Therma-Tru Window Replacement Nationwide | Winslow Windows & Doors

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

Replacing a failed Therma-Tru window in Westgate typically runs between $400 and $1,200 installed, depending on whether it’s a sash, a full frame, or hardware. We stock the most common Therma-Tru replacement components on our trucks, so most jobs in Westgate are done in a single visit. You usually find out the hard way: a window that won’t latch, a sash that sticks when the humidity spikes, or a draft you can feel standing three feet away.

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Therma-Tru built its reputation on fiberglass doors, but their window lines share the same design philosophy: durable frames, tight seals, and components engineered to work together. When one part gives out, matching it correctly matters more than most people realize. We’re an independent service provider, not a Therma-Tru corporate affiliate, which means we’re free to give you straight answers about what makes sense to replace and what doesn’t.

Which Therma-Tru Models This Applies To

Therma-Tru’s window replacement needs in Westgate generally fall into three buckets: the older sliding and single-hung lines, the more recent double-hung and casement series, and the fiberglass-frame units that share components with their door systems. Each has its own quirks when it comes to replacing parts.

The first thing to check is the label. Therma-Tru stamps a serial number and series code on the frame or sash, usually on the top or side edge. If that label has faded under the Florida sun, you can still identify the unit by measuring the visible glass width and height, then checking the corner joinery. Here’s a compatibility gotcha most owners don’t know: Therma-Tru window hardware changed substantially around 2018. The older series used a different balance shoe and pivot pin than the current lines, so a part that “looks right” may not seat properly. If you bring us the old part or a photo with measurements, we’ll tell you which generation you have before you spend a dollar.

When it comes to OEM versus aftermarket for Therma-Tru specifically, here’s our honest take. For pressure balances, tilt latches, and sash locks, a quality aftermarket equivalent is often indistinguishable from the factory part and costs 30 to 40 percent less. For weatherstripping and glazing beads, we lean OEM because the tolerances are tighter and the material is matched to Florida conditions. We stock both, and we’ll show you the difference on paper before we install anything.

Signs Your Therma-Tru Window Replacement Is Failing

• Draft you can feel from across the room. This almost always means the weatherstripping or the glazing bead has compressed past recovery. Westgate’s heat and humidity cycles accelerate this more than most homeowners expect. The fix is usually a new seal kit, not a whole window.
• Sash drops when you let go of it. Your balance springs or block-and-tackle balances are worn out. This is the most common Therma-Tru failure we see in Westgate, and it’s dangerous enough that we recommend you stop using the window until it’s fixed. A falling sash can break fingers.
• Lock won’t engage or pops open on its own. The keeper or the lock body has worn down or shifted out of alignment. Beyond the security issue, a window that won’t lock is quietly losing you air-conditioned air every hour of the day.
• Condensation between the glass panes. The seal on the insulated glass unit has failed and the desiccant is saturated. You can’t fix this from outside; the unit needs replacement. In Westgate’s humidity, it’ll fog up every afternoon once the seal goes.
• Tilt latch snaps off or refuses to release. The tilt latch is a sacrificial part, designed to wear out before the sash does. If one side fails, replace both sides at the same time. Replacing only the broken one leaves the other ready to go at the worst possible moment.

Replacement Cost & What’s Included

For a Therma-Tru window replacement in Westgate, here’s what you can expect to pay, installed:

• Balance replacement (pair): $140 to $260
• Tilt latch or lock replacement: $90 to $180
• Weatherstripping kit (full perimeter): $120 to $240
• Sash replacement (custom-ordered): $300 to $700
• Full window replacement (standard size): $600 to $1,200

What drives the range for Westgate homes is mostly sizing and age. Older units with non-standard dimensions need a custom sash, which adds lead time and cost. Every estimate we give includes parts, labor, disposal, and a written line-item breakdown. The price on the quote is the price on the invoice. No change orders, no “we found something else while we were in there.” We also stand behind the work with a workmanship warranty, and the parts themselves carry their manufacturer warranty. And if you have a written estimate from another company, bring it in. We’ll give you a free second opinion and, if we can’t beat it, we’ll tell you that too.

DIY or Call Us?

Some things are genuinely safe to check yourself. You can confirm which window is the problem, note the brand marks on the frame, and measure the sash dimensions. If you’re comfortable with a screwdriver, replacing a tilt latch or a lock striker is a fifteen-minute job. But balance springs, glazing beads, and anything involving removing the sash from the frame is where DIY goes sideways fast. These components are under constant tension, even when the window is closed. One wrong move and that sash can drop hard enough to injure you or damage the frame so badly you’re now buying a full replacement instead of a $200 repair.

If you’re in Westgate and you’re not sure which camp your repair falls into, call us at (561) 468-6136. We’ll tell you over the phone whether it’s something you can handle safely or something you should leave to us. No charge for the honesty.

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