Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Window Installation Across Key Biscayne
Window installation in Key Biscayne is not the same job it is on the mainland. Every opening on the island sits inside Miami-Dade’s High-Velocity Hurricane Zone, surrounded by saltwater on all sides. That means the units going into your home or condo have to clear a bar most of Florida never sees: a Miami-Dade Notice of Acceptance matched to your exact window size and configuration, plus hardware built to survive constant salt spray. Ed Winslow and our crew handle both every day. If you need a straight answer on what replacement windows will cost on Key Biscayne, call (863) 656-0462 and we’ll walk you through it, line by line.
Why Winslow Windows & Doors Is Key Biscayne’s Preferred Window Installation Company
Ed Winslow founded this company in 2011 and put his own name on the door. That was deliberate. When a Key Biscayne homeowner calls us about a corroded jamb or a failed hurricane window, the person who answers knows the island’s buildings, its condo boards, and its inspection process without being told. We are not a call center routing tickets across three counties. We are the Window Installation team that shows up in marked trucks, uniformed, background-checked, and ready to explain exactly what we found once the old sash comes out.
Because we serve Key Biscayne specifically, our crews are familiar with the concrete mid-rises along Crandon Boulevard, the bayfront condos, and the older single-family streets south of the Village. We know which buildings have strict elevation rules and which HOAs demand a specific bronze tint on every glass pane. That local knowledge prevents a very expensive mistake: ordering hundreds of dollars of glass that passes code but gets rejected by the board after install.
Every job carries the 36500-Day Done Right Promise. If it’s not done right, we make it right. That’s a century-long standard, and we put it on paper because Ed’s name is on the job, not just the truck.
Our Window Installation Services in Key Biscayne
Here are the window types we install most often on the island, and why they fit Key Biscayne’s conditions.
Single & Double Hung Windows
These are the vertical-sash windows common in older Key Biscayne single-family homes and low-rise condos. The original aluminum versions were single-pane and nowhere near current HVHZ impact standards. We replace them with modern units that keep the traditional look your condo board wants while adding laminated impact glass and marine-grade stainless hardware. Salt spray is relentless here; ordinary hardware seizes within a decade.

Horizontal Roller Windows
Horizontal rollers are everywhere along Crandon Boulevard’s mid-rise and high-rise condos because they suit wide bay-facing openings. On Key Biscayne, the tracks on original units clog with salt residue and sand, and the rollers corrode until the sash won’t budge. We install new aluminum or vinyl horizontal rollers with stainless roller assemblies and weep systems designed for continuous salt exposure. These units also need a Miami-Dade NOA specific to each panel size, which we pull before ordering.

3-Panel Sliding (3-Lite Roller) Windows
The three-panel slider is a signature of Key Biscayne condo living, spanning entire living-room walls toward Biscayne Bay. Replacing one is less like a window swap and more like a structural project: glass weight, wind load, and frame anchoring all move up. Our crew has done these on mid-rises where the association requires all three lites to match existing tint and frame color exactly. We handle the permit, the NOA paperwork, and the board approval so the opening is protected before hurricane season, not after.

Casement Windows
Casements crank outward and seal tight under high wind pressure, which is why they perform so well in Key Biscayne’s wind zone. The downside on a barrier island: the crank mechanisms and hinges are exposed to salt air and fail faster than on the mainland. We specify stainless hardware and corrosion-resistant operators on every casement we install here. Key Biscayne inspectors will check the NOA against the exact crank-out configuration, so we get that documentation squared away first.

What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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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 Key Biscayne
We are authorized installers for ES Windows, ECO Window Systems, and Mr-Glass, among a wider lineup. Why that matters on Key Biscayne: a big-box store can sell you a name-brand window, but they cannot pull the Miami-Dade NOA for your exact opening, and they won’t know your condo board’s tint requirement. We stock the replacement hardware and parts for these brands locally, and because we know what’s on the island’s buildings, we can diagnose issues faster than a crew crossing the Rickenbacker Causeway for the first time.
Common Window Installation Problems We See in Key Biscayne Homes
- Salt-corroded frames that hide structural damage. The steel reinforcements inside older aluminum frames rust to dust where salt spray penetrates. On a mid-rise off Crandon Boulevard, our crew pulled the original 1970s single-pane aluminum windows and found exactly that: the steel inside the jambs had crumbled. We replaced the full openings with PGT casement and horizontal roller units carrying Miami-Dade NOA, using marine-grade stainless hardware and low-E insulated glass, and coordinated both the Miami-Dade permit and the condo board’s required tint level before the first sash was set.
- Single-pane originals from the 1960s through 1980s that fail today’s code. Many of Key Biscayne’s concrete condo towers still carry the windows they were built with. They leak, they fog, they won’t stop wind-driven rain, and they will not pass a wind-mitigation inspection. Replacing them is not a cosmetic upgrade; it is a code-compliance and insurance necessity.
- Condo boards that reject the wrong frame color or tint. On Key Biscayne, you cannot replace one window with whatever you like. Most associations specify exact frame colors and glass tints to keep the building’s street-facing appearance uniform. Order the wrong finish and the board will make you tear it out. We submit the association’s spec before we order anything.
- HVHZ units installed without the right NOA. A Key Biscayne inspector will reject a permit on site if the installer’s Miami-Dade NOA does not match the exact size and configuration of the window sitting in the opening. Some crews learn this the hard way. We don’t.
Pricing for Window Installation in Key Biscayne, FL
A typical impact window replacement on Key Biscayne runs $900 to $1,800 per window installed, depending on size, frame material, and floor height. Large openings like three-panel sliders can push into the $2,500 to $5,000 range per unit. Whole-home or whole-condo packages generally land between $8,000 and $25,000 and up, driven by opening count and the building’s specific wind-load requirements. Key Biscayne’s salt environment means we recommend marine-grade hardware on every installation, which adds a modest materials cost compared to mainland jobs but prevents a premature replacement cycle. Call (863) 656-0462 for a free in-home measure and a written, line-item quote. No vague allowances, no change orders you didn’t approve in writing first.
What Window Installation Costs in Key Biscayne
Here is a cleaner breakdown of what moves the number. Impact windows generally run $800 to $1,500 per window installed. A standard impact single-hung is $900 to $1,800. Large or custom openings, including bay conversions and oversized sliders on beach-facing condos, run $2,500 to $5,000 or more. Whole-home packages typically land between $8,000 and $25,000, sometimes higher on high-rise floors where hoisting and anchoring costs climb.
Three factors drive price on Key Biscayne more than anywhere nearby. First, wind zone: the island sits inside the Miami-Dade HVHZ, so every unit must meet a higher design pressure and carry the matching NOA. Second, floor height: upper-floor condo units require crane or swing-stage access, and the higher the floor, the higher the labor. Third, frame material: aluminum handles salt better than wood but costs more than vinyl, and marine-grade stainless hardware adds to every opening. We give you a fixed written quote after a free in-home measure, so the number you approve is the number you pay.
Florida Pays You Back
Key Biscayne homeowners who replace aging windows can stack several incentives at once. The My Safe Florida Home program offers matching grants up to $10,000 for qualifying wind-mitigation upgrades, including impact windows. Florida also exempts impact-resistant windows and doors from sales tax. On the federal side, the 25C energy credit returns 30% of the product cost, up to $600 per year, on qualifying energy-efficient units. After a wind-mitigation inspection, which typically costs $75 to $150, many Key Biscayne homeowners also see a reduction on the windstorm portion of their insurance premium, often averaging around 25 percent. Program rules and carrier rates are set by others, so we won’t promise a specific refund. We will, however, make sure your install documents meet what the inspectors and insurers need to see.
We Also Serve Cities Near Key Biscayne
Winslow Windows & Doors works throughout South Florida, including Miami Beach, Miami, Coral Gables, and North Miami Beach. If you live just over the causeway and need the same marine-grade, HVHZ-compliant window work, call (863) 656-0462 and tell us where you are. The same crew, the same standards, the same written quote.
Serving Key Biscayne, FL - Our Local Coverage Area
We’re based in the Key Biscayne 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 Installation in Key Biscayne
Every replacement window on Key Biscayne needs a Miami-Dade Notice of Acceptance specific to the exact size and configuration being installed. Florida Product Approval is not sufficient inside the High-Velocity Hurricane Zone. The inspector will check the NOA on site, not just during plan review. If it doesn’t match the opening, the permit fails. Call (863) 656-0462 and we’ll pull the correct NOA before anything gets ordered.
Because most associations have an additional rule beyond building code: uniform appearance. They specify the exact frame color and glass tint so every elevation of the building matches. A window can carry a valid NOA and still be rejected by the board if the finish doesn’t match the association’s spec. We submit the board’s required frame color and tint before ordering, so the product arriving on the truck is the product the board already approved. That approval is a separate track from the Miami-Dade permit, and missing it causes weeks of delay and a tear-out.
On the island’s older buildings, the most common surprise is corroded steel reinforcement inside aluminum frames, plus failed waterproofing behind the jamb. Salt spray gets into the wall cavity and eats at anything not marine-grade. We handle this by inspecting first, writing realistic allowances into the contract, and pricing any surprise in writing before we touch it. You won’t get a change order you didn’t approve.
Most Key Biscayne associations require entire elevations or building phases to be replaced together, not individual openings. The uniform-appearance rule is the reason. One new window with fresh glass and a slightly different tint breaks the building’s street-facing look, so boards typically won’t allow it. Check your association’s documents first, then call (863) 656-0462 and we can work within whatever phase or elevation rules your board has on file.
Yes, and the salt air is exactly why it helps. Old single-pane aluminum windows conduct heat and leak conditioned air. Low-E coatings block solar gain while still letting light through, which matters on an island where the sun reflects off the ocean and the bay all day. The salt doesn’t reduce the energy savings; it does require that the frame hardware and window tracks be marine-grade so the thermal performance doesn’t get undermined by corroded, leaking openings within a decade. For a specific estimate on your unit, call (863) 656-0462 - estimates are free.
A Note on Openings, Permits, and What We Actually Do
Opening up an older Key Biscayne home or condo unit tends to turn up more than you planned for: outdated wiring near the window wall, undersized or damaged framing, failed waterproofing that nobody could see until the jamb came out. This is the single biggest reason a replacement window quote moves between the estimate and the install. We handle it deliberately. First, we inspect before we quote, including the condition of the rough opening where accessible. Second, we write realistic allowances into the contract for framing, flashing, and any rot or corrosion remediation. Third, if something genuinely unplanned appears, we stop, show you what we found, and get your written approval on a fixed price before we proceed. That is how a tradesperson should work. We don’t surprise invoice after the fact. Ed’s name is on the door and on every job we do.
Written by Ed Winslow, Owner at Winslow Windows & Doors, serving Key Biscayne and South Florida since 2011.
Six Reasons Homeowners Choose Winslow 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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