung, casement, horizontal roller) match what’s on your permit drawings.
• The design-pressure rating in the NOA meets or exceeds the design pressure required for your opening’s location and height.
• The installation details — fastener type, diameter, spacing, and substrate — match what your contractor intends to use.

If your home is within two miles of the coast, glass specification also matters for turtle-code compliance. Certain glass tints and thicknesses are required in coastal zones, and that requirement is separate from impact performance. For aluminum-framed impact windows — which Bigfoot recommends for South Florida’s HVHZ heat, salt air, and humidity based on field experience — the frame finish also matters: coastal installations require the 2605 finish designation; a 2604 finish in a coastal location voids the manufacturer’s warranty.

The Process

What Happens After an Inspection Failure — Step by Step

Knowing the sequence helps homeowners hold contractors accountable at each stage.

1. Inspector issues correction notice or rejection. The document specifies the deficiency code and the required corrective action. Request a copy from your contractor immediately.
2. Contractor reviews deficiency against NOA. A competent contractor compares the flagged items against the installation details in the NOA and prepares a corrective action plan.
3. Correction is performed. For installation defects, this typically means adding or repositioning fasteners, installing proper shims, or applying compliant sealant. For product defects, it may mean full removal.
4. Re-inspection is scheduled. The contractor requests a re-inspection through the Miami-Dade Building Department. The same permit of record covers the re-inspection.
5. Final approval issued. Once the inspector signs off, the permit is closed. You should receive a copy of the final inspection approval — keep it with your home records.

If a contractor refuses to acknowledge a failed inspection result, disputes the inspector’s findings without documented basis, or goes silent after the correction notice, those are serious red flags. The permit of record is the homeowner’s legal anchor — the contractor is responsible for delivering a passing final inspection under the permit they pulled.

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Who We’re Not the Right Fit For

Being honest about where we aren’t the best match saves everyone time:

• Homeowners who want the absolute lowest bid regardless of permit compliance. Every Bigfoot installation is fully permitted and inspected. If cost is the only driver and a permit feels optional to you, we are not the right contractor.
• Projects requiring manufacturer brands we do not carry. We install Mr. Glass and ES Windows as our primary impact window lines. If you have a strong preference for a brand we do not install, we are not the right fit — and we will tell you so upfront.
• Buyers who need a contractor to start work the same week without permit review. HVHZ permitting takes time. We will not skip that step. If your timeline cannot accommodate a proper permit process, we are not able to serve you correctly.
• Commercial high-rise projects requiring products outside our residential and mid-rise scope. If your project involves specialized commercial-grade systems beyond our current product lines, we will tell you that honestly rather than accept a project we cannot execute correctly.