Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Window Installation Across Dunedin
Window installation in Dunedin runs $650-$2,400 per opening for most residential jobs, with jalousie-to-impact conversions starting around $1,100 because of the structural work involved. Most projects take one day per window once permitting clears. If you’re calling from anywhere in Dunedin, a live person answers at (954) 280-4413 and can walk you through what your specific house will likely need.
We know this city’s housing stock the way only a company that has opened hundreds of its walls can. Dunedin is not Pinellas Park or Largo. The bungalows off Bayshore Boulevard, the cottages near the Pinellas Trail, the mid-century ranches around Michigan Avenue: each generation of construction has its own failure points, and we have seen most of them. If you own a pre-1960 home here, the window job will almost certainly involve more than swapping glass. We plan for that. You should too.
Why TruePane Windows & Doors Is Dunedin’s Preferred Window Installation Company
Dale Kessler founded TruePane in 2008 with a rule that still governs every install: if the pane is not true, the job is not done. That is not a slogan. It is the standard our crews use on the first visit and on any callback, and it is why Dunedin homeowners who have been burned by franchise window outfits call us second.
Our Dunedin customers tend to say the same three things: the tech showed up when he said, the quote on paper matched the bill, and the warranty was registered before the truck left the driveway. We register both manufacturer warranty layers in writing under The Keystone Standard, with durations stated, on every single job. No paperwork fights. No arguing. The Done Right Promise backs the workmanship.
We are an authorized installer for more than a dozen manufacturer lines, including, PGT, and CGI. That matters in Dunedin because the right frame spec changes street by street. A waterfront home on the Dunedin Causeway corridor needs marine-grade finishes. A 1920s Craftsman near downtown needs a window that respects the original sightlines. We quote manufacturer lines side by side on paper so you see exactly what you are buying before you sign.
Dispatch and scheduling are coordinated from our South Florida office, but the crews serving Dunedin work these streets every week. We hire local, train apprentices into journeymen, and plan to be answering the phone here in thirty years. That is not a franchise playbook talking. That is Dale’s rule, still on the whiteboard.
Our Window Installation Services in Dunedin
Casement Windows
Casement windows are the workhorse replacement in Dunedin’s older bungalows, particularly where original wood-framed casements have failed flashing and salt-driven rain has rotted the rough sill. A properly set casement seals tighter against wind than a slider or double hung, which matters when design speeds near 130 mph off St. Joseph Sound are the permitting baseline. We set fusion-welded frames, re-flash the rough opening with butyl tape, and sister undersized headers where the original framing cannot carry modern insulated glass. Typical casement installs in Dunedin run $900-$2,200 per unit depending on size and impact rating.

Sliding Windows
Original aluminum sliders from the 1960s and 1970s are some of the most common windows we pull in Dunedin, especially in the ranches off Belcher Road and the streets north of Main. Many were set without proper flashing, and decades of salt air have pitted the tracks until the sash binds. Modern impact-rated sliders with marine-grade frames solve both problems, but the rough opening often needs sill repair before the new unit can be set true. Expect $800-$1,800 per opening for a quality slider replacement in Dunedin.

Awning Windows
Awning windows work particularly well in Dunedin’s low-slung bungalows, where they catch Gulf breezes while shedding rain even when left open. We install them often above kitchens and in bathrooms where a full casement swing would crowd a walkway. Awning installs run $700-$1,600 per unit here, and the same wind-load and flashing requirements apply as with any coastal opening.

Single & Double Hung
For Dunedin homeowners who want to preserve a traditional street-facing character, double hung windows in wood or fiberglass keep the vertical proportions of the original 1920s-1950s openings. Single hung units cost less and serve well on secondary elevations. Both need proper header verification in older homes, and both run $650-$1,500 per opening in Dunedin depending on material and impact rating.

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 Dunedin
We carry and install Andersen, ES Windows, among more than a dozen authorized manufacturer lines. What that means for a Dunedin customer is simple: we stock local parts for these lines, we can walk you through the differences in person, and we quote them side by side on paper so the decision is yours, not ours. Salt-air performance, impact rating, thermal efficiency, sightlines: each line has strengths, and the right answer changes by street. On the Dunedin Causeway corridor, we lean toward marine-grade ES Windows frames. In the historic district, Andersen wood-clad keeps the character. The Keystone Standard applies to every one of them.
Common Window Installation Problems We See in Dunedin Homes
- Jalousie-to-impact conversions with undersized headers. Original jalousie units are light. Modern impact-rated insulated glass weighs three to four times as much. In older bungalows, the load-bearing header often is not sized for that load, and the new unit deflects, cracks drywall, or sags. We check header sizing before quoting, and we write the structural fix into the contract.
- Non-marine-grade aluminum frames pitting within two years. Open-water salt air off St. Joseph Sound is relentless along the Dunedin Causeway corridor and the waterfront streets. Standard aluminum frames and door hardware oxidize and pit far faster than even 10 miles inland. Marine-grade or anodized finishes are a practical necessity here, not an upgrade.
- Failed flashing behind original wood-framed casements. Salt-driven rain works into the wall cavity long before interior damage appears. By the time a homeowner sees a soft sill, the rough opening often needs rebuilt. Our inspection-first process catches this before the new window goes in, not after.
- Insurance-driven jalousie replacements on 4-point inspections. Florida insurers cancel policies over jalousie windows, and Dunedin’s housing stock is full of them. These replacements are often mandatory, but they do not have to be a headache. We handle the wind-load permitting and the structural work together, so the insurance fix and the code fix happen in one job.
Pricing for Window Installation in Dunedin, FL
Here are honest ranges for Dunedin’s market. A standard single or double hung replacement runs $650-$1,500 per opening. Casement windows run $900-$2,200. Sliding windows run $800-$1,800. Jalousie-to-impact conversions start around $1,100 per opening, and the final number depends heavily on header work and marine-grade frame specs. Bay and bow installations run $3,800-$7,500 as a complete assembly. Garden and basement windows run $800-$1,700. These figures assume a proper flashed installation with permitted work. We do not cut corners, and we do not quote a low number and then hand you a change order. Free estimates are exactly that: free, written, and line-itemed. Call (954) 280-4413 to schedule yours.
We Also Serve Cities Near Dunedin
Along with Dunedin, our crews regularly install and replace windows in Window Installation projects across Pinellas Park, Largo, Seminole, and Bay Pines. Each of those cities has its own housing stock and its own wind-load realities, but the standard does not change: true pane, registered warranty, written quote. If you are in any of those communities, Window Installation in Dunedin is the standard we bring to every opening we set.
Serving Dunedin, FL - Our Local Coverage Area
We’re based in the Dunedin 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 Dunedin
Jalousie windows fail 4-point insurance inspections because they cannot meet Florida’s wind-load codes and offer almost no impact resistance. Insurers view them as a direct liability in a hurricane zone like Pinellas County. Replacing jalousies with impact-rated units typically satisfies the inspection requirement and can unlock policy discounts. Every insurer differs, but a written installation record with the impact rating and permit number is what your agent needs. Call (954) 280-4413 and we will help you get the documentation right.
Often, yes. Original jalousie rough openings in 1920s-1960s bungalows were framed for lightweight units. Impact-rated insulated glass weighs three to four times more, and many headers cannot carry that load without deflection. We verify header sizing during the estimate, and if the framing needs sistered or replaced, we write that into the fixed quote before any work starts. This is the biggest surprise a Dunedin homeowner faces, and our inspection-first process removes it.
Salt air accelerates oxidation and pitting on standard aluminum frames and door hardware, especially along the Dunedin Causeway corridor and any street with open water exposure. This causes sash binding and premature seal failure. For these locations, specify marine-grade or anodized aluminum finishes, or move to a composite or vinyl frame line rated for coastal exposure. It costs more up front and lasts years longer. On a waterfront home, it is not optional.
Sometimes, yes. When a window replacement requires opening the rough opening to repair flashing or framing, the exposed work must meet current code. That can mean structural header upgrades, tie-down hardware, or water-resistive barrier corrections. We build allowances into the written quote for these foreseeable issues before permits go in, and any new issue gets priced and approved in writing before we proceed. You will never get a surprise change order after the fact. Call (954) 280-4413 for an estimate that accounts for this up front.
U-factor measures how well a window resists heat transfer. SHGC measures how much solar heat the glass lets through. On a Dunedin waterfront home, SHGC matters more: direct sun off the Gulf and St. Joseph Sound drives cooling costs harder than the moderate winter chill. A window with a low SHGC (0.25 or lower) blocks more of that solar gain. We quote both ratings on paper for every line we present, so you can compare real numbers instead of marketing language. Call (954) 280-4413 to talk through the options for your specific elevation.
What Opening an Older Dunedin Wall Actually Turns Up
If you own a pre-1960 home in Dunedin, here is what we know before we pull the first jalousie out: the wall is not going to be what the blueprints say it is. Outdated wiring stapled through the rough opening. Undersized headers deflecting under the weight of a modern unit. Failed flashing letting salt air eat the sill plate. And the moment the permit is pulled, Pinellas County may require code upgrades the original builder never had to meet. This is the single biggest reason a window quote moves in this city, and it is why we do not quote on pictures.
Our process starts with an inspection of the rough opening before any number is finalized. We check header sizing against the weight of the replacement unit. We look for signs of salt-driven moisture behind the original frame. We account for the wind-load permit and the code path a coastal opening triggers. Then we write the allowance into the contract, in plain language, with fixed pricing. Any surprise that appears after the wall is open gets priced and approved in writing before we touch it. No change orders slipped in. No “we discovered it so you pay whatever.”
In Dunedin’s historic bungalow belt, original jalousie windows are so prevalent that Pinellas County coastal wind-load permitting and Florida insurer 4-point inspections effectively require impact-rated replacements. That makes jalousie-to-impact conversions one of the city’s highest-volume window installation jobs, a dynamic not shared by inland neighbors like Safety Harbor. On a 1920s Craftsman bungalow off Bayshore Boulevard, our crew pulled a failing single-pane aluminum slider to find the original jalousie rough opening had never been properly flashed. Salt air off St. Joseph Sound had rotted the sill plate, and the undersized header deflected under the weight of the new Marvin impact-rated insulated glass unit. We sistered the header, rebuilt the sill with treated lumber, and flashed the opening with butyl tape before setting the fusion-welded frame, bringing the whole assembly up to current wind-load code without changing the home’s street-facing character.
That is the job most window companies in Dunedin will not do. It is the job we do every week.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Dunedin since 2008 of craft and community commitment.
Ready for a square deal on your window installation? Call (954) 280-4413 to schedule your free estimate. A live person answers, every time.
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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