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CWS Windows & Doors in Marathon, FL | TruePane Windows & Doors
We provide independent CWS windows and doors service across Marathon, FL, including repair, replacement, and hurricane-impact upgrades, and we offer similar Cws service in Key West. The one thing that makes our CWS work here different is simple: Marathon sits inside Florida’s High-Velocity Hurricane Zone (HVHZ), so every CWS window or door we touch has to meet Miami-Dade Notice of Acceptance standards or it isn’t legal. That’s not a premium option, it’s the code floor. If your CWS windows are aging, sticking, or corroding, call us at (813) 320-9346 and we’ll tell you straight what you’re dealing with.
We’re TruePane Windows & Doors, and we’re independent. We’re not the manufacturer and we’re not a CWS-authorized dealer. That matters because we make repair-versus-replace calls based on what’s right for your home, not on moving product. For a full picture of our CWS sales & service capability, start there. For now, here’s what Marathon homeowners need to know about their CWS equipment.
Why Marathon Residents Choose Us for CWS Service
We’ve repaired and replaced CWS windows and doors across Marathon service area homes since before Hurricane Irma. That storm, in September 2017, reshaped this island’s housing stock and taught every contractor here what salt air, storm surge, and HVHZ code enforcement actually do to a window over time. We’ve documented hundreds of on-island CWS installations and their failure patterns under continuous dual-salt exposure. That field history means we know which CWS components fail first on canal-front homes, which ones hold up, and when it’s smarter to replace a frame than patch it again.
Dale Kessler, who started TruePane, learned glazing at Hillsborough Community College’s construction technology program and spent more time on the shop floor than in a classroom. He’s been measuring, setting, and sealing windows and doors for the better part of two decades. The standard he runs this company by, and the one our techs work to on every Marathon job, is simple: if the pane is not true, the job is not done. We hire local, we train our own people, and we plan to be in Marathon in thirty years.
Common CWS Windows & Doors Problems We Solve in Marathon
- Jalousie hardware seizure. Older Marathon homes, especially pre-code ranch-style CBS houses along US-1, still carry original jalousie windows. CWS jalousie operators and linkage gears corrode quickly in this salt environment, and we regularly arrive to find louvers that won’t close or lock. When wind comes, those open louvers are a direct breach. We replace the operator gears and linkage with marine-grade stainless components where the manufacturer’s default hardware would fail again.
- Aluminum frame pitting at the sill and weep hole blockage. On canal and bayfront homes, CWS frame corners show visible corrosion within 15 years. Weep holes clog with salt deposits and wind-blown sand, and water gets trapped under the sill. That’s hidden intrusion you don’t see until the drywall stains. We clear the weep system and, where the frame pitting has gone too far, we quote replacement before dry rot spreads deeper.
- Weatherstripping compression set. Marathon’s sustained trade winds and UV load flatten CWS weatherstripping into a hard, ineffective profile. The result is air leakage you feel on a calm day and pressure-driven water intrusion during thunderstorms. We replace with DB-rated neoprene seals that meet HVHZ code, not just the manufacturer’s standard spec.
- Roller and track failure on CWS 5000 sliding glass doors. Wind-driven sand and salt accumulate in the bottom track of CWS 5000 sliders, especially on ground-level canal homes. Rollers wear flat, the door jumps the track, and the panel binds. We replace rollers with marine-grade stainless units and install new track inserts where the original channel is pitted beyond function.
- Single-pane and pre-code glass that won’t pass insurance inspection. A lot of Marathon homeowners inherited 1970s and 1980s single-pane aluminum CWS windows. Those units don’t just leak, they’re non-compliant under Monroe County code and often uninsurable after a wind mitigation inspection. We sit down with homeowners and walk through replacement options side by side so they understand exactly what they’re buying.
CWS Service in Marathon: What Local Conditions Mean for Your Equipment
Here’s the fact that shapes everything about CWS service on this island. Marathon is a narrow strip roughly a mile wide at its widest, with the Atlantic on one side and Florida Bay on the other. That means every CWS window and door gets attacked by salt air from two directions simultaneously. It’s not an exaggeration to say we’ve worked on homes where the ocean-facing side of a CWS frame still looks workable while the bay-facing side shows advanced pitting and corrosion, on the same structure, same year of installation. Salt-spray moves up from below on canal-front and bayfront properties, so sill pans, door thresholds, and frame weep holes corrode and clog far faster than any manufacturer’s specification sheet predicts. That’s why our techs in Marathon spec marine-grade stainless fasteners and neoprene seals over standard hardware even when the manufacturer’s default would technically pass code. The code is a floor. The environment here is harsher than the code assumes.
We saw this play out at a canal home off Sombrero Beach Road. A CWS 5000 sliding glass door kept jumping its track after every thunderstorm. Our crew removed the door panel and found the original steel rollers rusted flat on the bay-side track. We replaced them with marine-grade stainless rollers, installed a new track insert, and adjusted the CWS weatherstripping to stop pressure-driven water from entering the track. A month later the owner said the door opened smoothly even after a squall came through with 40 mph gusts. That’s the kind of fix that only comes from knowing this island’s conditions.
CWS Models & Products We Service in Marathon
We service the CWS 1000 Series aluminum single hung, the CWS 3000 Series horizontal rolling window, the CWS 5000 Series sliding glass door, and the CWS 7000 Series fixed picture window. We source factory CWS replacement parts when lead times allow. But for high-failure components like rollers, locks, and weatherstripping, we use marine-grade stainless fasteners and DB-rated neoprene seals that meet HVHZ code. When a CWS frame or glass unit is within five years of its expected corrosion life, we recommend full replacement rather than incremental repair. It’s the honest call, and it’s the one we’d make on our own homes.
CWS Service Pricing in Marathon
Here’s what CWS service typically costs in Marathon, line by line, so you can plan:
- Service call and diagnostic: $89 to $149
- Jalousie operator or linkage replacement: $45 to $120 per window, parts included
- Roller and track replacement on a CWS 5000 slider: $180 to $340 per door
- Weatherstripping replacement, single window: $60 to $150 per unit
- Frame corner corrosion repair: $120 to $280 (when repair is safe and code-compliant)
- Impact window or door replacement, full unit: varies by line and opening size, quoted in writing
What drives cost here more than anything is the condition of the frame and whether the existing opening already meets current HVHZ anchoring requirements. If it doesn’t, the quote reflects the additional work, not a surprise line item later. Our estimates are free, written, and locked once you approve. Call (813) 320-9346 and we’ll put numbers on paper before any work begins.
Serving Marathon, FL - Our Local Coverage Area
We’re based in the Marathon area and know this community well, and we also provide Key Colony Beach Cws service. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - CWS Windows & Doors in Marathon
No. Single-pane aluminum frames from that era cannot be retrofitted to meet Miami-Dade NOA standards. The frame design, the glazing channel, and the anchoring system all predate current code. The only compliant path is full replacement with an HVHZ-approved impact unit. Call (813) 320-9346 and we’ll show you side-by-side quotes before you commit to anything.
Marathon’s geography is the reason. The island is about a mile wide, flanked by the Atlantic and Florida Bay, so salt air attacks every elevation from two sides at once. On canal-front and bayfront homes, salt-spray also rises from below, working on sill pans and weep holes. Mainland coastal cities usually get salt exposure from one direction. Here it’s constant and doubled, which compresses corrosion timelines on aluminum frames dramatically.
Yes. Monroe County requires permits for window and door replacement, and every unit must carry a Miami-Dade Notice of Acceptance or equivalent HVHZ approval. We pull the permits, schedule the inspections, and don’t consider the job done until it passes. If it needs to be in writing to be true, we’ll put it in writing.
You can clear a surface clog carefully with a thin, flexible tool, but the bigger issue is usually what you can’t see: salt and sand packed deeper in the weep channel or corrosion inside the frame. Forcing anything rigid into the hole can damage the channel. We recommend a diagnostic call. We’ll open the weep system properly and check whether water has already been sitting under the sill.
Jalousie windows are still common on older pre-code Marathon homes, but they cannot be made hurricane-compliant with new glass alone. The louver design itself doesn’t meet wind-load requirements, and insurers increasingly flag them. We can replace jalousie hardware to keep them functional temporarily, but for compliance and insurance purposes, full replacement with an impact-rated unit is the honest long-term answer. Call (813) 320-9346 for an exact quote, estimates are free.
Service Areas Near Marathon
We handle CWS service throughout Marathon and the surrounding Keys, including Grassy Key, Key Colony Beach, Duck Key, and Big Pine Key. For customers north along the coast, we also offer CWS service in Margate and CWS service in Medley. If you’re within reasonable distance of Marathon, chances are we can get to you.
Book Your CWS Service in Marathon Today
If your CWS windows or doors are binding, corroding, leaking, or failing inspection, call (813) 320-9346 - we also provide Cws in Homestead. We’ll send a background-checked, uniformed tech who measures every opening twice and gives you a written quote before work starts. Done right the first time, or we make it right. That’s the promise.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Marathon and the 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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