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Therma-Tru Custom & Geometric Windows in Fort Pierce: What to Know First
Therma-Tru custom and geometric windows in Fort Pierce run $900 to $2,800 installed in most cases, with arched transoms and oversized picture units sitting at the top of that range. Turnaround is typically 3 to 6 weeks for custom shapes once the opening is measured and the order is placed. As an independent Therma-Tru service provider, TruePane Windows & Doors handles the full scope: replacement, repair, glass-only swaps, and full-frame work on everything from eyebrow arches to custom trapezoids, and we give you a written line-item quote before anything gets ordered.
This page is written for the homeowner whose Therma-Tru window has become a problem: a fogged sealed unit in a half-round over the entry, a custom octagon that leaks at the corner joints, or an arched unit the original installer never quite set square. If you own a Therma-Tru window with a shape to it, call (772) 218-5890. We will tell you honestly whether it is a repair or a replace, and what it should cost.
Key Takeaways:
- We work on all Therma-Tru custom and geometric window types: arches, half-rounds, ovals, trapezoids, and oversized rectangles
- Both warranty layers registered in writing, durations stated, before the truck leaves your driveway
- Live person answers the phone 24/7 at (772) 218-5890
- Written line-item pricing. No surprises on the bill
How Therma-Tru Products Fail - and How We Fix Them
Therma-Tru built its name on fiberglass entry doors, not windows. That matters. Their window lines lean on licensed profiles and imported glass packs, and in Fort Pierce humidity the failure points show up faster than they would in, say, Ohio. Here is what we actually see on Therma-Tru custom and geometric windows in this part of Florida:
- Seal failure in the Signature Series half-rounds and eyebrow arches. Therma-Tru’s Signature Series uses a foam-enhanced frame that is decent on straight windows, but the curved glass packs in their radius units are the weak link. The butyl seal around the insulated glass unit thins at the apex of the curve. We open up half-rounds regularly where the seal is still intact at the bottom chords but the top third has fogged. The fix is a new IG unit cut to the exact radius, not a haze removal kit.
- Corner joint separation on octagons and trapezoids. Any geometric window pushes corner welds harder than a rectangle does. We have pulled Therma-Tru octagon units in Fort Pierce where the vinyl corner keys had shifted 3/16 of an inch out of plane, which lets water wick behind the frame during a coastal storm. That is a full-frame replacement in most cases, because re-welding a factory corner on a geometric unit is a gamble, not a repair.
- Frames rotting at the sill on Older Classic Series geometric units. The older Therma-Tru Classic Series used wood mainframes with an aluminum cladding that does not fully wrap the sill on radius models. On Fort Pierce homes near the Indian River or the ocean, salt air gets in at the corners and the wood swells and rots under the cladding. You cannot see it until the sash starts dragging or the finish bulges. We replace these with composite or vinyl full-frame retrofits.
- Hardware failures on oversized operable units. Therma-Tru’s casement and awning hardware on custom sizes over 36 inches wide is often undersized for the weight of the sash. In Fort Pierce homes we see crank mechanisms stripped and hinges sagging on 40- and 48-inch custom casements. The honest fix is a new vent unit with heavier hardware rated for the sash weight, not a third replacement crank.
- Improper original installation on custom arches, especially over entry doors. This is not a Therma-Tru manufacturing issue, but it is the most common Therma-Tru job we walk into. An arched transom over a front door has to carry the lintel load, and if the installer did not shim the radius correctly, the frame flexes and the glass eventually cracks from corner to corner. We have replaced at least a dozen of these in St. Lucie County where the crack ran exactly through the center of the arch. The fix is either a new unit or a glass replacement, but only after the opening is re-shimmed and the load is corrected. Nobody puts a new piece of curved glass into an out-of-true opening and expects it to hold.
Our Therma-Tru Custom & Geometric Windows Process
Here is how a Therma-Tru custom window job goes at TruePane, from the first phone call to the cleanup:
- 1
You call (772) 218-5890. A live person answers. No phone menu, no callback request. We ask what shape the window is, when the problem started, and whether you have the original paperwork.
- 2
We schedule a site visit. A background-checked, uniformed technician comes out, takes the opening measurements twice, and checks the square of the frame. For geometric units we also template the opening, because a drawing is not the same as the actual glass shape.
- 3
We write the quote on paper, side by side. OEM Therma-Tru parts where they matter, quality aftermarket where they do not, and we explain the difference in plain English. You see the prices before you commit to anything.
- 4
We order the glass or the replacement unit. For custom shapes it is usually 3 to 6 weeks from order to delivery. We register your manufacturer warranty layers in writing before the truck leaves the driveway, with the durations stated on the invoice.
- 5
We install, test, and clean up. The technician sets the unit, checks the reveal, cycles the sash if it is operable, and cleans the glass. If the pane is not true, the job is not done.
- 6
You get the Done Right Promise. If it is not right, we make it right. No paperwork fights, no arguing.
What Therma-Tru Custom & Geometric Windows Costs in Fort Pierce
Custom window pricing depends on the glass shape, the frame material, and whether the existing opening needs structural correction. Straight replacements on rectangular Therma-Tru units will not reflect what a custom radius costs. Here are our typical installed ranges for Therma-Tru work in Fort Pierce:
| Job Type | Typical Installed Range in Fort Pierce |
|---|---|
| Single replacement glass pack on a half-round or eyebrow arch | $600-$1,200 |
| Custom arch replacement unit (full frame, composite) | $1,100-$2,400 |
| Octagon or trapezoid replacement (full frame) | $1,200-$2,100 |
| Oversized picture or casement unit (48″ or wider) | $1,400-$2,800 |
| Glass-only replacement on a thermally-broken custom unit | $800-$1,600 |
What moves the price: whether the opening needs re-shimming, whether the frame is wood or composite, how tall the unit is (scaffold or lift work adds cost), and what glass package you choose. We write every number down before we start, and the price we quote is the price you pay. Call (772) 218-5890 for a free estimate on your specific window.
Why Fort Pierce Homeowners Call TruePane Windows & Doors for Therma-Tru Work
We have been doing residential windows and doors on the Treasure Coast since 2008, and Dale Kessler started TruePane in 2008 with a rule he keeps on the whiteboard to this day: if the pane is not true, the job is not done. That is not a slogan. It is the reason we measure openings twice, template geometric units, and register both manufacturer warranty layers in writing before the truck leaves. Our technicians are background-checked and uniformed, and they work in your home the way they would work in their own mother’s.
When Therma-Tru is not the right answer, we tell you. TruePane is an authorized installer for more than a dozen manufacturer lines, and on custom window work we regularly quote PGT, CGI, CWS, and ES Windows side by side with Therma-Tru so you see exactly what you are buying. A square deal, on paper, every time.
FAQs
A custom Therma-Tru window in Fort Pierce typically costs $900 to $2,800 installed, depending on shape, frame material, glass package, and whether the opening needs structural work. Glass-only replacements on radius units run $600 to $1,600. For an exact written quote, call (772) 218-5890. Estimates are free.
In most cases we can replace just the insulated glass unit in a Therma-Tru arch, as long as the frame is still square and the seal failure is the only issue. If the frame has shifted at the corners or shows water intrusion, a full replacement is the honest call. We inspect before we recommend, and you see the numbers either way. Call (772) 218-5890 and we will take a look.
No. The price we quote is the price you pay. The only exception would be if we open up a wall and find structural damage behind the frame that no one could have seen before demo, and even then, we stop and get your written approval before spending another dollar on the job. Call (772) 218-5890 and we will walk you through exactly how we price a Therma-Tru replacement.
Yes, when the job requires it. Fort Pierce and St. Lucie County building codes govern structural window replacements and impact-rated openings, and we pull the permits and schedule the inspections ourselves. You do not chase paperwork. Call (772) 218-5890 with your address and we will tell you what your specific job needs.
From the day we template the opening, most custom Therma-Tru windows arrive in 3 to 6 weeks. Straight glass replacements are often faster. We will give you a firm timeline when we write the quote, and we will be there when we say. Call (772) 218-5890 to get the process started.
Contact TruePane Windows & Doors
If you own a Therma-Tru custom or geometric window in Fort Pierce and it is fogged, leaking, cracked, or out of square, call us at (772) 218-5890. A live person answers, 24 hours a day, 7 days a week. We will schedule the site visit, measure the opening, and hand you a written quote before you commit to a thing. As Dale Kessler says: if it is not right when the caulk dries, it will not be right in two years either. Call (772) 218-5890 for your free estimate.
Written by Dale Kessler, Owner, TruePane Windows & Doors at TruePane Windows & Doors, serving Fort Pierce and nearby areas.
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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