Free in-home measure and quote — PGT, CGI and CWS impact lines compared on your actual openings, style by style
Before
After
Before
After
Before
AfterFast, Reliable Window Replacement Across Key Biscayne
Window replacement in Key Biscayne means working inside a true barrier island environment, where salt air attacks frames from both Biscayne Bay and the Atlantic at once, and Miami-Dade’s High Velocity Hurricane Zone code demands the strictest product approvals in the country. A typical impact window replacement here runs $900 to $1,800 per opening installed, depending on size, frame material, and which floor the unit sits on. We know the island, the condos on Crandon Boulevard, the single-family streets off Harbor Drive, and the specific hardware and seal failures this climate causes. Call (844) 901-4551 and we’ll send a uniformed, background-checked technician to measure your openings and give you a written quote.
Why Winslow Windows & Doors Is Key Biscayne’s Preferred Window Replacement Company
Ed Winslow’s name is on the door, and on every job we do in Key Biscayne. We’re not a national chain that hands you a ticket number. Winslow Windows & Doors has been locally owned and owner-operated since 2011, with a published address and license number, so when you call about a window on Harbor Drive or a sliding door in a Crandon Boulevard condo, you’re talking to the people who will actually do the work.
Key Biscayne customers tell us the same thing: they want one company that answers the phone at any hour, sends someone who knows exactly how salt air affects hardware in a high-rise versus a ground-floor unit, and never surprises them on the invoice. Our reviews from Key Biscayne homeowners and condo owners consistently mention the same three things. The live person who answers 24/7. The written estimate that matched the final bill. And the fact that when a window issue came up months later, we showed up and made it right. That’s the Done Right Promise, and it applies to every opening we touch on the island.
Homeowners who’ve been burned before by vague estimates or no-show crews tend to call us after a recommendation from a neighbor. That’s the business we’ve built in Key Biscayne. A neighbor you can call at 2 a.m., and someone will actually answer.
Our Window Replacement Services in Key Biscayne
Every Window Replacement we do on the island starts with a site visit. The wind zone, the floor height, the opening’s exposure to salt spray from the bay, the ocean, or both, and the existing frame condition all drive what we recommend. Here’s what we install most often in Key Biscayne.
Full Frame Replacement
Most 1960s and 1970s condo towers on Key Biscayne still have original aluminum frames. Full frame replacement pulls the entire window, frame and all, and sets a new impact-rated unit into the opening with proper anchors and flashing. This is the work we do most in the older concrete condos along Crandon Boulevard and Ocean Lane Drive, where the original frames have corroded past the point of any repair.
Insert Window Replacement
When the existing frame is still structurally sound and square, an insert replacement drops a new impact-rated sash and glass into the old frame. It’s faster and less invasive, and we do a lot of these in post-Andrew homes across the island where the original impact systems are still fine but the seals and glass packages have aged. The insert approach keeps costs down without sacrificing any of the Miami-Dade NOA certification the code requires.
Vinyl Replacement Windows
Vinyl frames make sense on Key Biscayne for one big reason: they can’t corrode. Aluminum frames on this island take a beating from 360-degree salt air, but a quality vinyl impact window shrugs it off. We install vinyl replacement windows in many of the island’s newer single-family homes and lower-rise condo buildings, always with marine-grade stainless hardware and laminated impact glass carrying the Miami-Dade NOA.
Energy-Efficient Upgrade
Key Biscayne’s sun load is relentless, and the difference between old single-pane glass and a modern Low-E impact unit shows up on your FPL bill within the first month. We pair energy-efficient glass packages with the impact rating your building requires, so you get the cooling savings without compromising on code compliance. The federal 25C energy credit can also cover 30% of the product cost, up to $600 per year on qualifying units.
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’re an authorized installer for PGT, CGI, and ES Windows, and we stock the marine-grade stainless hardware these products need to survive on Key Biscayne. That means when your existing PGT or CGI window needs a replacement sash, roller, or lock, we can usually source it faster than a company that has to special-order from a mainland supplier. If you have written estimates from another company, we’ll give you a free second opinion. If we can fix what you have instead of replacing it, we’ll tell you that too, and it’ll usually run under the replacement cost.
Common Window Replacement Problems We See in Key Biscayne Homes
- Corroded original aluminum frames in older condos. The 1960s and 1970s mid-rise buildings along Crandon Boulevard and Harbor Drive still carry original non-impact aluminum windows and sliding doors. Most have corroded so heavily that the frames cannot be saved, and full frame replacement is the only code-compliant option.
- Seized rollers and pitted hardware from marine salt spray. Key Biscayne is ringed by salt water on all sides, and standard aluminum hardware that lasts ten years on the mainland seizes or pits within two to three years here. Every replacement quote on the island must default to marine-grade stainless rollers, locks, and hinges, or the customer is buying a callback a couple of years down the road.
- Failed glazing seals and fogged glass from sun and salt exposure. The combination of intense UV and constant salt air breaks down glazing seals and weatherstripping faster than anywhere else in Miami-Dade that isn’t also a barrier island. Fogged units are common, and the fix is a new insulated impact unit with a fresh NOA.
- Ground-floor openings missing proper sill pans. Much of Key Biscayne sits in flood zones, and ground-floor window and door openings have specific threshold and sill pan requirements under Miami-Dade code. Older installations frequently omitted them. When we replace those units, the sill pan goes in as part of the job, not as a change order.
What Window Replacement Costs in Key Biscayne
Impact windows generally run $800 to $1,500 per window installed in Key Biscayne. A standard impact single-hung falls between $900 and $1,800 per opening. Large or custom openings, like a big picture window facing the bay or an oversized slider on a high floor, typically run $2,500 to $5,000. Whole-home packages span $8,000 to $25,000 or more, depending on how many openings and whether we’re doing full frame or insert work.
What moves the price on Key Biscayne more than anywhere else is the opening’s wind-load requirement and its salt exposure. A 10th-floor window facing the Atlantic needs a higher design pressure rating than a first-floor window facing a courtyard, and that costs more. The same goes for the hardware package. Marine-grade stainless rollers and hinges are more expensive than standard aluminum, but on this island, standard aluminum isn’t an option if you want the job to hold up.
The quickest way to get a real number is a free in-home measure and a written, line-item quote. Call (844) 901-4551 and we’ll schedule it. The quote we give you is the price you pay, no change orders, no surprises.
Pricing for Window Replacement in Key Biscayne, FL
Here’s a plain-language breakdown of what we see on the island. A typical insert replacement with impact glass in a mid-rise condo runs $900 to $1,300 per unit. Full frame replacement in one of the older concrete towers generally starts around $1,200 and can reach $1,800 per opening once you account for the upgraded anchors and flashing the wind zone requires. Custom or oversized openings, especially ocean-facing high floors, run $2,500 to $5,000. And if you’re doing the whole condo or house at once, the numbers usually land between $8,000 and $25,000.
Every quote includes the marine-grade stainless hardware this island demands, the Miami-Dade NOA on the glass and frame, and the sill pan work where flood-zone code applies. A mainland quote that leaves those out isn’t cheaper. It’s incomplete, and it won’t pass the third-party inspection Key Biscayne requires. We offer a free in-home measure and a free second opinion on any written estimate. You can take $40 off any repair over $200, and seniors and veterans get a permanent 10% discount, every day, no expiration.
Florida Pays You Back
Between state and federal programs, a lot of Key Biscayne homeowners recover a meaningful chunk of their window replacement cost. My Safe Florida Home offers matching grants up to $10,000 for qualifying wind-mitigation upgrades, and impact windows are among the eligible improvements. Florida also exempts impact-resistant windows and doors from sales tax, which saves you money right at purchase. On the federal side, the 25C energy credit covers 30% of the product cost on qualifying units, up to $600 per year.
Then there’s the insurance angle. After a wind-mitigation inspection, which typically runs $75 to $150, many Key Biscayne homeowners see their windstorm premium drop by roughly 25% on the windstorm portion of the policy. Every carrier sets its own numbers, so we can’t guarantee a specific dollar amount, but the documented Miami-Dade NOA compliance on your replacement windows is exactly the paperwork the inspection looks for. We’re not insurance brokers, but we’ve been through enough of these inspections to know what the inspector wants to see, and we make sure your paperwork is in order.
We Also Serve Cities Near Key Biscayne
While this page is built specifically for Window Replacement in Key Biscayne, our crews also cover Coconut Grove, Coral Gables, Miami Beach, and Miami. Same live 24/7 phone, same marine-hardware standards, same Done Right Promise. The one down the road.
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
No, the standard itself is the same across Miami-Dade County, which is the High Velocity Hurricane Zone. Key Biscayne shares the same Miami-Dade NOA requirement as mainland Miami. What’s different is that on Key Biscayne you’re also dealing with 360-degree salt spray, so the hardware package needs to be marine-grade stainless in a way most mainland quotes won’t include by default. A compliant quote here includes both the NOA and the stainless hardware. If you’d like us to review a quote you’ve received, call (844) 901-4551 and we’ll give you a free second opinion.
Because they were almost certainly standard aluminum, not marine-grade stainless. Key Biscayne is one of the only places in Miami-Dade where the surrounding salt water saturates the air from every direction, and standard aluminum rollers seize or pit within 24 to 36 months. We replace them with marine-grade stainless as a baseline on every job here, not as an upgrade. Call (844) 901-4551 if you’re tired of replacing the same rollers, and we’ll tell you exactly what’s failing and what it costs to fix it for good.
Replacement windows in a Key Biscayne high-rise must carry a Miami-Dade Notice of Acceptance, and the required design pressure rating goes up with floor height and exposure. Ocean-facing upper-floor units in zip code 33149 need higher design pressures than ground-floor units facing an interior courtyard. We match the design pressure to each specific opening, because installing an under-rated unit in a high-rise will fail the third-party inspection and stall the permit close-out. If you want an exact rating for your openings, call (844) 901-4551 and we’ll measure it properly.
Getting a wind-mitigation inspection after your impact replacement is complete is the step that can drop your windstorm premium, often by around 25% on the windstorm portion, though your carrier sets the final number. The inspection, typically $75 to $150, verifies that your installed windows carry the Miami-Dade NOA and meet the design pressure for each opening. We make sure your documentation is complete and the labels are where the inspector needs them. Call (844) 901-4551 to talk through what a compliant install includes.
Flood-zone code. Much of the island sits in flood zones where ground-floor and first-elevated-floor openings must have proper sill pans and thresholds to keep water out during storm surge. Mainland homes outside the flood zone don’t carry that requirement. On Key Biscayne, we include the sill pan work in the quote as standard, not as a change order, because the code demands it and the inspection will fail without it. If your ground-floor condo needs windows, call (844) 901-4551 for a free in-home measure.
Contact Winslow Windows & Doors in Key Biscayne
If you live in Key Biscayne and need window replacement, start with a free in-home measure and a written quote. We’ll send a uniformed, background-checked technician who knows the island’s wind zone, salt-exposure profile, and flood-zone sill requirements. Ed Winslow’s name is on the door, and on every job we do. The ask is simple: call (844) 901-4551 to schedule your free estimate. We’ll give you a price, a timeline, and a straight answer about what your building actually needs.
Written by Ed Winslow, Owner at Winslow Windows & Doors, serving Key Biscayne and the surrounding communities since 2011.