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AfterFast, Reliable Window Installation Across Marathon
Window installation in Marathon, FL is not the same job as it is in Miami, Fort Lauderdale, or anywhere else on the mainland. Every replacement window and door in Marathon must carry a Miami-Dade Notice of Acceptance (NOA) because the entire city sits inside Florida’s High-Velocity Hurricane Zone. That one code requirement changes the products, the fasteners, the flashing, and the price. If you’re calling around Marathon right now trying to figure out why quotes are all over the map, that’s usually the dividing line: some contractors are pricing NOA-compliant work, and some are quietly pricing standard windows that will not pass inspection or survive an Irma-grade storm. TruePane Windows & Doors has been installing NOA-approved windows in Monroe County long enough to know exactly what that difference costs and exactly how to do it right the first time. Call (813) 320-9346 and we’ll walk you through it.
Why TruePane Windows & Doors Is Marathon’s Preferred Window Installation Company
TruePane is led by Dale Kessler, a second-generation glazier who started this company in 2008 because he kept seeing the same two problems on Florida job sites: out-of-true installs and warranty paperwork that never got registered. We built the company around fixing both. Every Window Installation job we do in Marathon carries The Keystone Standard, which means both manufacturer warranty layers are registered in writing before our truck leaves your driveway, and the 90-Day Done Right Promise covers our workmanship. If the pane is not true, the job is not done.
Marathon homeowners call us because the houses here test windows harder than almost any other market in the state. Salt air comes at the glass from both oceans at once, trade winds blow year-round, and the sun bakes aluminum frames until they seize. We spec marine-grade stainless fasteners on canal-front homes as a matter of routine, not as an upsell, because we have pulled enough corroded standard screws out of Marathon sills to know better. Our technicians are background-checked and uniformed. A live person answers the phone 24 hours a day, seven days a week, not a voicemail tree. And we quote manufacturer lines side by side on paper so you see exactly what you’re buying before you sign anything.
Our Window Installation Services in Marathon
Casement Windows
Casement windows are one of the most common NOA-compliant choices we install in Marathon, and for good reason. The crank mechanism compresses the sash against the frame seal, which gives you the tightest possible closure against wind-driven rain coming off Florida Bay or the Atlantic side. On elevated CBS homes along Sombrero Beach Road and the canal fingers off Aviation Boulevard, we regularly remove old jalousie units and set impact-rated casements in their place. The hardware here needs to be marine-grade stainless; standard rollers and hinges corrode within a few seasons of salt exposure. A typical Marathon casement window install runs $900 to $1,700 per opening, depending on size and manufacturer line.
Awning Windows
Awning windows hinge at the top and open outward, which makes them useful in Marathon for one specific reason: you can leave them cracked open during a passing rain band without letting water pour inside. Homes on the Gulf side and along Boot Key Harbor use them in kitchens and bathrooms where ventilation matters but the salt air is relentless. We fit them with neoprene seals and pressure-rated sill pans so trapped moisture does not sit against the frame. In Marathon, an awning window installation typically runs $800 to $1,500 per unit.
Fixed & Picture Windows
Fixed and picture windows are the workhorse of canal-front Marathon homes, where the whole point of the glass is to frame the water view. A fixed NOA-rated picture window gives you the largest possible opening with the fewest failure points, because there are no moving parts for salt to seize. We replaced twelve salt-corroded jalousie windows on a 1979 CBS ranch off Sombrero Beach Road with NOA-approved impact-rated casement and fixed picture units, using marine-grade stainless fasteners and neoprene seals after the original aluminum frames’ weep holes had clogged and the sashes seized from ocean-side salt spray. That is the kind of job we do in Marathon every month. Fixed window installation ranges from $700 to $2,400 per opening depending on glass type, size, and whether the unit is a standard rectangle or a custom shape.
Single & Double Hung
Single and double hung windows are common in the older ranch-style CBS homes that line US-1 through Marathon, particularly in neighborhoods north of the highway that were built before the current code book was written. The existing units are often single-pane aluminum with fogged glass and frames that rattle in a stiff breeze. We replace them with NOA-rated double hung units that meet Monroe County wind load requirements while keeping the same vertical-sash look. Expect $850 to $1,800 per opening in Marathon, with the higher end reflecting custom sizing on mid-century homes that were never built to modern rough-opening standards.
What happens when you call
- 1
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 Marathon
We are an authorized installer for more than a dozen manufacturer lines, and in Marathon we lean heavily on PGT, CGI, and Simonton for impact-rated units. Those three brands have deep Miami-Dade NOA documentation, which makes the permitting and inspection process in Monroe County far smoother. When we quote a window job in Marathon, we put the manufacturer lines side by side on paper, with warranty durations stated in writing, so you can compare glass packages and frame materials before you commit. We carry local stock on common Marathon sizes, which shortens lead times when a single pane goes bad and you need a fast replacement.
Common Window Installation Problems We See in Marathon Homes
- Non-compliant windows with no NOA. Homes built before the early 2000s in Marathon often have standard single-pane or jalousie windows that technically cannot be insured against wind damage under current Monroe County code. If you file a claim after a storm and the window was never NOA-approved, the carrier can deny the loss. We flag this on every quote.
- Salt-corroded fasteners and hardware. Canal-front and bayfront homes in Marathon take salt spray from below as well as from the sides. Standard aluminum or zinc fasteners that would last decades inland here turn to chalk in a few hurricane seasons. We spec marine-grade stainless on any opening within a hundred feet of saltwater.
- Clogged weep holes causing sill rot. Even impact-rated glass does not help if the frame’s weep holes are clogged with salt and sand, trapping moisture against the sill pan. On elevated CBS homes, that trapped salt moisture rots the sill from the inside while the glass looks perfectly fine.
- Jalousie windows still in place. The old louvered jalousie windows that were once everywhere in the Keys provide almost no wind or impact resistance. They cannot be retrofitted to meet NOA standards. They have to come out, full stop. We remove them and replace with code-compliant units.
Pricing for Window Installation in Marathon, FL
Window installation in Marathon runs higher than the same job in Homestead or Miami, and that is not contractor markup, it is the HVHZ code at work. A standard NOA-rated single hung starts around $850 per opening, with casements and awning units in the $900 to $1,700 range, fixed picture windows running $700 to $2,400 depending on glass and custom sizing, and full-home jobs on older CBS ranch homes often landing between $12,000 and $28,000 for twelve to sixteen openings. Marine-grade stainless fasteners, pressure-rated sill pans, and the required NOA paperwork all add line items that mainland quotes simply will not include. We give you a written line-item quote before work starts, and the price on that quote is the price you pay. Call (813) 320-9346 to schedule a free estimate, and we will scope the job properly the first time.
We Also Serve Cities Near Marathon
Our crews run up and down the Keys from a South Florida dispatch office, so Window Installation in Marathon is one stop on the same route we take to Key Colony Beach, Big Pine Key, Tavernier, and Key Largo. If you’re on a side street off US-1 in Marathon or a canal lot a few miles up the road, the same NOA code rules apply and the same crew covers the work.
Key Takeaways
- Every replacement window in Marathon must carry a Miami-Dade NOA. Standard windows are illegal under Monroe County code.
- Salt air from both the Atlantic and Florida Bay corrodes standard hardware years faster in Marathon than on the mainland.
- Marine-grade stainless fasteners and neoprene seals are standard spec for TruePane on Marathon canal and bayfront jobs.
- We quote PGT, CGI, and Simonton side by side, with warranty durations in writing before work starts.
- A live person answers the phone 24/7 at (813) 320-9346. The estimate is free.
Serving Marathon, FL - Our Local Coverage Area
We’re based in the Marathon 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 Marathon
Yes, you need them. The entire city of Marathon sits inside Florida’s High-Velocity Hurricane Zone, which means Monroe County code requires a Miami-Dade Notice of Acceptance on every replacement window and door, regardless of whether your house faces the Atlantic, Florida Bay, or a protected canal off Vaca Cut. An insurance carrier can deny a wind damage claim on a non-compliant window, and the building department will not pass the inspection. This is a code floor, not a coastal upgrade. Call (813) 320-9346 and we will show you the exact NOA documentation for the windows we spec.
Storm panels do not bring a jalousie window into compliance. The underlying window still has no impact rating, no pressure rating, and no NOA document. Under current Monroe County code, replacement windows themselves must meet HVHZ standards; you cannot panel your way around a non-compliant frame. We remove jalousie windows in Marathon regularly and replace them with NOA-approved casement, awning, or fixed units. It is the only way to make the house insurable and code-legal.
Three reasons. First, Marathon is in the HVHZ, so every unit must be NOA-rated, which is a more expensive product than the standard impact window sold north of the Monroe County line. Second, salt-air exposure means we spec marine-grade stainless fasteners and neoprene seals as standard practice, not as an upgrade. Third, the housing stock here is older and smaller-scale, so almost every opening requires custom sizing and there are no economies of scale on a 1970s CBS ranch. A same-size window that costs $600 installed in Homestead can run $900 to $1,200 in Marathon before you even factor the permit. We put every line item on paper so you can see exactly where the money goes.
Once a year, and we recommend doing it before hurricane season starts in June. Marathon’s unique geography means salt air hits every elevation of the house, not just the ocean-facing side, so weep holes, sill pans, and exterior hardware all need a visual check. our maintenance check covers exactly this: a technician cleans the weep holes, lubricates the hardware, inspects the seals, and flags any corroding fastener before it becomes a failure. Call (813) 320-9346 to book it.
In most cases, yes. Marathon carriers weigh wind mitigation credits heavily, and a NOA-rated impact window that is documented and registered is often the single biggest discount item on the policy. The key is that the documentation has to be in order; if the installer never registered the warranty or handed you the NOA paperwork, the carrier has nothing to verify. That is exactly why we register both manufacturer warranty layers in writing before our truck leaves your driveway. Ask your agent for a wind mitigation credit after the install and give them the paperwork we provide.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Marathon and the Florida Keys. If the pane is not true, the job is not done.
Ready to get a real price on window installation in Marathon? Call (813) 320-9346 to schedule your free estimate. We’ll measure every opening twice, put the manufacturer lines side by side on paper, and give you a written quote that will not change once the work starts.
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.