CWS Window Replacement Nationwide

CWS Window Replacement: The San Antonio Owner’s Guide

We stock and install CWS-compatible window replacement parts and full sashes across San Antonio, with most single-window replacements running between $450 and $1,400 installed depending on the series, glass package, and frame condition. When we roll up to a home in Alamo Heights or Stone Oak, it’s usually because a homeowner noticed a crack spreading, a sash that won’t stay up, or condensation between the panes that won’t quit. The quicker you catch a failing CWS part, the cheaper the fix usually is. We carry common CWS hardware on the truck, so many replacements are done in a single visit.

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Which CWS Models This Applies To

CWS built windows across several series lines over the years, and the replacement part you need depends on the series stamped on the glass or frame, not just the rough opening size. The most common CWS window lines we see in San Antonio are the 3000 and 4000 aluminum series, plus the 3200 single-hung and 3600 horizontal slider lines. The easiest way to identify yours is to look at the corner of the glass for an etched manufacturer mark, or check the hinge side of the frame for a white or silver sticker with a series number and manufacturing date. If that sticker has faded in the Texas sun, we can match the part by measuring the glass unit thickness, the frame channel depth, and the hardware screw spacing.

Here’s the CWS-specific gotcha most people miss: CWS changed their balance shoe and pivot bar design around 2015. A pre-2015 CWS window will not accept the newer balance shoe without swapping the pivot bar too. It’s a $20 part difference, but if you buy online without checking the date code, you’ll end up with hardware that binds or falls out. We always ask for a photo of the balance shoe or the sticker before we head out. As an independent San Antonio service provider, we’re not affiliated with CWS, but we’ve been matching their parts correctly for years, and we keep OEM and quality aftermarket options side by side so you can pick based on price and lead time. When OEM parts are discontinued or backordered, a good aftermarket balance or sash lock from a reputable supplier usually performs just as well and saves you two to three weeks of waiting.

Signs Your CWS Window Replacement Is Failing

• The sash drops hard when you try to close it. This almost always means the balance shoe or tension spring inside the outer frame has worn out. In San Antonio’s heat, the internal nylon parts get brittle faster than the metal, and a dropped sash is the first tell.
• Condensation or fogging between the two panes of glass. That’s a failed insulated glass unit, or IGU. The seal around the spacer bar has let go, and once humid Texas air gets inside the unit, no amount of cleaning fixes it. You replace the glass, not the whole window.
• You have to lift, shimmy, or curse at the window to get it to lock. CWS locks and keepers are made of die-cast zinc on many models, and after a few years of forced operation, the keeper slots round out. The lock still looks fine, but it can’t grab anymore.
• A hairline crack that grows a little every month. Impact-rated CWS glass is laminated and will crack but not shatter, which is exactly what it’s supposed to do. But once that crack started, the glass unit is structurally compromised and needs replacement before the next hail season.
• You can feel air moving around the frame on a windy day. This usually points to failed weatherstripping or a sagged sash, but on CWS windows installed before about 2010, it can also mean the corner keys in the frame have separated. That’s a frame repair, not just a seal replacement.

Replacement Cost & What’s Included

In San Antonio, expect these installed price ranges for common CWS window replacements:

The spread comes down to glass type. A standard clear IGU in a common CWS size runs on the low end. A laminated impact-rated unit or a low-E coated unit with argon fill runs higher, and the larger the glass area, the more the unit costs. Every quote we give includes parts, labor, haul-away of the old part, and a written price before anything starts. That price doesn’t change once we’re on the wall. The work itself is covered by our 365-Day Done Right Promise, parts and labor, in writing. If it fails within a year, we come back and make it right at no charge. Sean Mackey has been pretty blunt about this from day one: if the numbers don’t make sense on paper, they won’t make sense on your wall either.

DIY or Call Us?

Let’s be straight about what’s safe and what isn’t. Replacing a sash lock or keeper is a one-screw job most homeowners can do in ten minutes with a driver and the right part. Cleaning the track and checking weatherstripping is free and worth doing twice a year in San Antonio, because dust and pollen build up fast. But changing a balance shoe, replacing a pivot bar, or swapping a glass unit is not a casual Saturday project. Balance shoes are under tension, and a slipped tool on a tensioned spring can snap back hard enough to crack a finger or the glass. CWS sashes are heavy, and a dropped IGU is dangerous to you and destructive to whatever it hits. We’d rather you call us at (903) 488-7019 before you get into a repair that goes sideways. The estimate is free, and we’ll tell you over the phone whether it’s a simple fix or something that needs a service visit.

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