Window Replacement in Marathon - Free In-Home Measure, Written Price

Fast, Reliable Window Replacement Across Marathon

Window replacement in Marathon, FL comes down to one hard fact: this island sits in the High Velocity Hurricane Zone, and every unit we install has to carry a Miami-Dade Notice of Acceptance. Not just an “impact-rated” sticker. The real NOA document. We’ve been doing exactly that work across Marathon for years, from the concrete block homes off Sombrero Beach Road to the elevated rebuilds that went up after Irma. Our crews know the permits Monroe County requires, the block cutting these older openings demand, and the salt air that eats ordinary hardware. If you need a straight answer and a written quote, call (754) 238-2201. A live person picks up.

Call (754) 238-2201

Why TruePane Windows & Doors Is Marathon’s Preferred Window Replacement Company

Marathon homeowners tend to be specific about what they want. They’ve been through at least one storm season out here, they’ve watched neighbors replace windows twice because the first contractor used mainland shortcuts, and they read the fine print. That’s the customer we’re built for.

TruePane is led by Dale Kessler, a second-generation glazier who founded the company in 2008 on a rule that’s still on the whiteboard: if the pane is not true, the job is not done. We’re authorized installers for more than a dozen manufacturer lines, including PGT, CGI, and Ply Gem, and we quote those lines side by side on paper so you see exactly what you’re buying. Every job is covered by the Done Right Promise. Both manufacturer warranty layers get registered in writing before the truck leaves your driveway. That’s the Keystone Standard, and we put it in writing for every Marathon customer.

Our technicians are background-checked and uniformed. They measure every opening twice. They know that a 1960s jalousie opening on Key Vaca is rarely square and almost never matches a modern HVHZ frame dimension. We keep a live person on the phone 24 hours a day, seven days a week. No voicemail tree, no regional call center. When you call about a window in Marathon, you get a person who knows Marathon.

Our Window Replacement Services in Marathon

Most of the work we do in Marathon falls into four buckets. Here’s how each one works on this island specifically.

Full Frame Replacement

This is the job where we remove the entire old window down to the rough opening, inspect the framing and waterproofing, and set a brand-new unit. In Marathon, full frame replacement almost always involves cutting or infilling concrete block. Those 1950s to 1970s CBS homes were framed around slim jalousie profiles, and modern HVHZ-rated impact units are deeper and wider. We handle that block work in-house, and Monroe County inspectors know our work. A typical full frame replacement in Marathon runs $900 to $2,400 per opening, depending on unit size, frame material, and how much concrete work the opening requires.

Storm Window Replacement

Storm window replacement in Marathon isn’t a seasonal add-on. It’s the primary line of defense. Every unit we install here carries a Miami-Dade NOA, which means the product has passed the large-missile impact test and cyclic wind-load testing that the HVHZ code requires. We install PGT, CGI, and CWS impact units regularly, and we register both warranty layers in writing. A typical HVHZ storm window replacement in Marathon runs $800 to $1,900 per unit installed, with laminated glass, stainless hardware, and full perimeter anchoring. This is not the mainland “impact-rated” product that Monroe County will reject at permit close-out.

Energy-Efficient Upgrade

Marathon’s heat and humidity don’t let up from May through October. Low-E glass with argon fill cuts solar heat gain measurably, which matters when your AC runs ten months a year and Florida Bay humidity is pressing against every seal. For older Marathon homes still running single-pane or jalousie glass, an energy-efficient replacement changes thermal comfort immediately. We’ve measured interior wall temperatures drop by 6 to 9 degrees near replaced openings. A typical low-E argon replacement in Marathon runs $700 to $1,500 per opening, before any block work or frame repair. The savings show up on the electric bill, but the comfort is what most homeowners notice first.

Trusted Brands We Service in Marathon

We are authorized installers for PGT, CGI, and Ply Gem, among a dozen other lines, and we service what we install. For Marathon customers, that means we keep marine-grade replacement hardware, stainless fasteners, and common weatherstripping profiles stocked where they’re actually needed, not at some mainland warehouse two hours away. When a PGT sash develops a salt-air issue on Key Vaca, we don’t order a mystery part and hope. We quote the repair in writing and schedule it. If the unit is under a registered manufacturer warranty, we’re already the installer of record, so the claim is straightforward. That’s the point of registering both warranty layers before the truck leaves the driveway.

Common Window Replacement Problems We See in Marathon Homes

After years of opening up walls and pulling out old jalousies on Key Vaca, some problems show up often enough we can describe them before we start.

• Rough openings that don’t match modern HVHZ units. The old jalousie frames are slim, and an impact-rated window needs real depth. A contractor who forces a modern unit into an undersized opening cracks the block, breaks the flashing seal, and leaves the window leaking at the first hard rain.
• Salt-air corrosion on hardware and frame corners. Marathon has ocean on both sides, and no inland buffer. Regular aluminum hardware degrades fast here. We use marine-grade stainless components and inspect frame corners for corrosion at every install, because a loose sash against the jamb is a leak waiting for the next storm.
• Permit failures from non-NOA products. We have seen too many Marathon homeowners pay for “impact-rated” windows that Monroe County rejected because the unit never had a Miami-Dade NOA. They paid twice: once for the wrong product, once for the right one. We pull permits before ordering glass, not after installation.
• Failed waterproofing behind the old frame. When we remove a window from a 1960s CBS home, the original felt or tar paper behind the jamb is usually degraded by decades of heat and humidity. If we don’t replace that wrb layer, the best new window in the world leaks. We flash every opening with adhered tape and set sill pans before the new unit goes in.

Pricing for Window Replacement in Marathon, FL

We Also Serve Cities Near Marathon

Our crews regularly work up and down the Keys, from Key Colony Beach and Big Pine Key to Tavernier and Key Largo. If you’re in any of those communities and need Window Replacement done to HVHZ code, we’ll bring the same inspection-first approach and written pricing to your door. Scheduling for Marathon and the rest of the Middle Keys is handled by our South Florida office, but the crew that shows up knows the Keys.

FAQs - Window Replacement in Marathon

Get Your Marathon Window Replacement Done Right

If you’re replacing windows in Marathon, you want a company that knows the HVHZ code, has cut concrete block on Key Vaca, and will still answer the phone in five years. That’s TruePane. We’re led by Dale Kessler, we stand behind every install with the Done Right Promise, and we put both warranty layers in writing before the truck leaves your driveway. Call (754) 238-2201 for a free estimate. A live person answers, day or night.

Written by Dale Kessler, Owner at TruePane Windows & Doors. TruePane serves Marathon and the surrounding Florida Keys with window replacement, door replacement, and impact-rated solutions built for the High Velocity Hurricane Zone.