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 St. Leo
Window replacement in St. Leo, FL typically runs $650-$1,850 per opening for full-frame work and $450-$1,100 for insert replacements, with most jobs completed in a single visit once materials arrive. St. Leo sits on karst limestone, which means our technicians check sill level before quoting anything. Call (754) 238-2201 for a free estimate from TruePane Windows & Doors, founded by second-generation glazier Dale Kessler and serving local communities since 2008.
If you live near Saint Leo University or off County Road 52, you already know the terrain here isn’t flat Florida. It rolls. That rolling ground sits atop one of the most sinkhole-active counties in the country, and it changes how windows behave over time. A window that binds in July or a door that stops latching cleanly isn’t always a failed unit. Around here, it’s often the first sign the ground under the house has shifted a fraction of an inch. That’s why our crew doesn’t just measure openings twice and order glass. We check level first. If the pane isn’t true, the job isn’t done, and in St. Leo that rule matters more than most places.
Why TruePane Windows & Doors Is St. Leo’s Preferred Window Replacement Company
We’ve worked on homes throughout the St. Leo area long enough to know what the ground does to a frame. Dale Kessler founded TruePane in 2008 on a simple principle: out-of-true installs and voided warranties are problems worth fixing permanently. That principle drives every full-frame replacement, insert, and energy upgrade we do in this community.
Our technicians are background-checked, uniformed, and trained in-house from apprentice to journeyman. We hire local people who understand Pasco County building codes and the wind-borne debris requirements that apply even this far inland. When a St. Leo homeowner calls about a fogged seal or a sash that won’t stay up, we send someone who knows the difference between a failed unit and a racked opening. That diagnostic step is the difference between a repair that lasts and a replacement that fails again within a year.
Every job carries the Done Right Promise and The Keystone Standard: both manufacturer warranty layers registered in writing, durations stated, before the truck leaves your driveway. You’ll see the paperwork. No fine print that covers neither. A live person answers our phone 24 hours a day, seven days a week, not a voicemail tree. Call (754) 238-2201 and a human picks up.
We’re an authorized installer for more than a dozen manufacturer lines, including, PGT, and CGI. We quote manufacturer lines side by side on paper so you can see exactly what you’re buying and what each warranty actually covers. Most St. Leo jobs are completed in a single visit.
Our Window Replacement Services in St. Leo
Here’s what we actually do in St. Leo homes, and why each service matters on this specific terrain. For the full picture on our approach, see our Window Replacement team’s service hub.
Full Frame Replacement
Full frame replacement means the old window comes out down to the rough opening. In St. Leo, that’s when we find out what’s really going on behind the trim. Karst micro-shifts rack framing over time, and we’ve pulled windows on shaded north-facing elevations near Lake Jovita only to find sill rot hidden behind the nailing flange, wood that never fully dried between Florida’s rain events. Full frame work lets us square the opening, replace rotted lumber, install new flashing tape, and set a frame that will actually stay true. A typical full-frame replacement in St. Leo runs $650-$1,850 per opening, depending on size, material, and whether impact-rated glazing is required.

Insert Window Replacement
Inserts fit a new window unit inside the existing frame. They’re the right call when the rough opening is still square and the surrounding wood is sound. But here’s the St. Leo caveat: if the frame has settled even slightly out of square, a new insert will bind, crack, or fog within months. We check level on every opening before recommending an insert. When the frame checks out, inserts run $450-$1,100 per opening and preserve your existing interior and exterior trim.

Storm Window Replacement
St. Leo sits inland, but Pasco County still enforces wind-borne debris provisions in the Florida Building Code. Afternoon convective storms funnel over the elevated lake-region slopes and drive rain sideways against windows in ways flat-terrain homes never experience. A storm window replacement here isn’t just about protecting original single-pane sashes, it’s about keeping water out of the wall cavity when the next summer storm hits. We quote impact-rated lines like CGI and PGT side by side with standard glazing so you can decide with real numbers on paper.

Energy-Efficient Upgrade
Year-round humidity in St. Leo means window seals work harder here than they do in drier inland climates. If you’re seeing condensation between panes or feeling heat radiate through glass on summer afternoons, an energy-efficient upgrade to low-E, argon-filled double or triple glazing typically cuts cooling load noticeably in mid-century ranch homes with original aluminum frames. Upgrades to Energy Star-rated units generally run $550-$1,400 per opening in this market, with the higher end reflecting impact-rated low-E combinations.

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 St. Leo
We’re factory-authorized to install and service more than a dozen manufacturer lines, and we stock common parts for St. Leo customers so turnaround stays fast. If your home already has Andersen, Pella, or Marvin windows, we can match profiles and hardware without waiting weeks for special-order components. We also install impact-rated lines from CGI, PGT, and ES Windows, plus energy-focused systems from ECO Window Systems and CWS. When we quote, we put the manufacturer lines side by side on paper with their warranty durations written out. You decide with facts, not a sales pitch.
Common Window Replacement Problems We See in St. Leo Homes
- Racked rough openings from karst micro-shifts: A window that won’t latch or a sash that binds isn’t always a bad unit. In St. Leo, it’s frequently the frame settling out of square. A new insert installed into a racked opening fails within months. We square the opening or recommend full-frame replacement before ordering glass.
- Hidden rot at north-facing sills: Shaded elevations near Lake Jovita and the rolling hills around Saint Leo University stay damp after every rain. Rot hides behind the nailing flange and only appears when the old window comes out. Full-frame replacement gives us the chance to cut out the rot and rebuild the opening properly.
- Failed seals from humidity and thermal cycling: Fogged glass between panes means the seal has failed. Florida’s humidity cycle stresses every seal, and St. Leo’s convective storm pattern accelerates it on east and south elevations. We check whether the frame is square before recommending glass-only replacement, because a racked frame will kill a new seal fast.
- Water intrusion at the head from driven rain: Impact-rated glazing installed over old or missing flashing tape leaks at the top when Pasco storms drive rain sideways against the slope. We verify flashing before any install and wrap heads with new tape on every full-frame job.
Pricing for Window Replacement in St. Leo, FL
Residential window replacement in St. Leo runs $450-$1,850 per opening depending on the type of work. Here’s the breakdown:
- Insert replacement: $450-$1,100 per window when the existing frame is square and sound
- Full-frame replacement: $650-$1,850 per window including removal, frame correction, flashing, and trim
- Energy-efficient low-E upgrade: $550-$1,400 per window depending on glazing package
- Impact-rated glazing (Pasco County wind-borne debris compliance): add $150-$450 per window over standard glazing
What moves the number: window size, material choice (vinyl, aluminum, wood-clad), impact-rating requirements, and what we find when the old unit comes out. On older St. Leo homes, we write repair allowances into the contract up front so a rotted header or racked framing doesn’t become a surprise change order. Any additional work gets priced and approved in writing before we touch it. Call (754) 238-2201 for a free estimate. We’ll come out, check level on your sills, and put real numbers on paper.
We Also Serve Cities Near St. Leo
Our crews regularly serve Window Replacement in St. Leo and the surrounding communities, including Anna Maria, Acacia Villas, Alafaya, and Altamonte Springs. If you’re in any of these areas and dealing with a fogged seal, a binding sash, or a door that won’t latch, call (754) 238-2201. We’ll send a background-checked technician who measures every opening twice.
Serving St. Leo, FL - Our Local Coverage Area
We’re based in the St. Leo 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 St. Leo
In St. Leo, a window that suddenly sticks or won’t latch is often the first visible symptom of subsurface karst dissolution, not a failed unit. Pasco County is one of the most sinkhole-active counties in the U.S., and even minor ground movement racks frames out of square over time. A new insert installed into a racked opening will bind, crack, or fog within months. Before we quote any replacement, we check level on the sill. If the frame has settled, we square it or recommend full-frame work. Call (754) 238-2201 and we’ll check it before you spend a dollar.
The three most common surprises in older St. Leo homes are rotted sill lumber behind the nailing flange (especially on shaded north-facing elevations), racked rough openings from settlement, and outdated or damaged flashing tape that’s been leaking into the wall cavity for years. We handle these with inspection first and written allowances in the contract. Any additional work gets priced and approved in writing before we proceed, never after. Call (754) 238-2201 for a free estimate and we’ll walk you through what your specific home is likely to need.
Yes. St. Leo falls under Florida Building Code wind-borne debris requirements for Pasco County, so replacing windows typically requires a permit and compliant glazing in designated wind zones. We pull permits on every job that requires one, and we’ll tell you during the estimate whether your openings need impact-rated glass or if standard glazing with the right frame meets code. We’ve never failed an inspection in St. Leo. Call (754) 238-2201 and we’ll verify your specific requirements.
If the frame is still square and the sash is in good condition, glass-only replacement is often the right fix for fogged seals, and it typically runs $250-$500 per window in St. Leo. The catch: if the frame has racked from settlement, a new sealed unit will fail again fast. We check level before recommending glass-only work. Call (754) 238-2201 and we’ll tell you honestly whether the glass alone solves it or the frame needs attention too.
St. Leo’s elevated, rolling lake-region topography funnels strong afternoon storms that drive rain sideways against windows, while year-round humidity keeps shaded sills damp. If your existing frame is square and flashing is intact, an insert replacement handles both conditions fine. If the frame has settled out of square or hidden rot has compromised the nailing flange, only full-frame replacement gets the flashing and structure right. We check level and probe for rot before recommending either option. Call (754) 238-2201 for a free on-site assessment.
Call TruePane Windows & Doors for St. Leo Window Replacement
We were called to a mid-century ranch on a ridge near Saint Leo University where a double-hung wouldn’t stay up and the jamb was visibly out of square. Our tech checked level on the sill and found a 3/8-inch settlement dip. We wrote a repair allowance into the contract, replaced the racked opening with a fusion-welded Andersen frame and new flashing tape, and documented the structural flag for the homeowner’s insurance file. That’s how we work in St. Leo, and that’s why homeowners here keep our number.
Dale Kessler’s rule hasn’t changed since day one: if the pane is not true, the job is not done. Call (754) 238-2201 today to schedule your free estimate. A live person answers, 24 hours a day, seven days a week. We’ll be there when we say, we’ll measure every opening twice, and we’ll put your warranty in writing before the truck leaves the driveway.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving St. Leo and surrounding communities.
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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