Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
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AfterFast, Reliable Window Replacement Across Key Biscayne
Window replacement in Key Biscayne means something different than it does across the causeway. You’re on a barrier island with the Atlantic on one side, Biscayne Bay on the other, and Miami-Dade County’s High Velocity Hurricane Zone code governing every opening in your walls. A typical impact-rated replacement window here runs $800 to $1,500 per opening installed, and full-frame replacements in older condos along Crandon Boulevard usually land between $1,200 and $2,400 depending on size and floor height. We’re Winslow Windows & Doors, Ed Winslow’s company, and we’ve been installing marine-grade, Miami-Dade NOA-approved windows on this island long enough to know exactly which frame finishes and hardware survive here. Call (904) 478-8983 for a free in-home measure and a written quote with real numbers.
Why Winslow Windows & Doors Is Key Biscayne’s Preferred Window Replacement Company
Ed Winslow put his name on this business in 2011, and that changes how every job gets handled. There’s no call center, no ticket number, no “we’ll have someone in your area in a few weeks.” A live person answers our phone 24 hours a day, seven days a week, and that person knows windows. When a Key Biscayne condo owner calls about a corroded jalousie frame or a sagging impact sash, we know the building, we know the wind zone, and we know which NOA paperwork their insurer is going to demand.
Our technicians arrive background-checked and in uniform, so you know who’s at your door before you open it. We publish our address and license number. We don’t hide behind subcontractors or shell companies. And when we give you a price, it’s the price: upfront, line-item, no change orders appearing later. Homeowners who’ve been burned by vague estimates and no-show crews tend to notice that.
We also back every installation with our Done Right Promise. If it’s not done right, we make it right. That’s a standard of accountability written into every job.
Our Window Replacement Services in Key Biscayne
Most Key Biscayne projects fall into one of four categories. Here’s how each one actually plays out on this island, with the salt air and HVHZ requirements shaping every recommendation.
Full Frame Replacement
This is the most common project we do on Key Biscayne, especially in 1960s-1980s condos along Crandon Boulevard and the waterfront. The original aluminum frames have spent decades in salt spray, and by the time we pull them, the jamb screws often disintegrate on removal. Full frame replacement lets us inspect the rough opening, repair any corroded or water-damaged framing, and install a complete PGT or CGI impact-rated unit that carries a Miami-Dade NOA. You’re not putting a new window into an old, compromised frame. You’re starting clean.
Insert Window Replacement
When the existing frame is still structurally sound and the opening is square, an insert replacement can save real money. This works on Key Biscayne in newer buildings or where a previous owner already upgraded the frame but the glass or hardware failed. We measure the existing frame precisely and order an impact-rated insert built for that opening. One caution: if the frame shows any pitting, white corrosion blooms, or design-pressure test failures, an insert won’t fix the underlying problem and we’ll tell you that directly.
Vinyl Replacement Windows
Vinyl makes sense on Key Biscayne for specific situations, mainly inland single-family homes where the budget is tighter and the exposure to direct salt spray is less severe than the beachfront or bayfront line. Modern vinyl frames don’t corrode the way aluminum does, and we pair them with laminated impact glass. But vinyl isn’t right for every opening: in high-rise floor positions or openings with large design pressure requirements, aluminum or aluminum-clad frames with marine-grade finishes are the better call. We’ll show you the numbers for both and let you decide.
Energy-Efficient Upgrade
Switching from a 1970s single-pane or jalousie window to a Low-E, argon-filled impact unit cuts heat gain dramatically, and on Key Biscayne that’s a year-round cooling cost story, not a seasonal one. The island’s sun load is relentless, and the salt haze films over old glass quickly. We install Energy Star-rated PGT and ES Windows units with Low-E coatings that block the solar heat without darkening the view. Most homeowners see the difference on their first FPL bill after installation. Pair that with the federal 25C energy credit, and the upgrade math looks better than most people expect.
Beyond installations, we handle Window Replacement maintenance and care specific to coastal environments: hardware lubrication with marine-grade products, weep cover replacement, seal inspection, and post-storm assessments. If your windows are more than five years old on this island, an annual hardware check catches corrosion before it becomes a sagging sash.
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 install and service windows from PGT, CGI, CWS, ES Windows, ECO Window Systems, Mr-Glass, Therma-Tru. On Key Biscayne, we lean heavily on PGT and CGI for impact-rated products because their laminated glass and stainless hardware hold up in this salt environment better than most. We also keep local parts inventory for common Key Biscayne failures: stainless hinge sets, marine-grade weep covers, and replacement locks for the window brands most common in island condos. That means less waiting when a window fails, because we’re not ordering from a warehouse in Orlando every time.
Common Window Replacement Problems We See in Key Biscayne Homes
- Aluminum frame pitting and white corrosion blooms. Salt spray off the Atlantic and Biscayne Bay attacks mill-finish aluminum within five to eight years. Frames pit, paint fails, and design pressure tests start coming back low, which is exactly when insurers start asking questions.
- Jalousie windows that insurers won’t touch. The 1960s-1980s condo stock has a lot of louvered units left, and after Hurricane Irma’s direct hit on the island in 2017, carriers ramped up non-renewal notices. These windows can’t stop large-missile impact and they leak driven rain into the jamb.
- Zinc-plated hardware that rusts and snaps. Hinges, locks, and weep covers made for inland use simply don’t last on Key Biscayne. We see sashes jammed shut or sagging because a zinc-plated hinge corroded through. This is a weekly repair for us on the island and almost never an issue on the mainland.
- Insurer non-renewal letters tied to window compliance. The most common reason Key Biscayne homeowners call us isn’t a broken window. It’s a letter from their carrier saying the windows don’t meet Miami-Dade HVHZ code and the policy won’t renew until they’re replaced with NOA-approved impact units.
Pricing for Window Replacement in Key Biscayne, FL
You can’t price Key Biscayne windows from a mainland chart. The salt environment and the HVHZ wind zone push material costs up, because the right window here has a laminated interlayer, marine-grade hardware, and a frame finish that won’t pit in five years. That’s the coastal-spec version. The inland-spec version, the one the big-box salesperson quotes you, might save $200 per opening up front and cost you $1,000 per opening within a decade when the frame corrodes and the insurer demands replacement again. We’ve seen it happen too many times to recommend it. On the island, the cheap spec is the expensive one.
What Window Replacement Costs in Key Biscayne
Here’s what we’re actually quoting on Key Biscayne right now. Impact-rated windows generally run $800 to $1,500 per window installed. Impact single-hung windows land between $900 and $1,800. Large or custom openings, which are common in the waterfront condo buildings and the bigger single-family homes off Crandon, run $2,500 to $5,000 per opening. Whole-home packages on the island, depending on opening count and floor height, start around $8,000 and go up from there. The things that move the number are the number of openings, the wind zone design pressure required for your building’s height and exposure, the frame material, and the condition of the rough opening once we get the old window out.
Every estimate from us is a free in-home measure with a written line-item quote. No vague numbers, no “we’ll figure it out later.” Call (904) 478-8983 and we’ll come out, measure, and give you real numbers you can take to your condo board or insurance agent.
Florida Pays You Back
The incentives for installing the right windows in Key Biscayne add up, and we’ll help you sort through every one of them. The My Safe Florida Home program offers matching grants up to $10,000 for qualifying wind-mitigation upgrades, and impact windows are a core part of that. You can also claim a Florida sales-tax exemption on impact-resistant windows and doors, and the federal 25C energy credit covers 30% of the product cost on qualifying energy-efficient units, up to $600 per year. After a wind-mitigation inspection, which typically runs $75 to $150 in this market, most property owners see windstorm-premium credits averaging around 25% on the windstorm portion of their policy. We can’t guarantee what your carrier will pay, but we can hand you the paperwork: Miami-Dade NOA numbers, installation records, and everything your insurer needs to verify compliance.
One comparison worth making early: impact windows versus hurricane shutters. Shutters cost less to buy, but you’re hanging panels every storm, you’re ratcheting bolts in the dark, and if you’re not home when the storm comes, nobody’s protecting the opening. Impact windows are permanent protection. No panels. No prep. The glass does the job every hour of every day, storm or no storm. On Key Biscayne, where a hurricane can spin up quickly and evacuation orders come with little warning, permanent protection is the practical choice for most homeowners.
We Also Serve Cities Near Key Biscayne
While this page covers Window Replacement in Key Biscayne specifically, our crews also work across the causeway in Miami Beach, Miami, and Coral Gables. The water changes everything about the spec, so if you’re a few miles inland, the requirements and the pricing differ. We’ll tell you exactly what applies to your address.
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 Replacement in Key Biscayne
Because the entire island sits inside the High Velocity Hurricane Zone, and that designation carries stricter requirements than standard Florida Building Code. Key Biscayne is a true barrier island with the Atlantic to the east and Biscayne Bay to the west, and no upstream landmass to slow a storm before it hits. Every replacement window here must carry a Miami-Dade Product Control Notice of Acceptance, not just Florida Product Approval. The NOA verifies large-missile impact testing, cyclic wind pressure, and water resistance in a way the standard approval does not. If your window doesn’t have a NOA, your insurer has every right to refuse coverage. Call (904) 478-8983 and we’ll walk you through what your building needs.
It depends on the condition of the frame, but on Key Biscayne, most corroded aluminum frames are too far gone for a glass-only retrofit. If the frame is pitted, showing white corrosion blooms, or failing design pressure, a glass replacement leaves you with the same structural problem and the same insurer problem. Full frame replacement is the better long-term solution in those cases. If the frame is still sound, we’ll tell you that too and quote a glass or insert replacement honestly.
Expect the coastal-spec version to run 15% to 25% more per opening than the same size window built to inland standards. That gap covers marine-grade finishes, stainless steel hardware, laminated impact glass, and the Miami-Dade NOA testing and paperwork. The inland-spec version saves money on day one and usually fails within a decade in this salt environment. We quote the coastal spec because the cheaper option costs you more in the long run, and we’re not going to sell you a window we know won’t last.
In most cases, yes. Jalousie windows left from the 1960s through 1980s condo stock are non-compliant with current HVHZ code and many carriers stopped writing policies with these windows after Hurricane Irma. Their thin glass and unsealed louvers cannot stop large-missile impact, and they leak driven rain into the jamb. If your insurer hasn’t sent the letter yet, they likely will. Replacing them with NOA-approved impact units is the only way to get coverage back on stable terms.
Most Key Biscayne homeowners we work with report a 15% to 25% drop in cooling costs after switching from single-pane or jalousie windows to Low-E, argon-filled impact units. The island’s sun load is year-round, and old single-pane glass transfers heat all day. The Low-E coating blocks solar heat gain while preserving natural light, and the argon fill adds insulation. Combined with the federal 25C energy credit and the windstorm premium reduction, the total financial picture usually justifies the upgrade within a few years. Call (904) 478-8983 for an exact quote, and we’ll show you the math on your specific openings.
Written by Ed Winslow, Owner at Winslow Windows & Doors, serving Key Biscayne 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.