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Get your free estimateCGI Window Replacement: The San Antonio Owner’s Guide
If you have a CGI window that’s fogged, cracked, or simply stopped operating the way it should, we can replace it. We stock CGI-compatible replacement sashes, balances, rollers, and hardware across the most common series, and typical installed replacement runs between $180 and $620 per opening in San Antonio depending on glass package, frame condition, and whether we’re swapping a sash or the full unit. Most single-window replacements are done in one visit once the part is confirmed.
Here’s how owners usually find us: a window gets harder to lift, a lock stops catching, or condensation shows up between the panes that no amount of wiping removes. Sometimes it’s the west-facing window in the guest room that suddenly won’t stay up, and sometimes it’s a hairline crack from a weed trimmer that finally spidered across the glass. Whatever the entry point, the fix starts with identifying exactly which CGI window you have. That’s the part most people skip, and it’s the part that matters most.
Which CGI Models This Applies To
CGI builds several distinct window lines, and while they share a design philosophy, the parts do not always interchange. The most common we see in San Antonio are the CGI Estate Series, the CGI Classic Series, and the CGI Sentinel line, which is the impact-rated product many homeowners along the I-10 corridor and in areas with newer building codes have specified. Each series uses different balance systems and, in some cases, different sash profiles, so the first step is never “buy a generic part.” It’s “read the label.”
Every CGI window we’ve touched has a small identification sticker or laser etching on the frame or sash, usually on the top or side rail. It lists the series, the glass makeup, and a manufacturing date code. If the sticker is gone or faded, we measure the visible glass, the sash thickness, and the balance shoe profile to match the window. Here’s a compatibility gotcha most people don’t know: CGI’s impact-rated units (Sentinel) use a heavier sash than the non-impact lines, which means a balance from an Estate window will not hold a Sentinel sash safely. Mixing them creates a window that slams or drifts, and in a house with kids, that’s exactly the kind of thing you don’t want to find out by accident. When we quote a replacement, we confirm the series before we order anything.
On the OEM versus aftermarket question: for CGI specifically, there are quality aftermarket balances and rollers that perform well and cost less than the factory part, particularly for the non-impact lines where the hardware is more standardized. For the impact-rated glass and frames, we lean OEM or exact-match equivalents, because the structural ratings that make those windows what they are depend on the original engineering. We’ll tell you plainly which route makes sense for your window and why, and the price difference is written down before we start.
Styles & brands we work with







Signs Your CGI Window Replacement Is Failing
- The sash won’t stay up, or it drops when you let go. The balance system has lost tension. In San Antonio, the spring inside the balance works against heat and dust year-round, and once it lets go, the window becomes a two-hand operation and a pinched-finger risk for small hands.
- Condensation or fog between the panes that never clears. The insulated glass seal has failed. This is not a cleaning issue; it’s a failure of the sealant bond, and it means the argon or krypton gas fill is gone and the window’s insulating value has dropped. In humid San Antonio mornings, a failed seal shows up instantly.
- The lock or latch no longer lines up. Over time, the sash settles or the keeper shifts, and the lock mechanism stops engaging cleanly. It feels like a minor annoyance, but a window that won’t lock is a window that’s open to whoever notices it first.
- You can feel air moving around the closed window, or dust collects unusually fast on the sill. The weatherstripping has compressed or the sash has drifted out of square. In San Antonio, this is most obvious in the bedroom that catches the evening wind, and it shows up on the utility bill before anywhere else.
- The window is harder to open than it used to be. The rollers or pivot bars are worn or gummed with years of dust and humidity. Forcing a stuck window usually breaks the hardware it was holding onto, and then a $40 roller becomes a $300 sash replacement.
See the difference
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After
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Before
AfterReplacement Cost & What’s Included
For San Antonio homeowners, here’s the pricing picture we quote most often. A single balance replacement runs $180 to $260 installed. A sash replacement with new insulated glass runs $350 to $620 installed, depending on glass package and whether it’s a standard or impact-rated unit. Full frame-and-sash replacement when the frame itself has warped or rotted runs higher and is quoted on inspection, because no one should price a rotten frame over the phone.
Every quote includes the part, the labor, disposal of the old unit, and a written price before any work starts. That’s the Cedarwell Care Promise at work: no invoice surprise at the end of the day, no “while we were in there” additions. If the finished replacement is not right, the 365-Day Done Right Promise means we make it right.
DIY or Call Us?
You can safely check a few things before picking up the phone: confirm the window’s series from the sticker, note exactly what’s failing, and take a photo of the balance shoe if the window is already loose. That helps us quote accurately. What we don’t recommend is attempting a balance replacement yourself, especially on heavier impact units. Those springs hold real tension, and when they release wrong, they can break fingers or send a sash into the glass beside it. We carry the proper tools, and we’ve done enough of these that the danger is managed rather than guessed at.
If the window is cracked, fogged, or fighting you, call us at (325) 420-4173. We’ll match the part, quote the job in writing, and fix it without leaving a mess behind.
FAQs
In San Antonio’s heat and humidity, a CGI window’s glass and frame typically last 15 to 25 years, but the moving hardware, balances, rollers, and locks, usually needs attention somewhere between years 8 and 12. The west-facing windows go first because the afternoon sun in San Antonio is relentless on seals and springs. Call (325) 420-4173 and we’ll tell you if yours is a normal wear item or a sign of something bigger.
Yes, in most cases a failed balance, roller, or lock can be replaced without changing the glass or frame, and that’s the cheaper route when the seals are still intact. If the glass is fogged between panes, the insulated unit itself has to be replaced, no repair route exists for a failed seal. Call (325) 420-4173 for an honest read on which one you’re looking at.
For a sash or hardware swap on a confirmed model, the work usually takes one to two hours per opening, and we clean up before we leave. If we’re replacing a full frame unit, expect a half day per window with proper sealing and trim. We’ll give you the timeline in writing before starting.
We keep common CGI balances, rollers, and locks on the truck for the Estate and Classic series, and Sentinel impact hardware is usually available within a few days from our supplier network. Keith Yamada will tell you at the estimate whether your part is an on-hand item or a short order, so there’s no mystery about the schedule.
Written by Keith Yamada, Owner, Lightwell Windows San Antonio at Lightwell Windows San Antonio, serving San Antonio and nearby areas.
Six Reasons Homeowners Choose Lightwell Windows San Antonio
Laminated glass and reinforced frames hold up to wind-driven rain, hail and flying debris, so your openings stay sealed when the weather turns.
Low-E insulated impact glass from our manufacturer lines commonly cuts monthly cooling bills 20-30%.
Laminated impact glass shuts out up to 40% of outside noise - traffic, neighbors, weather.
Monitoring services run $30-90 a month. Laminated impact glass resists forced entry around the clock, with no subscription.
Tighter seals and insulated glass even out hot and cold rooms and stop the drafts at the frame.
A full impact package upgrades curb appeal, buyer confidence and appraised value in one project.