Therma-Tru Window Replacement Nationwide | TruePane Windows & Doors

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

Therma-Tru window replacement in Miami typically runs $85 to $240 installed per sash or insulated glass unit, depending on the series, glass package, and whether the frame itself needs work. We keep common Therma-Tru-compatible sashes, balances, and glass packs on our trucks, so most jobs wrap up in one visit. The call usually starts the same way: a homeowner notices the window won’t stay up, draws condensation between the panes, or feels a draft that wasn’t there last hurricane season.

Call (561) 489-4036

Here’s the thing about Miami’s salty, humid air: it doesn’t forgive a window that was never quite right. Therma-Tru entry doors are everywhere in Dade County, but their windows show up in plenty of homes too, and when a sash balance or a seal lets go, the heat and moisture get in fast. We’ve pulled units out of Coral Gables homes where the hardware was fine but the flashing above the window had been done wrong for years. That’s the kind of thing you only catch when you’re on a ladder with a flashlight and the time to look.

Which Therma-Tru Models This Applies To

Therma-Tru has moved through several window lines over the years, and the replacement path depends on which one you have. If your window has a silver or white sticker on the frame edge or the top of the sash, that’s your series number. Common series we match include the Integrity line, the older Benchmark window units that paired with Therma-Tru door systems, and the sliding windows that went into Miami ranch and mid-century homes during the 1980s and 1990s rebuilds. No sticker? We’ll measure the visible glass, the sash thickness, and the balance channel width to establish what fits.

One gotcha to know: Therma-Tru window balances are not a universal drop-in. A 30-inch double-hung from the Integrity series uses a different balance than the same-looking unit from the older Benchmark line. The difference can be as small as 3/8 inch on the channel, but that’s enough to bind or drop. For glass packs, OEM replacement makes sense when the warranty is still live. When it’s not, we quote quality aftermarket options side by side on paper so you see the price difference and the glass spec difference before you decide. Dale Kessler has always read the rough opening and the existing frame before ordering anything. Measure twice, order once, and put everything in writing.

Signs Your Therma-Tru Window Replacement Is Failing

• Sash won’t stay up or slides closed on its own. This is almost always a failed balance. Miami’s heat breaks down the internal spring or the spiral rod over time, and once it goes, the window won’t hold position.
• Condensation or haze between the panes. A failed insulated glass seal. In South Florida’s humidity, a pinhole in the seal draws moist air in, and once that happens, the fog isn’t going away. It’s replacing the glass pack or the sash, not cleaning it.
• You can feel air moving around the closed sash. Usually worn weatherstripping or a frame corner that’s opened up. Near the Intracoastal in Miami, we also see salt corrosion eating the weatherstrip channel itself.
• Window sticks or requires real force to open. The jamb liner has warped from heat or the balance shoe has cracked. Forcing it just breaks more hardware.
• Visible cracking at the lower sash corners or frame joints. That’s a structural problem, not a hardware one. If it’s caught early, you may only need a sash. If it’s been there a while, the water intrusion is already working on the framing.

Replacement Cost & What’s Included

For Miami, a single sash replacement for a Therma-Tru double-hung or slider generally lands between $85 and $160 installed when the frame is sound. A full insulated glass pack replacement runs $120 to $240 depending on size, Low-E versus clear glass, and whether it’s a standard or impact-resistant laminate. A complete window replacement, frame and all, runs from $350 to $900 per opening with the range driven by opening size, impact rating, and finish.

Every quote includes the part, the labor to set it true and seal it right, and the written warranty registration before the truck leaves your driveway. That’s The Keystone Standard at work: both manufacturer warranty layers registered in writing, durations stated, no fine print that covers neither. You’ll get a line-item quote before any work starts, so there’s no surprise on the bill. We don’t do change orders on a replacement job that was measured correctly the first time.

DIY or Call Us?

You can safely check a few things before picking up the phone. Look for the sticker with the series number, note whether the sashes are fogged or physically cracked, and watch how the window behaves when you lift it. That information shortens the diagnosis when you call. You can also wipe down the tracks and confirm whether the lock engages cleanly, which helps us rule out alignment versus hardware.

What we’d tell you not to tackle is the actual replacement of a balance or a glass pack. A balance under tension will take a chunk out of your hand if it releases the wrong way, and a glass pack set wrong can crack under Miami’s summer heat or, worse, during a wind event. It’s not a scare tactic, it’s reality. If the pane is not true, the job is not done. That rule keeps our technicians slow and deliberate, and it keeps homeowners out of the ER. Call (561) 489-4036 when you’re ready for us to come look at it.

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