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 Clewiston
Window replacement in Clewiston runs $650 to $1,900 per opening for a standard impact-rated double-hung, installed, and a full house of ten to twelve openings typically lands between $9,500 and $22,000 depending on frame condition and glass package. We plan every job around the Florida Building Code wind-load requirements that apply here in Hendry County, because a window that fails a wind mitigation inspection costs you twice: once in the replacement, and again when your insurer won’t write the premium you were counting on. Our crews work Clewiston every week, from the U.S. Sugar era homes off Avenida del Sur to the newer subdivisions out toward Harlem. Call (954) 280-4413 and Dale or one of our Clewiston schedulers will give you a straight hour-by-hour answer on when a crew can be at your door.
Why TruePane Windows & Doors Is Clewiston’s Preferred Window Replacement Company
Clewiston builders and homeowners call us because we’re the shop that plans for cane ash season, codes in Florida Building Code wind-load compliance on paper, and registers both manufacturer warranty layers in writing before the truck pulls out of the driveway. We’ve spent more than years serving communities across South Florida, and we hire local crews who know that a home backing up to the levees off County Road 835 needs different flashing than a house on the north side of town near the water treatment plant.
Dale Kessler started TruePane Windows & Doors in 2008 because he was tired of seeing cheap installs leave homeowners with voided warranties and fogged glass three seasons in. The rule he kept on the whiteboard still governs every job we quote: if the pane is not true, the job is not done. Clewiston customers get the same background-checked, uniformed crews on every visit, and a live person answers the phone 24 hours a day, seven days a week. Not a voicemail tree. Not a callback form. A person.
When you call for Window Replacement in Clewiston, you’ll get what we call a square deal: upfront pricing in writing, no surprise line items on the bill, and a Done Right Promise that covers workmanship with no paperwork fights. We measure every opening twice, quote manufacturer lines side by side on paper, and register both warranty layers before the truck leaves your driveway.
Our Window Replacement Services in Clewiston
Impact-Rated Window Replacement (FBC-Compliant)
Clewiston sits in a hurricane-prone zone, and your replacement windows must meet current Florida Building Code wind-load and impact ratings to pass a wind mitigation inspection and keep your insurance policy valid. We install impact-rated systems from PGT, CGI, Andersen, and ES Windows that are engineered for the design pressure numbers this area requires. A proper impact-rated window in Clewiston means laminated glass, reinforced frames, and anchors that are tested as a system, not just a pane of thick glass in an old aluminum track.

Full Frame Replacement
On Clewiston’s stock of 1950s through 1980s concrete block homes, original aluminum windows are typically set directly into the block with no flashing and no moisture barrier worth the name. Full frame replacement removes the old window down to the rough opening so we can install new flashing tape, correct the rough opening if the block has settled, and seal the perimeter properly before the cane ash returns in October. This is the right call on any house where the old frames show pitting or the sills have started to rot. Expect $1,100 to $1,900 per opening for a full frame impact-rated replacement in Clewiston, including disposal of the old unit.

Insert Window Replacement
If the existing frames are square, sound, and pitting-free, an insert replacement drops a new double-hung or casement inside the old frame at lower cost: typically $650 to $1,150 per opening in Clewiston. The tradeoff is that inserts leave the existing frame and flashing in place, so on a 1960s worker home with cane ash damage at the sills, full frame replacement is usually the more honest long-term answer. We’ll tell you which one your house actually needs, and quote both side by side on paper so you can see the difference.

Energy-Efficient Upgrade
Clewiston’s humidity is relentless, and it’s amplified by Lake Okeechobee. Single-pane aluminum jalousies from the 1970s admit heat, humidity, and the fine particulate that rides in on the east wind during harvest season. An energy-efficient upgrade to low-E insulated glass in a properly flashed and sealed frame cuts your cooling load measurably, and we can quote you specific low-E packages from Andersen and ES Windows that perform well in this climate.

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.
Trusted Brands We Service in Clewiston
We’re an authorized installer for more than a dozen manufacturer lines, including Andersen, PGT, CGI, Marvin, and ES Windows, and most Clewiston jobs run on the brands that hold up best here: ES Windows for heavy-impact coastal-rated systems, Andersen for the double-hung lines homeowners know by name, and PGT for FBC-compliant impact windows at a price that fits a concrete block ranch. We do not push one brand. We quote manufacturer lines side by side on paper so you see exactly what you’re buying, and we register both warranty layers in writing before the truck leaves the driveway.
Common Window Replacement Problems We See in Clewiston Homes
- Cane ash packed into sill weep holes. Every harvest season from roughly October to April, field burning sends fine cane ash over Clewiston. The ash packs into weep channels, blocks drainage, and holds standing water against the aluminum frame until the metal pits and the seal fails. We clear and reseal weep channels as a standard step here that most Florida window crews never encounter.
- Original single-pane jalousie windows that fail wind-load requirements. The jalousies on 1960s and 1970s U.S. Sugar worker housing were never rated for current Florida Building Code wind loads. A home with original jalousies will not pass a wind mitigation inspection, which means your insurance premium stays high or the policy gets non-renewed.
- Corrosion from Lake Okeechobee humidity. Clewiston sits directly on the southern shore of the lake, and the humidity it generates eats aluminum frames and door hardware faster than cities farther from big water. Frames that look fine from the street often show deep pitting at the sills once the old window comes out.
- Low-bid replacements missing required impact glazing. We’ve seen Clewiston homes where a previous contractor installed “impact-rated” windows that were actually standard single-pane units with storm film, or impact glass set into frames without the required anchors. The permit gets rejected, the insurance claim gets denied, and the homeowner pays twice.
Pricing for Window Replacement in Clewiston, FL
A standard impact-rated double-hung installed in Clewiston runs $650 to $1,900 per opening depending on whether it’s an insert or full frame replacement, the glass package, and the brand. Most full-frame jobs on the 1950s-1980s concrete block homes we see off Avenida del Sur run at the higher end of that range because the old aluminum frames need full removal, new flashing, and often repairs to the rough opening. A whole-house replacement of ten to twelve windows in Clewiston typically lands between $9,500 and $22,000. A full-frame energy-efficient upgrade with low-E insulated glass and impact-rated glazing on a worker home runs $1,200 to $1,900 per opening. Every quote includes line-item pricing in writing, and everything we quote is fixed before we start. Call (954) 280-4413 to schedule a free estimate, and we’ll quote your Clewiston house specific.
We Also Serve Cities Near Clewiston
TruePane’s crews work Lake Harbor, South Bay, Belle Glade, and Pahokee on the same schedule as Clewiston, with the same impact-rated lines and the same Done Right Promise on every install. If you’re outside city limits near the Glades or off State Road 80, call and ask for Window Replacement in Clewiston - we’ll confirm your address and get a crew to you straight. Call (954) 280-4413.
Serving Clewiston, FL - Our Local Coverage Area
We’re based in the Clewiston 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 Clewiston
Replacement windows in Clewiston must meet current Florida Building Code wind-load design pressures for this specific area of Hendry County, which generally falls into the 150 to 170 mph wind zone, and impact-rated glazing or storm-panel-ready frames are required for wind mitigation credit. A properly permitted job includes a design pressure calculation, product approval numbers, and an inspection sign-off. A cheap quote that skips the design pressure calc or the product approval is not a compliant quote. Call (954) 280-4413 and we’ll walk you through the exact numbers for your address.
Yes, and it does so every harvest season in Clewiston. Fine cane ash from October through April field burns packs into sill weep holes, blocks drainage, and traps standing water against aluminum frames, which accelerates corrosion and breaks the seal on insulated glass. We clear and reseal weep channels on almost every newer home we touch in Clewiston, and we add it as a standard step on all our window replacements in this city. A crew from out of the area typically doesn’t even look for it.
In most cases, yes, because impact-rated windows or storm-panel-ready frames are the primary wind mitigation credit your insurer looks for on a Clewiston home, and a signed wind mitigation inspection after a compliant install can reduce the premium materially. The key is documentation: the permit, the product approval numbers, the design pressure calculation, and the final inspection must all be in writing and registered. We register all of it, including both manufacturer warranty layers, before the truck leaves the driveway.
Condensation between the panes means the insulating glass seal has failed, and the argon or krypton gas between the glass has vented out, so the unit can no longer insulate or resist humidity. In Clewiston’s humidity, seal failure is accelerated by cane ash corrosion at the frame and by poor flashing that traps moisture at the sill. A failed seal is a warranty issue on a new properly registered window; call (954) 280-4413 and we’ll check the registration and get it handled under the manufacturer’s terms.
Full frame replacement removes the old window down to the rough opening so we can install new flashing, correct any settled block, and seal the perimeter, which is what most 1970s concrete block homes in Clewiston need after decades of cane ash and lake humidity. Insert replacement drops a new window into the existing frame at lower cost, $650 to $1,150 per opening versus $1,100 to $1,900 for full frame, but keeps the old flashing and any hidden sill damage. We quote both side by side so you see the honest recommendation for your specific house. Call (954) 280-4413 for a free estimate on your Clewiston home.
How the Work Gets Done Right in Clewiston
We plan every Clewiston window replacement around two facts of life here: harvest season and the wind zone. On a 1960s U.S. Sugar worker concrete block home off Avenida del Sur, our crew found cane ash packed into the sill weep holes of original single-pane aluminum sliders, holding water against the frame and causing deep pitting. We cleared and resealed the weep channels, installed impact-rated double-hungs with low-E glass, and added flashing tape over the jambs before the next harvest burn. That’s the Clewiston version of done right: the opening is sealed against the ash, the window is rated for the wind load, and the warranty layers are registered in writing.
The Truth about Cane Ash Season. Clewiston sits at the center of Florida’s sugarcane belt, and the annual harvest burns from roughly October through April blanket the town in fine cane ash that locals call black snow. It works into window tracks, degrades weatherstripping, and accelerates aluminum frame corrosion in a way you won’t see in coastal cities like West Palm Beach or Fort Myers. No coastal South Florida city faces this specific seasonal assault on windows and doors. If your replacement crew doesn’t know to clear and seal weep channels, you’ll be replacing the same window again in five years. We do know, because we work Clewiston every week, not once a season.
Why a Cheap Quote Is a False Economy Here. A low-bid window replacement in Clewiston is often low because it omits the impact-rated glazing, the product approval numbers, the design pressure calculation, or the permit. That window may look like it fits. It will not pass a wind mitigation inspection. When a storm tears through Hendry County and your insurer asks for the paperwork, a non-compliant install turns into a denied claim and a second out-of-pocket replacement. A compliant quote from us includes the permit, the product approval documentation, the DP rating specific to your address, and the wind mitigation report after the final inspection. That’s not an upcharge. It’s the minimum standard for a window that actually protects a Clewiston home.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Clewiston with impact-rated window replacement and the Done Right Promise on every job.
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.



Before
After
Before
After
Before
After