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CWS Windows & Doors in Marathon, FL | TruePane Windows & Doors
We provide independent CWS sales and service across Marathon, from Key Vaca’s Gulf side to the Atlantic-facing streets, and we carry OEM CWS glass, IGUs, and hardware for same-week turnaround. What makes our CWS work different here is simple: every unit we touch in Marathon gets a facade-by-facade design pressure calculation because this city splits building code zones by address. Call (754) 238-2201 for a free estimate. We are not a CWS factory store. We are TruePane Windows & Doors, a local independent CWS sales & service provider working for you, not the manufacturer.
Why Marathon Residents Choose Us for CWS Service
We have been rebuilding and replacing CWS frames across Florida for years, but Marathon reset our standard for what passes a job. The wind-load rules here require Miami-Dade Notice of Acceptance paperwork on every impact opening, and Monroe County inspectors check load path, not just glass rating. A CWS 8500 impact casement that passes in Fort Myers might fail a Marathon permit if the elevation zone wasn’t split correctly. We know the difference. Dale Kessler grew up in Kendall and has been measuring, sourcing, and setting windows and doors in South Florida for going on three decades, including Coral Gables Cws service work. He still measures every job himself. The rule on our whiteboard hasn’t changed: measure it right the first time, or plan on coming back.
We are local to Marathon service area. Our technicians know that a 1973 CBS house on 62nd Street Gulf side likely still has original jalousie openings, that the north facade sits under different code than the south, and that the salt here comes at every elevation from two directions. We hire local, train apprentices into journeymen, and we answer the phone with a live person 24 hours a day.
Common CWS Windows & Doors Problems We Solve in Marathon
- Corner weld pitting on CWS 9400 Series aluminum frames. Marathon’s omnidirectional salt spray from Florida Bay and the Atlantic eats aluminum frame rail corners within 8 to 12 years. We see blistering and electrolytic pitting on both elevations, not just the side facing the street. This is the most common CWS failure here, and it usually starts at the weld.
- Fogged IGUs on north-facing CWS fixed windows. Coral limestone bounces UV and humidity from both bays, so sealed units on north walls fog within 5 to 7 years even when the panel never gets direct sun. The argon leaks out, condensation forms between panes, and the glass looks cloudy from the inside. We replace the IGU with OEM glazing.
- Roller and track binding on CWS sliding glass doors. Fine coral dust and marine grit build up inside stainless tracks faster here than anywhere on the mainland. Sweeping never clears it. We routinely disassemble tracks, ultrasonic-clean them, and replace frozen rollers so the door slides instead of dragging.
- Failed retrofit of a CWS impact unit into an original jalousie opening. Pre-2010 jobs often left a half-inch masonry gap filled with spray foam. Monroe County inspectors now flag and reject those on permit close-out. We pull the unit, cut the block correctly, and re-set the frame with the proper load path.
- Worn multi-point lock hardware on impact doors. Salt corrosion accelerates wear on CWS multi-point locks in Marathon. We replace with OEM stainless hardware because the NOA approval depends on original-spec parts.
CWS Service in Marathon: What Local Conditions Mean for Your Equipment
Marathon is the only city in Florida where the same home can have its south facade inspected under Miami-Dade HVHZ wind rules while its north facade falls inside the Florida Building Code’s coastal A zone. Monroe County’s permit routing depends on which side of the street the address sits on. That means a CWS replacement here cannot be a single NOA lookup. Every job we do includes a facade-by-facade design pressure calculation because failing to split the elevation zones is the most common cause of a Marathon permit rejection. If you live on the Gulf side of Key Vaca, your Atlantic-facing wall is not the same as your Florida Bay-facing wall under code, and your CWS units must be spec’d accordingly. Most mainland contractors - even those offering Cws service in Key West - don’t know this exists. It cost Dale an afternoon with the Monroe County building official to understand the routing, and it’s the first thing our techs check now.
CWS Models & Products We Service in Marathon
We service the full CWS lineup that matters in Marathon’s salt and wind environment: the 9400 Series fixed and casement windows, the 7700 Series single-hung and horizontal slider, the 8500 Series impact casement with Miami-Dade NOA, and the ES-5000 and ES-7000 impact sliding glass doors. On impact-rated units we install only OEM CWS glazing, IGUs, and multi-point lock hardware because aftermarket parts do not carry the NOA approval and can void the opening’s compliance. For non-impact interior trim and sash clips, a quality marine-grade aftermarket part works fine. If a CWS unit is older than 15 years in Marathon’s salt environment, we typically recommend full-frame replacement rather than repair. We stock OEM CWS parts locally for faster turnaround.
Services We Emphasize for Marathon Homes
Hurricane impact windows, full frame replacement, and wind mitigation and code compliance are the three jobs we do most on CWS units here. The 1950s through 1970s CBS homes that dominate Key Vaca were framed around slim jalousie profiles, so swapping those out for modern HVHZ-rated impact units almost always requires concrete cutting or block-infill work. That’s routine for us in Marathon.
CWS Service Pricing in Marathon
CWS window and door service in Marathon varies by job. A simple IGU replacement on a CWS 9400 fixed unit typically runs $380 to $750. Replacing a corroded multi-point lock on an impact door runs $280 to $550. Rebuilding a CWS sliding door track with OEM rollers and ultrasonic cleaning runs $220 to $480. Full-frame replacement of a jalousie opening with a new CWS 8500 impact casement starts around $1,800 per opening including block cutting, but the final number depends on elevation zone, access, and how much concrete work the rough opening needs. Every estimate includes a written line-item quote with both warranty layers registered in writing. Call (754) 238-2201 to schedule your free estimate. We’ll come out, measure, and give you exact numbers on paper.
Serving Marathon, FL - Our Local Coverage Area
We’re based in the Marathon area and know this community well, and we also handle Key Colony Beach Cws service calls. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - CWS Windows & Doors in Marathon
Because Marathon sits inside Florida’s High Velocity Hurricane Zone, which Key West does not fully fall under the same way. The HVHZ designation requires every window and door to carry a Miami-Dade Notice of Acceptance, a stricter certification than standard impact ratings elsewhere in Florida. Monroe County inspects load path, not just glass rating. If your CWS unit lacks the NOA, the opening won’t pass permit close-out. Call (754) 238-2201 and we’ll check your existing units against current code before you spend money.
Yes, but not directly. The original jalousie framing is too slim for a modern HVHZ-rated CWS impact unit. We cut back the concrete block or add infill, set the new frame on a proper load path, and schedule the Monroe County inspection the same day the load-path letter is stamped. This is standard work for us in Marathon.
Aluminum with marine-grade hardware lasts longer here. CWS 8500 Series impact casements and 9400 Series aluminum frames hold up better than vinyl under Marathon’s double-salt front, provided the corner welds are maintained and the hardware is OEM stainless. Vinyl expands and contracts more under 90-degree heat and 85 to 95 percent humidity, which shortens seal life on some lines.
Only if the existing frame carries its own NOA and is in structurally sound condition. If the frame has corner weld pitting, rail blistering, or was improperly retrofit into a jalousie opening before 2010, Monroe County will not pass the opening on glass replacement alone. We’ll tell you honestly whether your frame is worth saving or whether full-frame replacement is the better call. Estimates are free at (754) 238-2201.
Because coral limestone bounces reflected UV and humidity from both Florida Bay and the Atlantic, and that reflected exposure is enough to break IGU seals within 5 to 7 years. The argon gas leaks out and moisture gets between the panes. We replace the sealed unit with OEM CWS glazing rather than a cheap aftermarket IGU that won’t match the frame’s thermal spec.
Service Areas Near Marathon
We serve Marathon and the surrounding Keys communities. If you’re in Anna Maria, Acacia Villas, Alafaya, Altamonte Springs, Altoona, or Apollo Beach, we can route a tech to you. Our CWS service in Margate and CWS service in Medley teams cover the broader region, but Marathon jobs get priority when storms are in the forecast.
Book Your CWS Service in Marathon Today
For CWS windows and doors in Marathon, the first step is a phone call. We’ll talk through what you’re seeing, schedule a time to measure, and give you a written line-item quote before any work begins. Call (754) 238-2201 now. A live person answers, 24 hours a day.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Marathon and the Florida Keys. Dale trained at Miami Dade College’s vocational program and has been measuring, sourcing, and setting windows and doors in South Florida for going on three decades.
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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