Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Window Replacement Across North Key Largo
Window replacement in North Key Largo runs $850-$2,400 per opening for impact-rated units, installed, with full-frame work on stilt homes starting around $1,400. Most jobs take two to four weeks from measure to completion once permits clear. If you live between Card Sound Road and the Ocean Reef Club gate, you already know the salt air eats aluminum frames faster here than almost anywhere in the Keys. Call (954) 280-4413 and we’ll walk you through exactly what your house needs, what it costs, and how long it takes.
We work in North Key Largo every week. We know the stilt homes off Ocean Reef Drive, the older concrete-piling houses near Harry Harris Park, and the custom estates behind the Ocean Reef gate. Our crews are local, our estimators measure every opening twice, and we file the Monroe County HVHZ paperwork before we order a single window.
Why TruePane Windows & Doors Is North Key Largo’s Preferred Window Replacement Company
The Keystone Standard is how we work, and it’s simple to understand. Every window we install gets both manufacturer warranty layers registered in writing, with the durations stated, before our truck leaves your driveway in North Key Largo. That means no boilerplate warranty card that disappears when the fogged seal shows up three years later. Dale Kessler founded this company on a rule that still governs every install: if the pane is not true, the job is not done.
We’ve been answering the phone with a live person 24 hours a day since the beginning. Not a voicemail tree, not a regional call center. When you call about a window replacement in North Key Largo, you talk to someone who knows the difference between a NOA-approved PGT and a big-box special that won’t pass a Monroe County permit review. That matters on an island where every opening faces bi-directional salt spray and hurricane wind loads.
Our technicians are background-checked and uniformed. They work in your North Key Largo home the way they’d work in their own mother’s house. We price the job on paper before we start, no surprise line items on the bill, and most window replacements are completed in a single visit once the glass arrives.
Our Window Replacement Services in North Key Largo
Here’s what we actually do in North Key Largo, house by house, opening by opening, including Sliding & Patio Doors in North Key Largo. Every job starts with the same question: what’s the existing frame condition, and what does Monroe County require for that opening?
Full Frame Replacement
Full frame replacement means the old frame comes out down to the rough opening. We see this most often on North Key Largo stilt homes built in the 1960s and 1970s, where original aluminum frames have corroded to white powder at the jambs. Once the frame is gone, we inspect the opening for water intrusion, flash it properly, and set a new impact-rated unit that meets HVHZ code and carries a Miami-Dade NOA. This is the right call when the frame is the problem, not just the glass.
A full-frame job in North Key Largo typically runs $1,400-$2,400 per window depending on size, accessibility, and manufacturer line. Elevated stilt homes with open subfloor space under the living area usually make access straightforward, which helps keep labor costs in check.

Insert Window Replacement
Insert replacement, sometimes called pocket replacement, leaves the existing frame in place and sets a new sash inside it. On North Key Largo homes where the aluminum frame is still sound, this is a faster and more affordable option, usually $850-$1,600 per opening for impact-rated units. But here’s what we tell every homeowner before we quote this: if there’s visible corrosion at the sill or jamb, an insert is a temporary fix. Salt from both the bay and the ocean works its way into compromised frames and degrades the new sash seal within a few years. We’ll tell you honestly if an insert makes sense, or if you’re better off going full frame now and not paying twice.

Storm Window Replacement
Storm windows are not a substitute for HVHZ impact-rated glazing in North Key Largo, and we’ll say that plainly. Monroe County code requires impact-rated protection on every exterior opening. What we install here is true impact-resistant glass systems, including Glass Railing Systems in North Key Largo when specified, often laminated glass set in reinforced frames, that are engineered to survive a Category 5 wind event and the debris it throws. These run $1,100-$2,300 per opening depending on size and design pressure rating. On the ocean side of North Key Largo, we typically specify higher design pressures than we might on a canal lot, because the exposure is real and the wind doesn’t slow down before it hits your house.

Energy-Efficient Upgrade
Humidity above 70 percent year-round means your windows in North Key Largo are doing double duty: keeping water out during storms and keeping conditioned air in during the nine months of the year your AC is running. Low-E coatings, argon fill, and thermally broken frames are standard on what we quote, not a premium upsell. A typical energy retrofit with Energy-Efficient Windows in North Key Largo on a three-bedroom home runs $12,000-$28,000 all-in for full-frame impact units, depending on opening count and manufacturer line. The payoff is lower humidity load on your HVAC and a house that no longer feels damp even when the air is running.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in North Key Largo
We’re an authorized installer for more than a dozen manufacturer lines, including, PGT, CGI, ES Windows, and ECO Window Systems. When you work with us on a window replacement in North Key Largo, we quote manufacturer lines side by side on paper, so you see exactly what you’re buying and what each option costs. That matters more than most people realize, because not every line carries the HVHZ design pressures Monroe County requires, and not every “impact window” quote includes the same glass package. We’ll help you sort through it without the sales fog.
Common Window Replacement Problems We See in North Key Largo Homes
Salt air and hurricane code create a specific set of failure modes here. These are the ones we fix most often:
- Corroded aluminum frames on stilt homes: Original single-pane aluminum windows from the 1960s and 70s oxidize to white powder at the jambs and sills, especially on the bay side where tidal air sits against the frame. Once the frame is compromised, the glass is on borrowed time.
- Non-impact glazing that won’t pass a Monroe County permit audit: We regularly see homes where a previous owner installed standard insulated double-panes to save money. When the house sells or the county inspects, those openings fail HVHZ review and must be fully torn out and replaced.
- Ocean Reef Club board rejections for exposed fasteners: The club’s architectural review board enforces specific aesthetic standards, including no visible screws or fasteners on window frames. Standard installation methods get flagged, and the contractor has to redo the work.
- Fogged seals within a few years of an insert job: When an insert replacement goes into a frame that’s already carrying salt corrosion, the new sash seal breaks down quickly. North Key Largo’s bi-directional salt load means the existing frame condition is the single biggest factor in how long the new window lasts.
Pricing for Window Replacement in North Key Largo, FL
Here are honest ranges for North Key Largo, based on jobs we’ve completed on the island:
| Scope | Typical Range (Installed) |
|---|---|
| Insert replacement, impact-rated, per window | $850-$1,600 |
| Full-frame replacement, impact-rated, per window | $1,400-$2,400 |
| Storm window / high design-pressure laminate, per opening | $1,100-$2,300 |
| Whole-house retrofit, 3-bed stilt home | $12,000-$28,000 |
What moves the number: opening count, access difficulty on elevated homes, manufacturer line, and whether Ocean Reef Club architectural review is in play (which adds lead time, not cost to us, since we file the submittal as part of the job). We offer a free written repair estimate, a maintenance check, and a permanent 5 percent discount for seniors and veterans. Call (954) 280-4413 for a free, written, line-item estimate.
The Dual-Review Reality of North Key Largo Window Replacement
Every window replacement in North Key Largo must pass two separate review layers, and most window companies never mention either one until the job stalls. Monroe County requires High Velocity Hurricane Zone impact-rating documentation, specifically a Miami-Dade NOA (Notice of Acceptance) on every product specified for every exterior opening. That’s layer one. Layer two applies to homes inside Ocean Reef Club, the private community that occupies most of North Key Largo’s northern end. The club’s own architectural review board must approve the window package before installation, and they enforce specific standards: no exposed fasteners, approved frame colors, and a documented submittal packet that includes product specifications and finish samples.
What this means in practice: you can’t order windows off a generic quote and hope they pass. The submittal packet has to be assembled correctly the first time, with the right NOA numbers referenced, the right frame finish specified, and the right fastener detail shown. We do this as a standard part of every North Key Largo job. We file the Monroe County permit package, and for Ocean Reef Club homes, we file the club’s architectural review package as well. The review typically adds two to four weeks to the calendar, depending on the club’s meeting schedule. We schedule around it so the tear-out doesn’t happen until approvals are in hand. You don’t sit with a half-finished opening waiting on a committee.
A few years ago, on a stilt home near Card Sound Road, our crew removed a corroded single-pane aluminum double-hung whose jamb had oxidized to white powder and replaced it with a fusion-welded frame impact-rated casement with low-E glass and argon fill, scheduling the tear-out only after Monroe County approved the HVHZ submittal packet we filed. That’s the sequence every North Key Largo job follows: paperwork first, tear-out second. It’s slower up front and faster in the end, because there’s no rework and no stop-work order.
Here are the three local failure modes we see when this sequence gets skipped or short-changed:
- Non-impact glazing installed to pass a visual inspection: the opening looks fine for a while, then fails an HVHZ permit audit, and the entire unit has to be torn out and replaced. The homeowner pays twice.
- Standard fasteners on Ocean Reef Club projects: the club’s board rejects the installation for exposed hardware, and the contractor has to pull trim, re-fasten, and resubmit. This adds weeks and cost.
- A corroded jamb left in place on an insert replacement: salt load from both bay and ocean sides accelerates new sash seal failure, and the homeowner gets a fogged unit within two or three years.
When you call us for Window Replacement in North Key Largo, we handle the dual-review sequence as part of the contract. You get a written copy of the permit submittal, the NOA references, and the club approval if your home is inside Ocean Reef. No guessing. No surprises after the fact.
We Also Serve Cities Near North Key Largo
Beyond North Key Largo, our crews cover Acacia Villas, Alafaya, Altamonte Springs, and Altoona. If you’re in one of those communities and dealing with salt-air corrosion or HVHZ code compliance on your windows, the same TruePane team and the same Keystone Standard apply. Call (954) 280-4413 and we’ll set up a time to measure.
Serving North Key Largo, FL - Our Local Coverage Area
We’re based in the North Key Largo area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Window Replacement in North Key Largo
Ocean Reef Club architectural review typically adds two to four weeks to the calendar, depending on when the board meets and whether the submittal packet is complete the first time. We file the club’s architectural review package as part of our standard Window Replacement process for any home inside the gate, and we don’t schedule tear-out until the club approval is in writing. Call (954) 280-4413 if you’re inside Ocean Reef and want a timeline specific to your home.
Sometimes, but we’ll inspect the frame before we quote an insert. Visible corrosion is the obvious disqualifier, but hairline oxidation where the sash meets the jamb can be just as destructive, because North Key Largo’s salt load works from both sides. If the frame metal is structurally sound and the channels are clean, an insert replacement saves real money. If there’s any question, we’ll tell you to go full frame, because an insert in a failing frame is a two-to-three-year window, not a twenty-year one.
HVHZ impact-rated glazing is engineered and tested to survive high-velocity wind-borne debris, meeting Miami-Dade NOA standards that Monroe County requires for every exterior opening. Standard insulated glass is not tested to that standard and will not pass the HVHZ permit check in North Key Largo. The difference is structural: impact-rated units use laminated glass and reinforced frames designed for a wind event, while standard units are built for insulation only. Installing the latter in North Key Largo means a permit rejection at minimum, and a tear-out when the opening gets audited.
Argon fill is about thermal performance, not salt resistance, and in North Key Largo it matters because your windows are running against 70 percent-plus humidity year-round. Argon between the panes reduces heat transfer and condensation, which keeps your HVAC from working harder than it has to and helps prevent interior fogging. In a salt-air climate, the frame material and finish matter equally if not more, which is why we specify marine-grade finishes and thermally broken frames as standard, not upgrades.
You may need a different design pressure rating, not necessarily a different style. The ocean side of North Key Largo carries a more direct wind exposure than the bay side, which often pushes design pressure requirements higher. The same style of window, whether casement, horizontal roller, or picture, can be specified to different DP ratings depending on the opening’s exposure. We’ll look at the location of each opening relative to the water and specify accordingly.
Get a Free Estimate for Window Replacement in North Key Largo
If you’re in North Key Largo and your windows are corroded, fogged, or non-compliant with HVHZ code, call us before you order anything. We’ll measure every opening, walk you through the dual-review requirements for your specific house, and give you a written, line-item price. The Done Right Promise applies to every job we do in North Key Largo: if it’s not done right, we make it right. No paperwork, no arguing. Call (954) 280-4413 to schedule your free estimate.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving North Key Largo since 2008 through a family craft tradition.
Six Reasons Homeowners Choose TruePane Windows & Doors
Impact systems engineered to design pressures up to +/-100, matched to your wind zone - your openings hold when the storm arrives.
Low-E insulated impact glass from our manufacturer lines commonly cuts monthly cooling bills 20-30%.
Laminated impact glass shuts out up to 40% of outside noise - traffic, neighbors, weather.
Monitoring services run $30-90 a month. Laminated impact glass resists forced entry around the clock, with no subscription.
Florida homeowners average around 25% savings on the windstorm portion of their policy after protecting every opening - some homes qualify for more.
A full impact package upgrades curb appeal, buyer confidence and appraised value in one project.



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