Therma-Tru Window Replacement Nationwide | TruePane Windows & Doors

Therma-Tru Window Replacement: The Wellington Owner’s Guide

Therma-Tru window replacement in Wellington typically runs $300-$900 installed per window, depending on the series and whether the sash, glass, or full frame is being swapped. We keep common Therma-Tru window components on the truck and can match most models same-day. The way it usually goes: a homeowner notices a draft in the guest bath that was not there last January, or condensation that will not wipe off because it is between the panes. That is when the phone rings.

Call (561) 349-4826

We are an independent service provider, not affiliated with Therma-Tru, and that works in your favor if you want straight answers about what actually fails on these units in South Florida weather.

Which Therma-Tru Models This Applies To

Therma-Tru’s window line covers three families you are likely to have in Wellington: the Classic-Craft series (fiberglass, most common in newer builds), the Slim-Line series (narrower frame, common in replacements where the original opening is shallow), and the older Benchmark viny l line found in early-2000s homes around Olympia and Buena Vida.

The identification gotcha we see constantly: homeowners assume the window brand written on the glass is the window brand. It is not. Therma-Tru etches its own nameplate onto the edge of the frame, typically on the bottom rail of the sash, with a series code that starts “TT-W.” If you cannot find that label, measure the visible glass width and the overall sash width. A Classic-Craft double-hung runs 3-1/4 inches thick at the frame; the Slim-Line runs closer to 2-7/8. Those measurements determine which replacement sash or glass cartridge will actually seat.

For Therma-Tru specifically, we recommend OEM sash and balance assemblies over aftermarket glass packages. The fiberglass frame’s thermal expansion rate in a Wellington summer is unforgiving, and an aftermarket glass unit that is even 1/16 inch out of spec will show stress cracks at the seal by year three. Aftermarket hardware like locks and tilt latches performs about the same as OEM. The glass and the balance system, no.

Signs Your Therma-Tru Window Replacement Is Failing

• Persistent fogging between panes. The desiccant in the insulating glass unit is saturated. In Wellington’s humidity, that happens a few years sooner than the manufacturer’s 20-year projection. Once the fog appears, the seal has failed and the glass unit is finished.
• Sash that drops an inch when you let go. The block-and-tackle balance system inside the frame has worn. On Classic-Craft units, this shows up first on west-facing windows in Wellington, where the afternoon sun bakes the synthetic cord until it loses tension.
• Visible daylight at the meeting rail. The weatherstripping on Therma-Tru sashes is a bulb seal that compresses permanently after years of Florida heat cycling. It is replaceable, but if the frame itself has shifted, no new seal will fix the gap.
• Hard cranking or a tilt latch that will not engage. The pivot pins and lock shoes wear together. This is the most common repair call we take for Therma-Tru windows in Wellington, and it is usually a 20-minute fix if caught before the sash frame strips.
• Water staining on the interior sill after a hard storm. The weep system in the bottom track is clogged or the sill dam has failed. Event-season rains will find that gap, and the fix is sometimes a new sill assembly rather than a new sash.

Replacement Cost & What’s Included

Here is the straight pricing picture for Therma-Tru window work in Wellington:

Those ranges are what we actually quote in Wellington right now. What moves the number: frame damage from a prior bad install, stucco work if the opening has shifted, and whether the unit is impact-rated, which Wellington code requires on any opening you are replacing. Every quote we leave is a line item on paper: part cost, labor, disposal, tax. Both manufacturer warranty layers get registered in writing before our truck leaves your driveway, and the Done Right Promise covers the workmanship. No fine print.

DIY or Call Us?

You can safely check a few things yourself: confirm the window’s series label on the bottom sash rail, measure the sash width to the nearest 1/16 inch, and note whether the glass unit is single or insulated by counting the reflections in the corner. That information gets you an accurate quote over the phone.

What you should not attempt: removing a Therma-Tru sash to disassemble the balance system. Those coil springs and block-and-tackle assemblies hold real tension, and a fatigued balance that releases while your hand is inside the frame will break fingers, not windows. Glass unit removal is less dangerous but very easy to get wrong: a hairline shoulder crack from forcing the cartridge into a frame that has shifted slightly. We carry the correct glazing shims and setting blocks for Therma-Tru’s specific frame depth, and we pull the old unit without chipping the fiberglass. If you are not certain, call (561) 349-4826 first. We would rather talk you through the simple checks than see you make a $300 problem into an $800 one.

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