Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Custom Windows & Doors Across St. Leo
St. Leo Door Installation and custom windows here are rarely a simple swap. This town is built around Saint Leo University’s historic Benedictine campus, where original steel casements sit mortared into 1880s masonry and every opening measures a little differently than the one beside it. TruePane Windows & Doors has the field experience to measure, source, and set replacements that hold up to central Florida humidity without disturbing the historic fabric of the building. If you’re dealing with fogged glass, rusted steel frames, or a door that binds in July, call (954) 280-4413 for a free estimate. We’ll send a technician who knows what he’s looking at.
Why TruePane Windows & Doors Is St. Leo’s Preferred Custom Windows & Doors Company
We’ve been doing Custom Windows & Doors work long enough to know that St. Leo is not a tract-home market. The residential streets off S.R. 52 hold a handful of mid-century ranch homes with original single-pane windows and brittle vinyl frames. The campus holds buildings from the 1880s through the 2000s, each with its own window profile, substrate, and code requirement. Our crews are background-checked, uniformed, and trained to work in occupied institutional buildings as carefully as in a private home. Dale Kessler founded TruePane in 2008 on a rule he still keeps on the whiteboard: if the pane is not true, the job is not done. That rule governs every measurement we take in St. Leo.
We answer the phone. Not a voicemail tree, not a callback form. A live person, 24 hours a day, 7 days a week. When you call about a window that won’t close or a storefront that’s been compromised, you get a real answer and a scheduled visit. We register both manufacturer warranty layers in writing before the truck leaves the driveway, because a warranty that isn’t registered doesn’t exist. And every job carries our Done Right Promise: if it’s not done right, we make it right. No paperwork fights, no arguing.
Our Custom Windows & Doors Services in St. Leo
Custom Shape Windows
St. Leo’s older campus buildings and a few custom homes on rural lots have window openings that don’t match any stock size. Arched tops, eyebrow windows, octagonal clerestory glass, and trapezoidal accent panels all show up here. We field-measure every jamb individually, then order custom-built units from manufacturers like Andersen and Marvin. The glass arrives cut to the actual opening, not a “close enough” standard size. In St. Leo, where an eighth-inch misfit on a masonry opening means a compromised seal and a water leak, custom measurement is the only honest approach.

Commercial Storefront Glazing
Storefront systems on campus-adjacent commercial buildings in St. Leo take real abuse from afternoon thunderstorms and sustained UV. We replace fogged or cracked storefront lites, rebuild aluminum framing, and install new door hardware where the original has sagged. Interior-grade flashing tape is the failure we see constantly in commercial retrofits done by crews without masonry experience. We use peel-and-stick flashing rated for masonry substrates, which keeps that Puncheon Creek humidity out of the jamb cavity.
Key Takeaways

Curtain Wall Systems
Saint Leo University’s newer academic buildings use aluminum curtain wall systems with large spans of glass. When a panel fogs or a mullion seal fails, the entire thermal performance of the wall drops. Our team handles full curtain wall reglazing, seal replacement, and panel removal without interrupting building operations. We work in phased sequences around class schedules and administrative hours because we understand that a functioning campus can’t close for construction. St. Leo’s inland ridge location means aluminum corrodes more slowly than on the Gulf coast, but the daily summer thunderstorm cycle still finds every failed gasket and weep hole.

Architectural Grilles & SDLs
The strongest match for historic character in St. Leo is a modern insulated glass unit with simulated divided lites (SDLs). The original campus windows used true divided lites with individual panes of single-strength glass, which is thermally terrible by today’s standards. Grilles and SDLs from PGT or Marvin give the same sightlines from 10 feet away while holding a low-E coating and argon fill inside. We’ve done this on abbey-side buildings where the Division of Historical Resources required glazing that matched the original profiles. The key is specifying the correct grille profile, spacer bar color, and muntin width so the window reads as historically correct from the sidewalk and performs like a modern unit.

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 an authorized installer for, PGT, CGI, and ES Windows, and we work on most other major lines as well, including St. Leo Cgi service. For St. Leo customers that means we carry replacement hardware, balances, and weatherstripping for the common brands and can source less common parts from our supplier network within days. We service CWS, ES Windows, and ECO Window Systems products regularly. We quote manufacturer lines side by side on paper so you can see what each brand actually costs, not what a salesperson prefers to sell.
Common Custom Windows & Doors Problems We See in St. Leo Homes
- UV-degraded vinyl frames on mid-century ranch homes: Florida sun breaks down vinyl’s plasticizers within 15 to 20 years. The sashes get brittle, corner welds crack, and double-hung balances snap under load. We replace these with thermally broken aluminum or fiberglass units that handle central Florida UV without embrittlement.
- Corroded original steel casements on masonry campus buildings: Moisture wicks into the frame at the mortar joint, rusting the steel where you can’t see it until the sash seizes. Full replacement requires field-measured custom units with hot-dip galvanized anchors, not standard screws driven into old mortar.
- Fogged insulated glass from failed seals: Daily summer humidity and afternoon thunderstorms mean a seal failure shows up fast in St. Leo, not years later. When you can see condensation between the panes, the desiccant in the spacer has maxed out and the glass unit needs to be replaced, not just re-sealed.
- Improper flashing on masonry retrofits: Crews without masonry experience use interior-grade flashing tape that peels off concrete block within one wet season. Afternoon thunderstorms drive rain into the jamb, rot wood bucks, and stain interior drywall. We cut out the bad work and re-flash with substrate-rated materials.
Pricing for Custom Windows & Doors in St. Leo, FL
Custom work is priced by the opening, not by the square foot. In St. Leo, a standard custom-shaped window replacement (arched or eyebrow, low-E insulated glass, aluminum or fiberglass frame, installed) typically runs $900 to $2,400 per opening depending on the profile and the amount of masonry reanchoring required. Architectural SDL grilles add $140 to $380 per sash. A full storefront reglazing job with new aluminum framing starts around $3,500 for a single storefront and scales up from there. Curtain wall panel replacement runs $1,800 to $6,000 per panel depending on access, glass type, and whether the mullion needs rebuilding. Original steel casement replacement in a masonry wall is the most specialized job we do in St. Leo: budget $1,600 to $4,200 per window, which includes field measurement, custom fabrication, masonry anchor hardware, and historical-profiling-compliant glazing. Call (954) 280-4413 for a written estimate. We do not give verbal ballparks we won’t stand behind, and estimates are free.
We Also Serve Cities Near St. Leo
From St. Leo, our crews regularly work in Acacia Villas, Alafaya, Altamonte Springs, and Altoona. If your property sits outside the immediate St. Leo boundary but you’re dealing with the same historic masonry or mid-century ranch window problems, call us. We know this ridge of Pasco County because we’ve worked every corner of it.
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 - Custom Windows & Doors in St. Leo
Yes. We remove the old steel sash and frame in sections, leaving the surrounding mortar joints intact. We then set a custom-sized replacement unit with hot-dip galvanized masonry anchors and a low-expansion sealant rated for historic brick and block. The original opening dimensions are field-measured, and the new window is fabricated to fit. Call (954) 280-4413 to have us look at your building.
No. St. Leo sits outside the wind-borne debris region, so most residential projects require code-compliant tempered or laminated glazing rather than full impact-rated hurricane windows. However, the Florida Building Code still requires wind-load-rated products for all new and replacement windows, though Impact Windows & Doors in St. Leo are not required. We spec laminated glass where the code requires it and skip the unnecessary impact frames.
Fog between the panes means the glass unit’s seal has failed. The desiccant in the spacer bar has absorbed all the moisture it can hold, and the interior cavity now condenses under temperature swings. There is no resealable fix for a blown insulated glass unit. The glass pack gets replaced. In St. Leo’s humid climate, a failed seal shows up within months, not years.
Yes. We install SDL bars (simulated divided lites) on the interior and exterior faces of a sealed insulated glass unit to replicate the sightlines of true divided-lite sash. The grille profile, muntin width, and spacer color are matched to the originals, while the glass carries low-E coatings and argon fill. This meets historical profiling requirements without sacrificing thermal performance.
We use a three-part system: backer rod at the correct depth, tooled elastomeric sealant at the exterior jamb-to-masonry interface, and a continuous aluminum or PVC trim coil over a properly flashed rough opening. The flashing must be rated for masonry substrate, not interior-grade tape. We also install a continuous sill pan below the unit to drain any moisture that gets past the exterior seal.
Call TruePane Windows & Doors for an Estimate in St. Leo
When you’re ready for our Window Replacement in St. Leo or a new door, call (954) 280-4413. We’ll send a technician who measures every opening twice, quotes manufacturer lines side by side on paper, and explains exactly what he’s installing and why. You get a written line-item estimate before any work begins. We register both warranty layers before the truck leaves your driveway. And if the pane isn’t true, the job isn’t done. That’s the standard Dale Kessler built the company on in 2008, and it’s the standard that governs every job we do in St. Leo today.
Written by Dale Kessler, Owner at TruePane Windows & Doors.
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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