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 Big Coppitt Key
Window installation in Big Coppitt Key costs between $850 and $2,400 per opening for impact-rated units, with most whole-home replacement projects on elevated Keys homes landing between $14,000 and $38,000 depending on framing condition and window count. The price is driven by Monroe County’s mandatory Florida Product Approval requirements, which make every opening a code-regulated decision rather than a simple swap. We’ve worked enough homes along Avenue B, Maloney Avenue, and the canals off Boca Chica Road to know what’s behind those original jalousies before the first screw comes out. Call (813) 320-9346 for a free estimate that accounts for the framing reality, not just the glass size.
What makes Big Coppitt Key different from the mainland is simple: you live on a narrow strip of land nine miles from Key West, with the Atlantic on one side and Florida Bay on the other. Every window you install must be impact-rated and carry a Florida Product Approval for 150+ mph wind design speeds. That’s not a manufacturer’s suggestion. That’s the law in Monroe County, and we pull permits and clear approvals before we touch the old unit. Our Window Installation team knows the county’s current interpretation of that code, which trips up plenty of homeowners every year.
Why TruePane Windows & Doors Is Big Coppitt Key’s Preferred Window Installation Company
We’ve been called out to Big Coppitt Key for over four decades of combined experience among our senior crew, and the work here follows a pattern. Homes built in the 1960s through the 1980s on concrete pilings still carry original single-pane aluminum jalousie or sliding windows. Those units were never flashed properly at the rough opening, and four decades of wind-driven salt spray have done exactly what salt spray does to untreated wood and cheap aluminum. When we open the wall, we know what we’re likely to find, and we quote accordingly. That’s the kind of local knowledge you don’t get from a franchise playbook or an online bid generator.
Our customers on Big Coppitt Key call (813) 320-9346 and get a live person. Not a voicemail tree. Not a callback form. Dale Kessler founded TruePane in 2008 on a simple rule that still governs every install: if the pane is not true, the job is not done. We hire local, train apprentices into journeymen, and we show up in uniform, background-checked, and ready to measure every opening twice. We’ll be there when we say.
We’re backed by the 90-Day Done Right Promise and The Keystone Standard: both manufacturer warranty layers registered in writing, durations stated, before our truck leaves your driveway. If something’s not right, we make it right. No paperwork fights, no arguing. That’s the standard.
Our Window Installation Services in Big Coppitt Key
Here’s what we install most often on Big Coppitt Key, and what each job actually involves when the wall comes open.
Casement Windows
Casement windows seal tighter than any other operable style, which matters on Big Coppitt Key where wind-driven rain attacks from every compass point. We set them with full-perimeter flashing tape and fusion-welded corners. On the older wood-frame elevated homes along West Circle Drive, we routinely reframe the rough opening to square before the casement goes in, because forty-year-old jamb rot doesn’t care how good the new window is.

Awning Windows
Awning windows work well in the Keys because they shed rain even when open, letting you ventilate through a storm band without soaking the interior. We install them in kitchens, baths, and low openings where crank-out casements would be awkward. Hardware gets the anodized treatment rated for continuous salt exposure. Standard marine-grade aluminum without proper anodizing fails within five to seven years here. We don’t install the kind that fails.

Fixed and Picture Windows
Impact-rated picture windows on a Big Coppitt Key canal home aren’t a luxury. They’re the difference between keeping the view and losing it. We carry Simonton, PGT, and CGI impact-rated fixed units with laminated glass that meets Monroe County’s 150+ mph design wind requirement. A typical fixed picture window replacement on Big Coppitt Key runs $900 to $2,100 per opening, depending on size and whether the existing rough opening is square enough to reuse. Most aren’t.

Single and Double Hung Windows
Single and double hung windows are the most common replacement style on Big Coppitt Key, especially in the modest CBS homes off Maloney Avenue. We install thermal-break frames with sashes you can actually lift after five years in the salt. A like-for-like replacement of the old jalousies is legally impossible under current Monroe County code, so we walk every customer through the upgrade path before the estimate.

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 Big Coppitt Key
We’re an authorized installer for more than a dozen manufacturer lines, and for Big Coppitt Key work we lean on the brands proven to survive Keys salt and wind. Simonton, PGT, and CGI are our most common recommendations for impact-rated work, and we also install Ply Gem where the budget calls for a solid mid-range option. We’ll put competitor quotes side by side on paper so you see exactly what you’re buying. Parts and hardware we keep stocked locally means faster turnaround on warranty work and tune-ups, without waiting two weeks for a truck from the mainland.
Common Window Installation Problems We See in Big Coppitt Key Homes
After years in this trade and hundreds of opened walls on this island, here’s what we know about Big Coppitt Key’s housing stock:
- Remodel permit stalls over jalousie approval. Homeowners start a kitchen or bath remodel, the building department discovers the original jalousie windows lack current site-specific impact approval, and suddenly the permit won’t move until the windows are replaced. We see this constantly. We pull the approval and the window permit in the same application so it doesn’t hold your job hostage.
- Salt-air oxidation seizes sash hardware. Nominally “marine-grade” aluminum frames without proper anodizing seize up within five to seven years on Big Coppitt Key. The window won’t open, won’t close, and becomes a life-safety issue. Frame replacement is often cheaper than repeated hardware salvage.
- Hidden jamb rot from failed flashing. Original jalousie pockets were often never flashed at all, just bare studs against stucco. Wind-driven rain wicks into framing, rots the jamb hidden behind stucco, and you don’t see it until the old window comes out. When we find it, we show you before we rebuild it.
- Accordion shutters don’t save the jalousies. Contractors see this all the time: homeowners installed accordion shutters years ago, assuming that excused keeping the old single-pane jalousies. Under current Monroe County interpretation, the window unit itself must be impact-rated, or the shutter system needs a current site-specific approval on file. Few shutter systems have that approval. Most result in a full window replacement mid-project.
Pricing for Window Installation in Big Coppitt Key, FL
A typical impact-rated casement or double hung window installation on Big Coppitt Key runs $850 to $2,400 per opening. Impact-rated picture windows run $900 to $2,100. Framing repair, when jamb rot or out-of-square rough openings are discovered, adds $150 to $600 per opening depending on the extent. Whole-home replacements on elevated Keys homes typically land between $14,000 and $38,000, with the spread driven by window count, style, and how much of the original rough framing is worth saving. Every estimate we write is a fixed, written line-item quote. If something changes once the wall is open, you approve the number in writing before we touch it. Call (813) 320-9346 and we’ll come measure every opening, twice, and put the numbers on paper.
We also honor a permanent 5% discount for seniors and veterans on Big Coppitt Key, a $50 credit on any repair over $250, and a maintenance check for hardware that’s getting stiff from salt. No other promotions, and we won’t invent one to close a sale.
We Also Serve Cities Near Big Coppitt Key
TruePane Windows & Doors crews serve Big Coppitt Key and the surrounding Lower Keys communities, including Acacia Villas, Alafaya, Altamonte Springs, and Altoona. If you’re outside the immediate island, call (813) 320-9346 and we’ll confirm schedule availability. Our Window Installation in Big Coppitt Key team works the whole service corridor. Dispatch and scheduling are coordinated from our South Florida office, and crews work locally on Big Coppitt Key.
Serving Big Coppitt Key, FL - Our Local Coverage Area
We’re based in the Big Coppitt Key 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 Big Coppitt Key
Yes, Monroe County allows a single window replacement, provided the new unit carries a Florida Product Approval for 150+ mph wind design speeds. You are not required to replace all jalousies at once. However, keep in mind that any future remodel permit touching those walls will likely trigger the same requirement for the remaining jalousies, because current code does not recognize the old single-pane units as compliant. Many Big Coppitt Key homeowners phase the work over two or three seasons for budget reasons, and we can write the permit that way. Call (813) 320-9346 if you want to talk through a phased plan.
In most cases, no. Monroe County’s current interpretation requires either the window unit itself to be impact-rated, or the shutter system to carry a current, site-specific approval on file with the building department. Most older accordion shutter installations lack that site-specific approval, and the county will not grandfather them. When we pull your remodel permit, the building department will likely require the window units themselves to meet impact standards. We clear all Florida Product Approvals with the county before we pull the old unit, so the permit inspection passes the first time. Call (813) 320-9346 for a free estimate that includes the approval paperwork.
We inspect first, quote allowances into the contract, and only proceed on surprise framing work after you see the numbers and approve them in writing. On Avenue B, we opened the wall around a 1970s wood-frame elevated home and found the original jalousie pockets were never flashed, just bare studs against the stucco, with half the jambs soft from years of wind-driven salt spray. Our crew reframed the rough opening to square, sistered the rotted jamb, laid flashing tape full-perimeter, and set a fusion-welded double hung with impact-rated glazing. The permit inspection passed first time because we had already cleared the Florida Product Approval with the county. That’s how we work every opening.
Thermal-break aluminum with factory anodized finish or vinyl with full fusion-welded corners holds up best on Big Coppitt Key. Raw aluminum, even products labeled “marine-grade” without proper anodizing, oxidizes within five to seven years and the hardware seizes. We specify anodized frames and stainless or coated hardware for every opening, because the island’s lack of any landmass buffer on either side means salt spray attacks from all compass points. If you’ve had hardware seize before, call (813) 320-9346 and we’ll walk you through what actually works here.
Yes, in most cases replacing original jalousies or single-pane sliders with impact-rated windows carrying current Florida Product Approval will qualify you for windstorm premium reductions with your insurer. The exact reduction depends on your carrier and policy. We register both manufacturer warranty layers in writing before we leave the driveway, and we’ll provide the documentation your insurer needs to verify the upgrade. Many Big Coppitt Key homeowners report meaningful annual savings. Call (813) 320-9346 for a free estimate and we’ll show you the paperwork trail we’re going to produce.
Get Your Free Window Installation Estimate in Big Coppitt Key
The first step is simple: call (813) 320-9346 and we’ll schedule a time to measure every opening, inspect the framing, and put a written line-item quote in your hands. No pressure, no surprise line items later, no second appointment left hanging. If the pane is not true, the job is not done, and we’ve been doing it that way since 2008. Call today and find out what a square deal on windows looks like.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Big Coppitt Key and the Lower Florida Keys since 2008.
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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