Therma-Tru Window Replacement Nationwide

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

Therma-Tru window replacement in Fort Lauderdale typically runs $380 – $720 per window installed, depending on glass package, size, and whether the frame needs rebuilding. We stock Therma-Tru-compatible sashes, balance systems, weatherstripping, and glass packs on our trucks, and most single-window swaps are completed in one visit. Homeowners usually discover they need a replacement when the sash sticks mid-raise, condensation fogs the glass permanently, or a draft starts sneaking through a corner that used to seal tight.

Call (754) 354-5397

If you’re reading this, chances are you’ve already noticed something’s off: a window that won’t stay up, a lock that won’t catch, or water staining the drywall below the sill. Therma-Tru built a good product, but Fort Lauderdale’s salt air, summer humidity, and hurricane-season rain cycles punish window hardware faster than almost anywhere else in the country. The good news: in most cases you don’t need a whole new window. You need the right part, matched to your exact model, installed by someone who’s done it a thousand times.

Key Takeaways

• Therma-Tru window replacement parts are model-specific: a balance from a 200 series won’t fit a 400 series, and glass packs are sized to the sash, not the frame opening.
• Installed replacement cost in Fort Lauderdale runs $380 – $720 per window, with the written price in your hand before any work starts.
• Fogged glass, stiff operation, and failed balances are the three most common Therma-Tru failures we see in coastal Florida.
• We’re an independent installer, not a Therma-Tru factory outlet, and we carry parts for PGT, CGI, CWS, and other major lines too.

Which Therma-Tru Models This Applies To

Therma-Tru’s window line spans several series, and the replacement part you need depends on which one is in your opening. The most common in Fort Lauderdale homes are the Smooth-Star and Classic-Craft series, which share frame profiles but use different sash retainers. The newer Pulse series has its own balance cartridge design that doesn’t interchange with older models. Here’s the gotcha we see regularly: homeowners pull a sticker off the glass, search the model number online, and order a balance or sash kit that’s off by a quarter inch. Then it binds, or drops, or won’t lock, and now they’ve spent money on a part they can’t return.

The reliable way to identify your part is to measure the visible glass width and height to the sixteenth of an inch, then check the spacer bar between the panes for a laser-etched code. Therma-Tru stamps manufacturing dates and plant codes on the spacer, and that code tells us exactly which sash generation you have. When the OEM part is discontinued, we match to a quality aftermarket equivalent that meets the same AAMA performance rating. Our rule: the part either matches the original spec or it doesn’t go in your window.

We work on Therma-Tru windows, but we also carry parts for PGT, CGI, and CWS, so if a previous owner mixed brands across the house, one call covers it.

Signs Your Therma-Tru Window Replacement Is Failing

• The sash won’t stay up, or drops when you let go. The balance system, either a spiral or block-and-tackle depending on the series, has lost tension. In Fort Lauderdale, salt air corrodes the internal springs faster than the manufacturer’s typical 10 – 15 year service life.
• Condensation between the glass panes that doesn’t wipe off. The insulated glass unit’s seal has failed. We see this constantly within five miles of the Intracoastal, where humidity pushes moisture into any micro-breach in the sealant.
• A draft you can feel with your hand, even when the window is closed and locked. The weatherstripping has compressed or rotted. On Therma-Tru windows, the sill and head bulb seals often wear out before the sash itself.
• The lock or keeper doesn’t engage cleanly. The sash has settled or the keeper plate has shifted, which means the frame or corner keys have moved. In a hurricane zone, this is the one you shouldn’t ignore.
• Visible rot or softness at the bottom corners of the frame. If water wicked past the exterior flange and soaked the wood or composite frame, surface repairs aren’t enough; you’re looking at a full frame replacement.

Replacement Cost & What’s Included

For Fort Lauderdale specifically, here’s the pricing picture we give homeowners before they commit:

• Sash replacement only (glass pack + sash frame): $380 – $520 installed per window. This covers a failed seal, cracked glass, or a sash that’s warped beyond repair.
• Balance system replacement (both sides): $140 – $220 per window, including the labor to remove the sash, swap the balances, and reset the tension so the window operates correctly.
• Full frame replacement (rot or frame damage): $520 – $720 per window, including new sill, brickmold where applicable, and weatherproof flashing.

Every one of those prices is a written line-item quote you get before we start. That’s the Kingswell Way: say the price before the work, show up when we said we would, leave the place cleaner than we found it, and put the guarantee in writing. What drives the range is glass type, whether the frame needs rebuilding, and whether you’ve got hurricane-rated glazing that must be matched and recertified.

The workmanship warranty covers the installation and parts we supply. If the repair fails within the guarantee period, we come back and fix it at no charge, and every customer gets a written guarantee at job completion. Westlight’s been doing this in Fort Lauderdale since 2009, and we didn’t build a reputation on re-quoting jobs at the door.

DIY or Call Us?

There are a few things you can safely do yourself before calling anyone. Check whether the window operates differently with the lock disengaged, because sometimes the keeper is just misaligned and a simple adjustment sorts it. You can also clean the tracks, which in Fort Lauderdale collect salt film and sand that makes windows feel like they’re failing when they’re just dirty. But here’s where DIY goes wrong: forcing a sash out of a Therma-Tru frame with a stuck balance. Those balance springs are under constant tension. If you release one incorrectly, the sash can drop hard enough to crack the tile below, or worse, take a finger with it. We’ve repaired more than one window where a homeowner got in over their head and ended up with a broken sash, a bent track, and a bigger bill than if they’d called us first.

Owen Satterfield grew up around construction and trained in building construction technology at LA Trade-Technical College before putting in windows across South Florida for nearly two decades, including whole-house impact projects along Las Olas Boulevard. He’ll be the first to tell you: “Tell me what the house needs, and we’ll figure out the rest from there.” If you’d rather spend your Saturday doing something else, call (754) 354-5397 and we’ll come take a look.

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