Therma-Tru Custom & Geometric Windows Nationwide | Winslow Windows & Doors

Therma-Tru Custom & Geometric Windows in Fort Lauderdale: What to Know First

Therma-Tru custom and geometric windows in Fort Lauderdale typically run $600 to $2,800 per opening installed, depending on the shape, size, and whether the unit needs impact glazing. Most custom-shape replacements take 4 to 8 weeks from order to install because Therma-Tru builds arches, radius tops, and other non-rectangular units to spec, not off a shelf. We’re an independent Therma-Tru service provider, not a factory-authorized dealer, which means we tell you the truth about what to repair, what to replace, and what to walk away from. If you live in a Fort Lauderdale home with a radius-top window that’s fogged, a geometric picture unit that’s lost its seal, or an original Therma-Tru fiberglass frame that’s pulled away from the rough opening, this page tells you exactly what you’re dealing with. Call Ed Winslow and the team at Winslow Windows & Doors at (904) 747-8989 and you’ll get a real person, not a voicemail tree.

Call (904) 747-8989

How Therma-Tru Products Fail - and How We Fix Them

Therma-Tru’s reputation was built on fiberglass entry doors, but their window line shows up all over Fort Lauderdale, often as architectural accents around front entries, transoms above doors, and geometric picture units flanking porches. After over a decade pulling these units apart in South Florida, we’ve seen the same failures repeat. Here’s what actually goes wrong:

• Radius-top seal failure on Therma-Tru Benchmark and Profile series units. The curved insulating glass unit (IGU) in a half-round or elliptical top flexes with every temperature swing, and in Fort Lauderdale’s humidity, the desiccant strip inside the spacer saturates early. You’ll see fog between the panes that never clears by noon. Fix: we pull the unit, verify the frame is square, and order a custom IGU cut to the exact radius. Slapping a square replacement in a radius opening is a hack we refuse to do.
• Warped fiberglass frame sashes on larger geometric windows. Therma-Tru fiberglass frames from the 2000s and early 2010s have a documented history of bowing on wide fixed units, especially trapezoids and half-rounds over 48 inches. We see this constantly on Fort Lauderdale Mediterranean Revival homes with big porch transoms. The frame bows, the IGU’s edge seal fails within months, and the window won’t close flush. Fix: we shim, re-anchor, and replace the unit, but when the frame isn’t salvageable, we’ll tell you it’s time for a full replacement instead of patching a dying frame.
• Water intrusion around custom-shaped units with site-applied glazing beads. Therma-Tru’s more unusual geometries often ship with a two-piece glazing system that relies on a thin bead of sealant at the seam. In Fort Lauderdale, after 5 or 6 rainy seasons, that bead hardens and pulls away from the frame, and water sneaks in during afternoon thunderstorms. You’ll see staining on the interior drywall below the window, usually on the leeward side. Fix: we re-bed the unit in fresh sealant, re-seat the beads, and test with a water hose before we call it done.
• Failed balance systems on Therma-Tru double-hung units with arched tops. Homeowners don’t usually think about it, but a half-round double-hung with a curved top has a weight distribution problem. The balance springs on the arch side fatigue faster than the square side. Symptom: the top sash drops like a rock after about year 8. Fix: we replace the balance hardware with a matched set, not a single spring, so the sash doesn’t torque itself out of square.
• Condensation between panes on Therma-Tru decorative glass packages. Therma-Tru’s stained or etched glass inserts on geometric windows (common in Fort Lauderdale’s Coral Ridge and Victoria Park neighborhoods) use a sealed air space that’s shallower than standard units. When that seal breaks, you get condensation on the inside face of the decorative glass, not the outside. It looks like cleaning won’t help, and it won’t. Fix: the insert is a sealed unit and needs to be replaced as a piece. We source the correct Therma-Tru pattern or match it with a quality aftermarket equivalent.

One more thing worth saying: on any repair where a window is tall, arched, or heavy enough that it can’t be handled from inside, we use proper lift equipment and a second tech. Ed’s rule is simple: nobody gets hurt hanging a 90-pound radius unit over a second-story porch. We bring the right gear, or we don’t take the job.

Our Therma-Tru Custom & Geometric Windows Process

Every Therma-Tru job we take in Fort Lauderdale follows the same path. No shortcuts, no mystery steps, no surprise invoices.

1. 1
   Call and talk to a live person. You call (904) 747-8989, someone answers. We ask what you’re seeing: fog, draft, water stains, a sash that won’t stay up. We’ll tell you over the phone whether it sounds like a repair or a replacement, and whether it’s worth scheduling a visit.
2. 2
   On-site inspection and measurements. We come out, pull the inside stops where it’s safe to do so, inspect the frame corners, check the rough opening for water damage, and measure the unit at three points per side including the arc. On a curved opening, a half-inch measurement error means an 8-week delay.
3. 3
   Parts decision: OEM or aftermarket. For warranty-covered units, we only use Therma-Tru OEM parts so the manufacturer warranty stays intact. For older units out of warranty, we weigh OEM lead times against quality aftermarket options. You get the tradeoff explained in plain English before anything is ordered.
4. 4
   Order and build to spec. Custom geometry means no off-the-shelf units. We verify the radius template against the physical opening, not just a drawing. If you’re replacing the frame, we spec the exact jamb depth and nailing flange so the new unit seats without shimming gymnastics.
5. 5
   Install, seal, and test. We set the unit, shim it square, secure it to the rough opening, and seal the exterior with flashing tape and caulk rated for South Florida humidity. Then we test: close-and-lock cycle on every operable sash, a hose test on the exterior, and an interior inspection for light leaks.
6. 6
   Cleanup and walkthrough. We clean the glass, vacuum the work area, and walk the window with you. You sign off, and our 36500-Day Done Right Promise goes into effect.

What Therma-Tru Custom & Geometric Windows Costs in Fort Lauderdale

The price of Therma-Tru custom and geometric window work in Fort Lauderdale depends on three things: the shape, the glass package, and whether you’re repairing or replacing. Here’s what we’ve charged on real jobs in neighborhoods like Victoria Park, Rio Vista, and Imperial Point:

• Reglaze a standard rectangular Therma-Tru IGU (fogged or failed seal): $220 - $550
• Reglaze a radius-top or half-round IGU (custom cutting required): $500 - $950
• Replace balance hardware on a Therma-Tru double-hung (matched set): $180 - $380
• Full replacement of a custom-shape Therma-Tru window (42×60 trapezoid, non-impact): $900 - $1,800
• Full replacement with impact-rated glass, custom geometry: $1,400 - $2,800

What moves the price: whether the opening needs new framing, whether you’re in a historic district with review-board requirements (common in parts of Fort Lauderdale), and whether the existing frame is square enough to reuse. We give you a written, line-item estimate before any work is ordered. No change orders buried in the fine print. Call (904) 747-8989 and we’ll price your exact window.

Why Fort Lauderdale Homeowners Call Winslow Windows & Doors for Therma-Tru Work

Ed Winslow grew up in Miami and learned early that South Florida weather doesn’t give you a second chance on a bad installation. He trained in building construction technology at Miami Dade College before working his way through rough openings, impact glazing, and weatherproofing. For over a decade, Ed and his crew have served Fort Lauderdale homeowners in older homes near Las Olas Boulevard and newer builds closer to the beach. He built this company on showing up when he says he will and standing behind every frame and seal long after the check clears.

We’re not a national chain. Winslow Windows & Doors is locally owned and owner-operated since 2011, with a published address, a state license, and Ed’s name on every job. Our techs are background-checked, uniformed, and trained on Therma-Tru’s quirks specifically, not just generic window work. And because we’re authorized installers for PGT, CGI, CWS, and ES Windows as well as Therma-Tru, we’ll never push you toward a brand we happen to have in stock. If a Therma-Tru repair makes sense, we say so. If it doesn’t, we’ll tell you that too. Every job carries our 36500-Day Done Right Promise: if it’s not done right, we come back and make it right. That’s Ed’s word, and it’s not a sales pitch. It’s a 100-year standard.

FAQs