Therma-Tru Window Replacement Nationwide

Therma-Tru Window Replacement: The Fort Lauderdale Owner’s Guide

If you have a Therma-Tru window with a failed sash, rotted frame section, or a fogged insulated glass unit, we stock and install Therma-Tru-compatible replacements across Fort Lauderdale, with most single-window jobs running $450 – $1,100 installed depending on size and glass package. Most owners discover the problem the same way: a window that won’t lock, visible condensation between panes, or a frame section that’s gone soft from years of coastal humidity. We carry replacement sashes, balance systems, and full-frame Therma-Tru window units, and in many cases we can complete the swap the same visit.

Call (754) 354-1396

Which Therma-Tru Models This Applies To

Therma-Tru’s residential window line spans a few distinct series, and the replacement part you need depends on which one you have. The most common in Fort Lauderdale homes are the Classic-Craft vinyl windows (double-hung and single-hung), the Benchmark series (builder-grade, often found in homes built between 2005 and 2018), and the Legacy series (higher-end, with beefier frames and better glass packages). Therma-Tru also produced sliding windows and fixed picture units under these same series names.

Here’s the compatibility gotcha that trips up a lot of owners: Therma-Tru sashes are not universal across series. A Classic-Craft sash will not drop into a Benchmark frame. The balance shoe, pivot bar, and jamb liner profile all differ. If you’re ordering just a sash rather than a full window, you need the series name and the exact glass size, measured to the 1/8 inch. We match parts by the etched corner code on the original sash (a small alphanumeric stamp, usually on the lower left corner of the frame) plus your measurements. No code, no guesswork: we bring both to the job and verify before cutting anything.

On the OEM versus aftermarket question: Therma-Tru-branded replacement parts are still available for most series, but lead times from the manufacturer can run two to three weeks. For glass-only replacements, we use Vitro and Cardinal insulated glass units cut to Therma-Tru sash specs, which meets or beats the original glass performance at roughly 20 – 30% less than OEM glass. Juniper Windows Fort Lauderdale is an independent service provider, not affiliated with Therma-Tru, so we can mix OEM frames with quality aftermarket glass where it makes sense for the budget.

Signs Your Therma-Tru Window Replacement Is Failing

• Condensation or fog between the panes. The seal on the insulated glass unit has failed. South Florida humidity has worked its way inside the airspace, and once that happens the low-E coating starts to degrade. The glass is done; no defogging trick fixes it.
• Sash won’t stay up or is hard to raise. The balance system (either a block-and-tackle or spiral balance, depending on the series) has worn out or the pivot bar snapped. On Therma-Tru Benchmark units, the plastic balance shoe is the usual first failure point.
• Window won’t lock or latch. Warped sash rails or a bent lock mechanism. In coastal Fort Lauderdale, we see this on west-facing windows more than any other; years of afternoon heat cycles slowly deform the vinyl.
• Drafts or daylight visible around the sash edges. Compressed or rotted weatherstripping, especially on the sill. Once the seal is gone, the window leaks air and your A/C works harder. In older Therma-Tru units, the jamb liner itself has cracked.
• Visible rot or soft spots on the frame (wood-clad models). If you have Therma-Tru’s older wood-clad windows, Fort Lauderdale’s wet season is brutal on the bottom corners where water sits after a storm. Soft wood means the structural frame is compromised, not just the sash.

Replacement Cost & What’s Included

Here’s the honest price breakdown for Therma-Tru window replacement in the Fort Lauderdale market, installed:

• Glass-only replacement (seal failure): $180 – $420 per window. New insulated glass unit, new glazing bead, same visit if glass is in stock.
• Sash replacement (sticking, balance issues, warped sash): $320 – $650 per window. New Therma-Tru or spec-matched sash, new balance system, adjusted and tested.
• Full-frame window replacement (rot, complete failure, or upgrade): $650 – $1,100 per window, depending on glass package. This includes removal, new window, flashing, insulation, trim, and disposal.

Every quote is a written, line-item price before we start the work. That means the number on the estimate is the number on the invoice. Labor, parts, disposal, tax; it’s all in there. And every Therma-Tru replacement we install is covered by the 365-Day Done Right Promise: 365 days, parts and labor, in writing. If the sash sticks or the glass fogs inside a year, we come back and fix it at no charge.

DIY or Call Us?

There are a couple of things worth checking before you call. If your window is fogged, run a finger across the glass; if the condensation is on the outside, that’s just Florida humidity, not a seal failure. If the sash is stuck, look for debris in the track; a shot of silicone spray on the jamb liner sometimes buys you a month. But here’s where DIY goes sideways on Therma-Tru windows: the balance systems on double-hungs are under tension, and prying a sash out without disengaging the pivot bar correctly will shear the shoe and strip the jamb liner. Then you’re buying the whole repair anyway, plus a damaged frame. If the window is difficult to lift, won’t lock, or has moisture between the panes, that’s a parts and labor job. Call us at (754) 354-1396 and we’ll walk you through it: if it’s something you can handle, we’ll say so.

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