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CGI Windows & Doors in Marathon, FL | TruePane Windows & Doors
TruePane Windows & Doors provides independent Key Colony Beach Cgi service across Marathon, from replacement sashes to full impact retrofits. We’re not a CGI dealer and we’re not manufacturer-affiliated, which means our recommendation on any job is driven by what works in Marathon’s salt air, not by what moves inventory. What makes our CGI work different here is simple: our crews have been pulling apart CGI units in the Keys since before Irma, and we know which models and hardware hold up when both the Atlantic and the Gulf are throwing salt at the same house. Call (954) 280-4413 for a free estimate on any CGI repair or replacement.
Why Marathon Residents Choose Us for CGI Service
CGI builds a serious impact product, but no factory in Miami can tell you how a specific window will behave on an elevated lot off Sombrero Beach Road after five hurricane seasons. That knowledge comes from field time, and we’ve put in the hours. Dale Kessler founded TruePane in 2008 after years of watching out-of-true installs and voided warranties in South Florida’s coastal corridor, and the rule he keeps on the whiteboard still governs every job we take in Marathon: if the pane is not true, the job is not done.
We’ve worked CGI sales & service calls across the Keys long enough to read the specific corrosion patterns this geography produces. A background-checked, uniformed technician arrives on time, measures every opening twice, and quotes the repair in writing before work begins. If it is not right on paper, it will not be right on the wall. That’s not a slogan here. It’s the only way to run a window company in a place where the wrong hardware decision costs a homeowner thousands within three years.
Common CGI Windows & Doors Problems We Solve in Marathon
These are the calls we take most often from Marathon homeowners, and each one traces back to something specific about this environment.
- Salt pitting on frame corners and hardware. Older CGI units with original aluminum hardware facing the Atlantic side show pitting within three to four years in Marathon. The salt spray here is relentless, and once pitting starts on a corner or latch, it spreads. We replace with marine-grade stainless equivalents that outlast the original spec.
- Sash drop and hard operation on double-hungs and sliders. Salt and sand work their way into spring-loaded balances and rollers, and the result is a sash that won’t stay up or a slider that takes two hands to move. On older CGI Sentinels especially, we see this in elevated homes where wind-driven salt reaches every track.
- Fogging between panes on non-impact IGUs. Marathon’s humidity rarely drops below 80%, and that constant moisture accelerates seal failure in insulated glass. A CGI unit that would fog at year ten on the mainland can show delamination at year five here. If the seal is gone, the glass package gets replaced with a true impact-rated IGU rated for this wind zone.
- Weep system blockage and water intrusion at sill pans. Wind-driven salt and Sargassum debris clog the weep holes on elevated homes, and rainwater backs up into the frame. We clear and re-flash the sill when needed, then set the homeowner up with a cleaning schedule so it doesn’t return.
- Frozen latches and corroded strike plates. This one’s more common on the Gulf-facing side than people expect. The hardware seizes from salt exposure, and a homeowner discovers it the night a storm is tracking toward the Keys. We keep common CGI hardware stocked for Marathon service calls so the fix doesn’t wait on a freight truck.
CGI Service in Marathon: What Local Conditions Mean for Your Equipment
Here’s something you won’t read on a generic CGI dealer page. Marathon is one of the few municipalities in the Florida Keys where both the Atlantic and the Gulf sit within walking distance of most lots. That means a single CGI window can take direct salt spray from one direction and leeward humidity from the other within the same day. The practical result is a dual-direction corrosion pattern: pitting and hardware seizure on the windward side, and seal-weakening humidity on the leeward side. A mainland installer who’s never worked the Keys wouldn’t know to look for both on the same house, which is why experience matters more than any Cgi service in Key West could offer from afar.
We learned to read those patterns the hard way, and now we diagnose fast. On an elevated CBS home off Sombrero Beach Road, our tech found two original CGI Estate double-hungs with frozen latches and pitted aluminum on the Gulf-facing side, while the Atlantic-side units showed only early fogging. We replaced the sashes with marine-grade stainless balances and true impact glazing, re-flashed the openings to current Monroe County code, and left the homeowner with a wind mitigation report that dropped their insurance premium by 18%. That’s the difference between a CGI technician and a technician who actually knows Marathon.
CGI Models & Products We Service in Marathon
Our crews work on the full CGI residential line in Marathon, including the Estate Collection, Sentinel Impact Series, Custom 800 Series, and Commercial Impact Series. When a repair involves structural or water-shedding components like sills, mullions, or impact glazing beads, we use genuine CGI factory parts. For non-structural hardware like balances, rollers, and weatherstripping, we stock marine-grade stainless aftermarket equivalents that genuinely outlast the originals in this salt air. We only recommend full replacement when frame corrosion has penetrated beyond surface oxidation or the original unit is non-impact and can’t be retrofitted economically. That’s the square-deal answer, and we’ll show you the reasoning on paper.
CGI Service Pricing in Marathon
CGI service pricing in Marathon runs between $150 and $800 for most hardware and seal repairs, with full-frame impact retrofits starting around $1,200 per opening depending on size and whether the rough opening needs re-flashing to current Monroe County code. Here’s what that looks like in practice:
- Roller, balance, or latch replacement: $150-$350 per unit, including marine-grade hardware
- IGU replacement with impact glass: $400-$800 per sash, depending on size and glass package
- Weep system cleaning and sill re-flash: $150-$300 per window
- Full-frame impact replacement: $1,200+ per opening, permit and wind mitigation report included
Your free estimate includes a full measurement, a written line-item quote, and a straight answer on whether repair or replacement makes sense for your specific unit. No change orders, no surprise line items. Call (954) 280-4413 and we’ll put it in writing.
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 - CGI Windows & Doors in Marathon
Yes, in many cases you can. If the frame is structurally sound with no penetration beyond surface oxidation, we can install true impact-rated glazing into the existing CGI frame and bring the opening into compliance, just as we do with our Cgi in Homestead projects. The frame gets inspected corner to corner first, because Marathon’s salt air can hide corrosion where the mullion meets the sill. If the frame passes, the insert route saves thousands per opening. Call (954) 280-4413 and we’ll inspect your frames and tell you straight which route applies.
That fog is a seal failure, and Marathon’s constant 80%+ humidity is usually the accelerant. The insulating glass unit loses its seal, moisture gets between the panes, and the glass delaminates. This happens faster here than almost anywhere on the mainland. The fix is an IGU replacement with a properly sealed impact-rated glass package, not a whole new frame. Call us at (954) 280-4413 for an exact quote on your glass size.
A Miami condo sits behind other structures and gets one-sided wind exposure. A Marathon home sits on pilings with open water on both sides. That means the window has to hold up under 180+ mph design wind pressure with salt spray hitting from multiple directions, not just one. Monroe County’s impact requirements reflect that difference, and your CGI units need marine-grade hardware and properly flashed sills to survive it. We spec for Marathon specifically, not for the mainland.
Every three to four months during the wet season, and once more before hurricane season. Wind-driven salt and Sargassum debris build up quickly here, and blocked weep holes mean water sits in the sill pan and works its way into the frame. We offer a maintenance check that covers track cleaning, weep clearing, hardware inspection, and lubrication on your CGI units. Call (954) 280-4413 to get on the schedule before the next storm.
Yes, and this is one of the most common calls we take in Marathon. The moment a permit gets pulled, Monroe County flags every jalousie opening for mandatory impact-rated replacement. The openings can stay as they are in many cases, and CGI insert replacements fit standard jalousie rough openings with minimal framing work. We measure each opening twice, quote the inserts line by line, and handle the permit paperwork so the remodel doesn’t stall. Call (954) 280-4413 for a free estimate on your jalousie-to-impact conversion.
Service Areas Near Marathon
We serve Marathon proper and the surrounding Keys communities, including Key Colony Beach, Sombrero Beach, Duck Key, and over the bridges toward Big Pine Key. Our crews are familiar with Marathon service area roads and the specific corrosion patterns each neighborhood produces. If you’re in a nearby community looking for CGI service in Margate or CGI service in Medley, our Broward teams handle those calls with the same field standard.
Book Your CGI Service in Marathon Today
If your CGI windows are fogging, sticking, or showing salt pitting, get it looked at before the next storm tracks toward the Keys. A live person answers the phone 24/7, and most Marathon service calls are completed in a single visit. Call (954) 280-4413 for your free estimate, and we’ll have a technician out with a written quote.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Marathon 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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