CGI Window Replacement Nationwide

CGI Window Replacement: The San Francisco Owner’s Guide

CGI window replacement in San Francisco typically runs between $900 and $2,400 per opening installed, depending on the series, size, and whether you’re swapping the sash, the glass unit, or the full frame. We stock common CGI replacement parts on our trucks, and most swaps happen in a single visit once we’ve confirmed the model. You’ll usually notice the problem first as a window that no longer closes square, condensation trapped between the panes, or a latch that stopped biting months ago and has quietly let the marine air in.

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The telltale moment for most San Francisco homeowners is a draft that appears around the frame on foggy mornings, or a crank that turns without moving the sash. Sometimes it’s the sound: the dull clunk of a counterbalance letting go inside the track, which is an early sign the shoe or pivot bar needs attention before it scores the frame. None of these are cosmetic. A CGI window that has lost its seal or its balance is working against your heating bill and your security, and in a city where the fog tests every gasket, the fix is rarely a temporary one.

Which CGI Models This Applies To

Most CGI replacement work we do in San Francisco involves the Estate Collection, the Sentinel line, and the Classic series, all of which use similar extruded aluminum frames but different hardware and glazing stops. The compatibility gotcha: two CGI windows made in the same year can use entirely different balance assemblies depending on whether they were built for coastal wind-load requirements versus standard residential use. A window spec’d for hurricane-zone county is not the same as one spec’d for the Richmond or Sunset District, and the balance cartridge is often the first clue. The easiest way to identify what you have is to look at the sticker on the top edge of the sash. It will show the series, the glass make-up, and a date code. If the sticker is gone, we measure the visible glass, frame depth, and the width of the sash profile, then match it against known CGI cut sheets.

For hardware and balances, we prefer OEM CGI parts when they’re available and reasonably priced. For certain discontinued trim and glazing beads, quality aftermarket equivalents are often the only realistic option, and we’re upfront about when that’s the case. Lightwell Windows San Francisco is an independent service provider and not affiliated with CGI, but we’ve handled enough of their product across the city to know which aftermarket parts fit cleanly and which ones never will.

Signs Your CGI Window Replacement Is Failing

• Condensation between the panes. The desiccant inside the sealed glass unit has saturated and the inert gas fill has escaped, which means the insulated glass unit has failed. It cannot be wiped away, and it will not dry out. The glass unit needs replacing, not the whole window.
• The sash drops when you let go, or won’t stay open. The block-and-tackle or spiral balance inside the track has lost tension or snapped. On heavier CGI sashes, this is a two-person replacement, because the sash can weigh more than forty pounds.
• You can see daylight or feel air at the meeting rail. The interlock has worn or the weatherstripping has compressed past its useful life. In San Francisco’s windy corridors, this gets worse quickly and lets salt-laden fog into the frame, which accelerates corrosion on the hardware.
• The handle turns but nothing moves. The crank’s gear is stripped or the operator arm has separated from the sash bracket. This happens often on casement windows that get cranked open against a strong afternoon wind off the Pacific.
• The window locks, but the lock feels loose or misaligned. The keeper on the frame has shifted, or the cam on the sash has worn. It’s the kind of thing that seems minor until a window that looks locked is actually only resting in place.

Replacement Cost & What’s Included

Here’s what CGI replacement work typically costs in San Francisco:

• Glass unit only: $550 – $1,100 per opening, installed.
• Balance, pivot, or operator hardware replacement: $180 – $525 per opening, installed.
• Full sash replacement: $900 – $1,800 per opening, installed.
• Complete frame replacement: $1,400 – $2,400 per opening, installed.

You’ll notice we put the price in writing before any work starts. That’s the standing rule, not a courtesy. The written quote covers the part, the labor, the disposal of the old unit, and the clean-up, and we do not hand over a different number at the end. Our work carries the 365-Day Done Right Promise: if the finished replacement is not right, we make it right, no debate, no countdown. Every quote includes a line item for what we’ll protect inside your home, because in a San Francisco Victorian with original floors, the drop cloths and shoe covers are not optional.

DIY or Call Us?

This is the point where we’d rather be honest than encouraging. A failed glass unit is not a safe DIY job on a CGI window: the sash is heavy, the glass is tempered or laminated, and releasing the glazing bead without the right flat-blade tools will chip the frame. What you can safely do is check the sticker on the sash, measure the visible glass, and take a photo of the balance shoe or the operator arm so we can confirm the part before we arrive. That saves time, and it gives us a head start on pricing.

If the balance has let go, please do not try to force the sash up and out of the track. A CGI sash under tension can drop hard, and the track edges are sharp enough to open a hand. That’s the one warning we give clearly and early. If you’re in the Sunset or the Richmond and the window has been fighting the fog for years, call us at (831) 480-4124 and we’ll take a look. Keith Yamada and our crew read the existing frame carefully before a single panel comes off the wall. Measure it until it’s boring, then cut once.

FAQs

Get a Free Estimate

If you have a CGI window that is fogged, loose, or fighting the San Francisco wind, call Lightwell Windows San Francisco at (831) 480-4124. We’ll schedule a time to look at the window, confirm the part, and put a written price in your hand before any work begins. You’ll know exactly what will be protected inside your home, exactly what the install covers, and exactly what you’ll pay. That’s how we operate, and it has been since 2010.

Written by Keith Yamada, Owner, Lightwell Windows San Francisco at Lightwell Windows San Francisco, serving San Francisco and nearby areas.