Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Window Replacement Across Windermere
Window replacement in Windermere means working on custom lakefront homes that were built to frame Butler Chain views, not to make a glazier’s life easy. A typical full-frame replacement here runs $1,800 to $4,200 per opening, and the lead time on custom impact-rated units is usually four to eight weeks once we lock the order. We are TruePane Windows & Doors, and we have been setting glass in these estates long enough to know that the right window for a 1999 picture wall off Lake Butler Boulevard is not sitting on a shelf in Winter Garden. Call (754) 238-2201 and a live person will answer, day or night. We measure twice, quote both manufacturer warranty layers in writing, and fix the price before the factory order goes in.
Key Takeaways
- Windermere lakefront homes frequently require custom-ordered impact windows that take 4-8 weeks, not off-the-shelf replacements.
- Full-frame replacement in Windermere typically runs $1,800-$4,200 per opening depending on size, glazing, and framing condition.
- Every job carries the Done Right Promise, and both manufacturer warranty layers are registered in writing before our truck leaves your driveway.
- We answer the phone 24/7. No voicemail tree, no callback form, no regional call center.
Why TruePane Windows & Doors Is Windermere’s Preferred Window Replacement Company
Windermere homeowners tend to remember the contractor who left them with a fogged seal and a sliding door that binds every July. We hear those stories when we walk a job. Dale Kessler founded this company in 2008 on a rule that still hangs on the whiteboard: if the pane is not true, the job is not done. Our technicians are background-checked and uniformed, and they measure every opening twice before anything gets ordered. In a town where a custom corner window can cost more than a used sedan, that second measurement matters.
We do not sub-contract the work out to a crew that disappears after the final check. Our Window Replacement crew handles the install, and our Done Right Promise means if something is off, we fix it. No paperwork fights, no arguing about who is responsible. We register both manufacturer warranty layers in writing, with durations stated, before we leave. That is The Keystone Standard, and it applies to every window we set in Windermere, from a small casement on a carriage house to a twelve-foot pocket slider on a lakefront great room.
Dispatch and scheduling are coordinated from our South Florida office, but the crews who work in Windermere live in the region and know the roads. They know that a house off Park Avenue in the historic district has different trim requirements than a 2006 stucco estate off Maguire Road. They know Orange County’s current Florida Building Code triggers better than most, because we have been called in to fix too many retrofits that were signed off without proper impact ratings on lake-facing elevations.
Our Window Replacement Services in Windermere
Full Frame Replacement
Full frame replacement is the most common job we do in Windermere, and it is the only option when the original window was set wrong, the sill is rotting from lake humidity, or the opening itself is out of square. We strip the unit down to rough framing, re-flash the opening, square it, and set a new window that fits the way it should. On a lakeside home where builders in the late 1990s framed non-standard openings to chase water views, this is not a one-day job. It is a job done in stages, and the price is locked before we start cutting.

Insert Window Replacement
If the existing frame is still square and sound, an insert replacement goes inside the old frame and keeps the original trim intact. This works well on some of the older Windermere homes near the Butler Chain, especially where the interior casing is custom millwork the homeowner wants to preserve. We measure the existing opening precisely and order the insert to the eighth-inch. When the frame has shifted or the sill is compromised, we will tell you honestly. An insert over a bad frame is a waste of your money.

Storm Window Replacement
For Windermere homes with original wood windows and separate exterior storm units, we replace the storm sashes without touching the primary window. The right storm sash cuts air infiltration and blocks wind-driven rain before it reaches the main glazing. Given the wind fetch across the open water of the Butler Chain, storm sashes on lake-facing windows take real abuse. We see bent frames, cracked glass, and corroded hardware on storms that are only ten or twelve years old.

Energy-Efficient Upgrade
Upgrading to low-E, argon-filled insulated glass changes how a Windermere home handles summer sun and lake humidity. On a south-facing great room with floor-to-ceiling glass, the right U-factor and SHGC reduces heat gain through the glass itself, which matters when your HVAC is fighting 95-degree afternoons off the water. We quote manufacturer energy specs side by side on paper so you see exactly what you are buying. For lake-facing elevations, we almost always recommend impact-rated glass with a low-E coating that meets the Florida Building Code’s exposure requirements without turning your water view into a dim, tinted disappointment.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Common Window Replacement Problems We See in Windermere Homes
- Fogged insulated glass in late-1990s picture windows. Argon leaks out, condensation shows up between the panes, and the U-factor quietly falls apart. These units were built to maximize Butler Chain views, and twenty years of humidity and UV has caught up with the seals.
- Corroded hardware and oxidized frames on lake-facing sliders. Persistent wind-driven moisture attacks aluminum frames and rollers, and sashes start to bind or fall out of square. By the time a pocket slider will not close without lifting, the track is usually worn through.
- Delaminating glazing compounds on large casements. Oversized casement windows that face the open water take brutal sun. The structural glazing compound degrades, air leaks in, and the sash loses its strength just when impact compliance becomes mandatory under the code.
- Out-of-square rough openings from original construction. Builders in the late 1990s and early 2000s framed large custom openings on lakefront estates quickly, and many have shifted. The replacement window has to be custom-ordered to fit the actual opening, not the nominal size on the old paperwork.
Pricing for Window Replacement in Windermere, FL
Windermere window pricing is driven by custom dimensions, impact ratings, and framing condition. A simple insert replacement in a standard 3×5 opening may run $900 to $1,500. A full-frame replacement with impact-rated glass in a large lake-facing picture window runs $2,800 to $4,200. Multi-panel pocket sliders and oversized custom units go higher, and a complete lakefront great room retrofit can reach $18,000 to $35,000 depending on the opening count and hardware. The lead time does not add labor cost, but it does mean your price must be locked in writing before the factory order is placed. We do that on every job. Call (754) 238-2201 for a free estimate and we will walk the house, measure the openings, and put numbers on paper for each window. No surprises on the bill, no change orders after the fact.
Trusted Brands We Service in Windermere
We are an authorized installer for more than a dozen manufacturer lines, and for Windermere lakefront work we commonly quote PGT, CGI, and Ply Gem products because their impact-rated units handle Butler Chain exposure well. We keep local relationships with regional distributors, which shortens lead times on common glass packages. On custom-ordered units, we quote the manufacturer line and warranty durations side by side on paper. You see the difference in glass, frame, and hardware before you spend a dollar. If you have an existing Andersen or Marvin window that is failing, we service and replace those lines as well, including the custom Marvin Ultimate systems that show up on higher-end estates.
We Also Serve Cities Near Windermere
TruePane handles Window Replacement in Windermere and the surrounding communities where the housing stock and code requirements shift quickly. We work in Gotha, Winter Garden, Ocoee, and Oakland regularly. Winter Garden and Ocoee homes tend to be newer tract construction with standard openings and shorter lead times. Windermere lakefront estates are a different animal entirely, which is why our crew treats your job as its own project.
Serving Windermere, FL - Our Local Coverage Area
We’re based in the Windermere 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 Replacement in Windermere
No. Florida Building Code impact requirements apply to wind-borne debris regions and the most exposed elevations, not every wall. On a lakefront home on the Butler Chain, the lake-facing elevations with the longest wind fetch carry the strictest requirements. The inland-facing sides of the same house may not require impact-rated glazing at all. That said, we often recommend impact glass entire-house on lakefront estates because the cost difference is modest relative to a full retrofit later, and the code can change your obligations when you pull a permit for substantial work. Call (754) 238-2201 and we will tell you which walls actually need it and which do not. The estimate is free.
Because Windermere custom lakefront homes were framed with non-standard openings, and the replacement units must be custom-ordered to impact specs. A Winter Garden tract home built in 2015 has standard 36×60 openings and the right insert is likely sitting in a distributor’s warehouse. A 1998 Butler Chain estate with a 144-inch pocket slider framed to no common dimension requires a factory order. That is four to eight weeks, sometimes longer for high-end lines like Marvin or PGT’s largest impact units. We cannot shorten the factory. We can lock the price before the order goes in so the wait does not change your bill.
Sometimes, but not as often as homeowners hope. If the frame is square, the glazing channel is intact, and the original glass is not impact-rated, a glass-only retrofit can work if it meets current code for that elevation. But on many late-1990s Windermere windows, the frame itself is oxidized, the weep system is clogged, and the rough opening has shifted. Replacing glass in a failed frame just puts a good unit in a bad hole. We will tell you honestly whether a glass-only path makes sense. On lake-facing elevations with wind fetch, it often does not, and the safer long-term fix is a full replacement. Call (754) 238-2201 for a straight answer and a written quote either way.
For a south-facing lake view in Orange County, you want a low U-factor for the insulating value, usually 0.30 or lower on the whole unit, and an SHGC around 0.25 or lower so the glass rejects solar heat without killing the view. On lake-facing glass where you still want to watch the water, low-E coatings and argon fills give you that balance. The exact spec depends on your roofline, overhang depth, and how much glass faces the water. We run the numbers per opening and show you the manufacturer’s published U-factor and SHGC for each option on paper. No guesswork. Call (754) 238-2201 and we will spec it out.
You cannot avoid re-framing if the opening is actually out of square; you can only avoid paying for it twice. We measure before we order, re-square the rough opening during install, and the re-framing cost is included in the written quote before the factory order is placed. What we recently encountered on a lakefront estate off Main Street was a delaminating pocket slider framed to a non-standard 1998 dimension. The framing had to be re-squared and re-flashed with new jamb extensions, and because the unit was custom, the lead time was six weeks. But the price was locked in writing before the purchase order went to the factory. That is the only way to buy this kind of work in Windermere: fixed price, written warranty registrations, and a crew that will be here next year if something shifts. Call (754) 238-2201 for your free estimate and we will put it all on paper.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Windermere and the Butler Chain lakefront communities with The Keystone Standard on every install.
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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