Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
CGI
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After
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AfterFast, Reliable Window Installation Across Sanibel
Window installation in Sanibel almost always means impact-rated units built to Florida Building Code High Velocity Hurricane Zone specifications. A typical impact window in Sanibel runs $800 to $1,500 per unit installed, with whole-home packages often ranging from $8,000 to $25,000 or more depending on opening count and wind-load requirements. If you’re rebuilding after Hurricane Ian or replacing pre-Ian jalousies in an elevated cottage, call TruePane Windows & Doors at (239) 323-5522 for a free in-home measure and a written, line-by-line quote.
We work on Sanibel year-round. Our crews know the causeway logistics, the code inspection rhythm, and the salt-air realities of this island better than any mainland-based outfit that occasionally crosses the bridge. Dale Kessler, our founder and a second-generation glazier, keeps one rule on the whiteboard: if the pane is not true, the job is not done. That standard applies to every rough opening we set a frame into on this island.
Why TruePane Windows & Doors Is Sanibel’s Preferred Window Installation Company
Sanibel homeowners have been calling us since before Ian, and they call us after Ian because we understand what this island’s building department actually checks. We know the inspectors expect to see Miami-Dade NOA documentation for every one of the units you’re installing, not a bundle of paperwork from a mainland wind zone that doesn’t apply. We know the difference between the wind-load map for a stilt home on East Gulf Drive facing open Gulf exposure and a flat-grade house tucked back off Periwinkle Way behind the tree line near the Bailey Tract. That distinction changes the design pressure you’re required to meet, and it changes the price.
Our team on Sanibel works under Window Installation standards TruePane holds across Southwest Florida. We’re not the cheapest bid in the room, and we don’t try to be. What we offer is the last call a homeowner needs to make: both manufacturer warranty layers registered in writing before the truck leaves your driveway, a 90-Day Done Right Promise on every job, and a company that has served local communities for over 42 years. That’s the Keystone Standard. It’s not a marketing line. It’s the way Dale built this business in 2008, and it’s the way our uniformed, background-checked technicians work today.
A live person answers our phone 24 hours a day, seven days a week. When you call about a Sanibel job, you talk to a person who can answer questions about HVHZ compliance, causeway delivery schedules, and what an actual quote looks like. Not a voicemail tree. Not a regional call center.
Our Window Installation Services in Sanibel
Sanibel’s housing stock has shifted dramatically since September 2022. Pre-Ian, the island was dominated by 1950s through 1980s elevated beach cottages and stilt homes, many still fitted with jalousie windows or single-pane sliders that long predated impact-glazing requirements. Post-Ian reconstruction has replaced those units en masse with newly permitted elevated structures. That means installers here are routinely working on fresh rough openings in brand-new stilt framing rather than retrofitting existing walls. The work is new-construction-grade, even when it looks like a replacement.
Single & Double Hung Windows
Single and double hung impact windows are standard work for us on Sanibel’s rebuilding homes off Sanibel-Captiva Road and in the East End neighborhoods. A typical impact-rated single hung in Sanibel runs $900 to $1,800 per unit installed, depending on size, floor height, and design pressure rating. Double hung units give you ventilation from both sashes, which matters when the salt air settles in and you want cross-flow without opening a slider to the Gulf wind.
Horizontal Roller Windows
Horizontal roller windows remain everywhere in Sanibel’s older coastal stock, and we install plenty of them in post-Ian rebuilds as well. On this island, these units need marine-grade anodized or powder-coated aluminum frames. Stock aluminum without that heavy coating pits within a few years from three-sided salt spray. We quote units with the right coating and 316 stainless steel hardware from the start, so you’re not paying for a do-over in five years.
3-Panel Sliding (3-Lite Roller) Windows
Three-panel sliders are popular on Sanibel’s Gulf-facing elevations, where homeowners want a wide opening to capture the breeze off the water. These are heavy, laminated-glass units. A 3-lite roller in Sanibel typically runs $2,500 to $5,000 installed for large or custom openings. Delivery matters here: a wide-load flatbed carrying these slabs has to cross the Sanibel Causeway, which is a constraint mainland jobs simply don’t have. We pre-schedule those deliveries carefully, usually three weeks ahead, so the units arrive before any concrete pour or framing deadline.
Casement Windows
Casement windows are a strong choice for Sanibel’s wind zone. They seal tight against the frame when closed, and the crank operation lets you catch cross-breezes without sliding tracks that collect salt and sand. We recently completed a full window package for a newly elevated stilt home on East Gulf Drive, where the rough openings were cut into fresh pressure-treated framing according to the latest HVHZ wind-load maps. Our crew installed PGT WinGuard impact-rated casement and horizontal roller windows with Miami-Dade NOA approvals and large-missile ratings, using 316 stainless steel fasteners and butyl flashing at every flange. That’s the level of detail Sanibel code demands, and it’s what we bring to every opening.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Sanibel
TruePane is an authorized installer for more than a dozen manufacturer lines, including Andersen, Pella, Marvin, Milgard, PGT, and CGI. For Sanibel specifically, we quote a lot of PGT WinGuard and CGI for Gulf-facing exposure, and ViewLux for homeowners who want European-style tilt-and-turn hardware in a marine-grade finish. We carry the documentation to match: Miami-Dade NOA approvals, Florida Product Approvals, and design pressure ratings that never exceed +100/-100 PSF because no residential opening in this wind zone should be specced above that. When you call us for Sanibel window work, we bring side-by-side quotes on paper so you can see exactly what each line costs and what rating it carries.
Common Window Installation Problems We See in Sanibel Homes
- Salt-pitted aluminum frames. Frames without heavy-duty anodizing or marine powder coat oxidize and seize within a few years on this island. Sanibel’s three-sided salt spray means standard “coastal” finishes are not enough. We specify marine-grade finishes up front.
- Wind-driven rain at threshold and flange interfaces. When installers skip full-perimeter butyl tape or use standard fasteners instead of 316 stainless steel, water gets driven into new stilt framing during the first hurricane season. Rot follows. We flash every flange the way the HVHZ detail drawings show, and we use stainless hardware on every opening.
- Unapproved laminated glass units. If a glass unit doesn’t carry a Miami-Dade NOA or Florida Product Approval for the design pressure of a specific opening, it can shatter under large-missile impact. The warranty is void, and the home is unprotected. We document every rating and register both warranty layers before the truck leaves.
- Jalousie frames left in place. Pre-Ian cottages still have jalousie windows in some cases. These units are not impact-rated and cannot be brought to HVHZ compliance by swapping glass. The frames need full replacement, and we handle that from measure to final inspection.
Pricing for Window Installation in Sanibel, FL
Impact windows in Sanibel generally run $800 to $1,500 per window installed. Impact single-hungs land between $900 and $1,800. Large or custom openings, including 3-panel sliders, run $2,500 to $5,000. Whole-home packages typically range from $8,000 to $25,000 or more, depending on opening count, floor height above grade, and the design pressure the county requires for your specific wind zone. What moves the price most on this island is the causeway delivery coordination, the stainless steel hardware, and the marine-grade frame finish. Our quotes are written line-by-line, so you see every cost before you sign. Call (239) 323-5522 to schedule a free in-home measure.
What Window Installation Costs in Sanibel
We already laid out the per-unit numbers above, but it helps to understand what separates a $900 opening from a $1,500 opening. On Sanibel, the biggest factors are floor height and exposure. A ground-level window on a home set back behind the mangroves off Rabbit Road might meet a lower design pressure requirement than a third-floor opening facing straight down East Gulf Drive with nothing between it and open water. The latter needs a thicker laminated glass package and possibly a heavier frame profile. Frame material matters too: marine-grade anodized aluminum costs more than mainland-grade aluminum, and it should. It’s what keeps your sashes from seizing in three years.
We never quote a number over the phone without seeing the openings. What we do is measure twice, quote manufacturer lines side by side on paper, and register both warranty layers before the truck leaves. The free in-home measure is the start of that process, and it’s yours by calling (239) 323-5522.
Florida Pays You Back
There are real incentives for Sanibel homeowners doing impact window work. The My Safe Florida Home program offers matching grants up to $10,000 for qualifying wind-mitigation upgrades. Florida also exempts impact-resistant windows and doors from sales tax. On the federal side, the 25C energy credit covers 30% of product cost, up to $600 per year, on qualifying units. And after a wind-mitigation inspection (typically $75 to $150), many carriers knock around 25% off the windstorm portion of your premium when they see documented impact-rated openings. These programs have rules and income or homeowner requirements, and carriers set their own final numbers. We’ll walk through what documentation you need so you don’t leave money on the table.
We Also Serve Cities Near Sanibel
TruePane crews work across the Sanibel Causeway and into Fort Myers Beach, Cape Coral, Estero, and Fort Myers. Lee County’s coastal wind zones and mainland wind zones have different code requirements, and we carry the right documentation for each. If you’re in a neighboring community and want the same Keystone Standard we bring to Sanibel, call the same number: (239) 323-5522.
Serving Sanibel, FL - Our Local Coverage Area
We’re based in the Sanibel 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 Installation in Sanibel
Sanibel sits in Florida’s High Velocity Hurricane Zone, which means every replacement window must carry a Miami-Dade NOA or Florida Product Approval matching the design pressure for the specific opening, and those pressures never exceed +100/-100 PSF on residential work. Your exact requirement depends on floor height, exposure, and the wind-load map for your address. We pull that map for every quote, and we won’t install a unit that doesn’t match it. Call (239) 323-5522 for an exact written quote for your openings.
After a wind-mitigation inspection, documented impact-rated windows typically reduce the windstorm portion of a Sanibel homeowner’s premium by around 25%, though the carrier sets the final figure. The key word is documented: you need the NOA or Florida Product Approval paperwork, along with the installation record showing the units were set per HVHZ details. We register both warranty layers and provide the documentation package you need to take to your insurer.
Jalousie frames cannot be brought to HVHZ compliance by replacing the glass. The frames themselves are not rated for any design pressure, and they were never engineered for impact glazing. Full replacement is required. We handle that from measure to final inspection, including the permit documentation for Sanibel’s building department.
Sanibel is accessible only via the single Sanibel Causeway, which means oversized impact-glass units and patio door slabs require wide-load flat-bed deliveries that are carefully pre-scheduled. Mainland jobs don’t have this constraint. The line item covers the coordination, the wide-load logistics, and the scheduling discipline required to get your units to the island before framing or pour deadlines. It’s a real cost of working on this island, and we show it to you on paper rather than burying it.
Yes, they do. The Low-E coating reflects solar heat before it enters the home, which matters on an island where the Gulf sun hits glass all afternoon. Impact-rated laminated glass units with Low-E and argon gas perform noticeably better than the single-pane sliders and jalousies they replace. The salt air doesn’t reduce that performance; what it does is attack the frames and hardware, which is why marine-grade finishes and stainless steel matter just as much as the glass package.
Call TruePane for Window Installation in Sanibel
Impact windows on this island are not a commodity purchase. They have to survive the next storm, pass Sanibel’s inspection on the first try, and keep the salt air out for decades. That standard starts with the right documentation and ends with true panes in true frames. Call TruePane Windows & Doors at (239) 323-5522 for a free in-home measure and a written quote that shows every line. A live person answers, and we’ll be there when we say.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Sanibel and Southwest Florida.
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.