Therma-Tru Window Installation Nationwide | Winslow Windows & Doors

Therma-Tru Window Installation: The Fountainebleau Owner’s Guide

Therma-Tru window installation in Fountainebleau typically runs $95-$185 per window for labor when the opening is sound and the unit drops in clean, with full-frame installation starting around $340 per window when rot or water damage is present. We keep the most common Therma-Tru window hardware, weatherstripping, and balance assemblies on our trucks, so most Fountainebleau calls are finished the same day we arrive. What usually brings a homeowner to this page is a window that won’t stay open, a sash that sticks when the afternoon humidity spikes, or a draft you can feel standing three feet away in December when the temperature finally drops below 60.

Call (727) 620-6983

Which Therma-Tru Models This Applies To

Therma-Tru is primarily known for entry doors, but they market vinyl windows under their name through regional suppliers and we’ve installed and serviced them across Fountainebleau, Westchester, and Sweetwater since our first year. The compatibility gotcha most homeowners miss is this: Therma-Tru window sashes from the Classic Craft line and their SlimLine series are not interchangeable, even when both measure 36 by 48. The balance shoe profile and pivot pin depth differ by roughly 3/16 inch. It looks trivial on a tape measure, but it’s the difference between a window that glides and one that binds. Identifying the right part starts with the sticker on the top edge of the sash or the inside of the frame channel. It lists the series, glass package, and a production date code. If that sticker’s gone, we measure the glass thickness, the balance tube diameter, and the exact shoe profile. We’re an independent service provider and not affiliated with Therma-Tru, which means we can be honest about whether an OEM part is worth the wait or a quality aftermarket equivalent from our supplier network does the same job for less. For balance assemblies and weatherstripping, aftermarket is usually identical in spec. For anything with the Therma-Tru logo molded into it, we order OEM so the match is exact.

Signs Your Therma-Tru Window Installation Is Failing

• The upper sash drops when you let go. This is the balance assembly losing tension. In Fountainebleau’s salt-adjacent air, the spring inside the balance tube corrodes faster than manufacturers expect, especially on windows facing east toward the Everglades run-off breezes.
• You feel a draft even when the window is locked. Therma-Tru’s compression weatherstripping flattens permanently after 5 to 7 years of direct afternoon sun. Once it loses its memory, the lock’s cam pressure can’t pull the sash tight against the frame.
• Condensation builds between the panes. That’s a failed seal on the insulated glass unit. We see it most often on south-facing walls in Fountainebleau where the glass bakes from noon until dusk, then gets hit by air conditioning on the inside. The thermal stress eventually cracks the sealant bead.
• The sash scrapes or sticks when you open it. Usually a worn pivot pin or a balance shoe that’s cracked at the tongue. DIYers often force it, which snaps the shoe and drops the sash entirely.
• The lock won’t engage without lifting the sash. This points to the sash sliding off its original plane, usually because the bottom rail has warped slightly or the hinge-side shim pack has settled. You’re not imagining it, and tightening the screws won’t fix it.

Replacement Cost & What’s Included

Labor to replace a Therma-Tru balance assembly or weatherstripping runs $95-$185 per window in Fountainebleau, and most single-window jobs are done in under an hour. If the sash itself needs replacing, you’re looking at $240-$410 per window for the part and labor together. Full-frame installation for a standard Therma-Tru opening starts around $340 and climbs if we find rotted wood at the sill or jamb, which we do often in Fountainebleau homes built in the 1960s and 70s. Every quote we write is a fixed line-item price before we start, no change orders, no surprise add-ons when we open the wall. The work is covered by the Winslow Done Right Promise: if it’s not done right, we make it right. That’s Ed Winslow’s name on the door, and it’s Ed’s name on every job we do.

DIY or Call Us?

Window hardware replacement doesn’t carry the same injury risk as high-tension garage door springs or electrical panel work, but it has its own version: a double-hung sash with a live balance spring can release suddenly if you pull the pivot pins without securing it, and you’ll be holding 25 pounds of glass with nothing but reflex. If you want to check things yourself first, confirm the sticker codes I mentioned above and look for visible cracking on the balance shoes. Beyond that, call (727) 620-6983 and let a trained tech do it. We’ll tell you over the phone whether it’s a $95 balance or a full sash, and you won’t pay a trip charge if you’re in our home county.

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