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CGI Construction in Redwood City, CA | Elmstead Remodeling San Francisco
We provide independent CGI window and door service across Redwood City, from the 1950s tracts of Woodside Plaza to the coastal air of Redwood Shores. We’re not a manufacturer-authorized dealer, which means we’re free to recommend the fix that actually makes sense for your house, not the one a corporate program tells us to sell. The thing that makes CGI work different in Redwood City is the soil. Those adobe clay soils expand and contract through our wet winters and dry summers, and that movement shows up in window frames and door tracks before it shows up anywhere else. If you’re looking for someone who understands CGI products and Redwood City foundations in equal measure, call (831) 480-4497. Graham Stein, Owner at Elmstead Remodeling and a General Contractor in Redwood City, has spent the better part of three decades working on homes exactly like yours.

Why Redwood City Residents Choose Us for CGI Service

Most window companies in Redwood City know windows. Fewer know what happens when a CGI Classic Series sash binds in a rough opening that’s shifted because the slab underneath it settled three inches over sixty years. That’s the work we do every week. We’ve been called out to more Redwood City ranch-style and 1950s tract homes with failing CGI windows and doors than any other local outfit, so we know exactly how these products fail in this climate and what it takes to fix or replace them without a manufacturer’s authorization. Graham grew up in Los Angeles and learned the trade at Los Angeles Trade-Technical College, then spent nearly three decades managing crews across California. He writes out every cost before a single tool touches the floor, and he sets quiet hours so families aren’t chased out of their own homes during the workday. That’s the standard we bring to every CGI job in Redwood City.
We’re an independent CGI sales & service provider, not a factory program. That independence matters. When a 1958 CGI slider has a failed seal but the frame is still square, we’ll tell you the seal replacement is worth doing. When the frame is racked and the wall needs seismic reinforcement anyway, we’ll tell you replacement is the honest call. We use OEM CGI parts when available through independent supply channels to maintain warranty-like performance, but we don’t hesitate to use quality aftermarket replacement seals, rollers, or hardware when it’s the more cost-effective fix for a 30-year-old window. Families in Redwood City appreciate that we answer our own phones, show up in uniform, and put shoe covers on before we walk through the door. That’s the Cedarwell Care Promise, and it’s not optional on any job we run.
Styles & brands we work with







Common CGI Construction Problems We Solve in Redwood City
- Foggy or failed seals in CGI Estate Collection windows. Redwood City’s afternoon fog and day-to-night temperature swings put real stress on window seals. The desiccant inside the insulated glass unit breaks down faster in our humidity, and once that happens, moisture gets between the panes and the window looks permanently cloudy. Homeowners often think it’s a manufacturing defect. Usually it’s just age plus our specific microclimate.
- Sticking or misaligned CGI Classic Series sashes. The adobe clay soils under much of Redwood City expand in winter and shrink in summer. Over decades, that seasonal movement settles slabs and shifts rough openings. A window that opened fine when it was installed in 1962 now binds at the top corner. We see it constantly in Woodside Plaza and Redwood Shores.
- Rusted or seized rollers on CGI sliding glass doors. The coastal fog that rolls over Redwood City in the summer carries salt and moisture. That combination accelerates corrosion on the bottom track and door hardware. A slider that used to glide with one finger now takes two hands and a hip check. The rollers seize, the track pits, and eventually the door won’t move at all.
- Leaking caulking around CGI window perimeters. Mid-century ranch homes in Redwood City often still have their original stucco. Seasonal expansion and contraction opens hairline gaps in the caulk line around window frames, and those gaps let water into the wall system. By the time you see a water stain inside, the damage has usually been going on for months.
- Frames compromised by water intrusion. Once water gets behind CGI window frames in a Redwood City home, the framing lumber starts to soften. We’ve opened walls on 1950s ranch homes and found the king studs around an old window were doing almost nothing structurally. At that point, replacing the window isn’t enough. The rough opening has to be rebuilt before new fenestration goes in.
CGI Service in Redwood City: What Local Conditions Mean for Your Equipment
Here’s the piece most window companies won’t tell you about Redwood City: the R-1 zoning that covers much of our older residential areas allows substantial second-story additions, and homeowners are using that allowance constantly. But the 1950s-era foundations under those original ranch homes were never designed to carry a second story. That means any CGI window or door installation tied to an upstairs addition frequently requires first reinforcing the foundation and framing. We’re uniquely positioned to handle that coordination because we offer our Bathroom Remodeling in Redwood City and full-service remodeling, not window replacement alone. This is also why we ask questions about your long-term plans when you call about one window. If you’re thinking about adding a second story in five years, the window decision you make today should account for that. Tell me what the room needs to do, and we’ll figure out the rest from there. The soil, the fog, the zoning, the aging stock of postwar tract homes: those factors combine in Redwood City in a way they don’t in Menlo Park or San Carlos, and the result is a very specific set of CGI failure patterns we’ve learned to diagnose quickly.
CGI Models & Products We Service in Redwood City
We work on the full CGI residential line that shows up in Redwood City homes. The CGI Estate Collection impact windows are common in newer replacements and additions, especially as homeowners upgrade for coastal weather resistance. The CGI Classic Series aluminum windows are the ones we most often find in original 1950s and 1960s installations, and frankly, many of them have held up remarkably well given the salt air. We also service the CGI Contractor Series sliding glass doors and CGI Estate Collection hinged patio doors. Our parts approach depends on what makes sense. We use OEM CGI hardware, seals, and rollers through independent supply channels when the window justifies it. For a 35-year-old Classic Series unit where the original manufacturer’s part costs more than the window is worth, we’ll recommend a quality aftermarket replacement and tell you exactly what you’re getting. Our Redwood City service area coverage means we keep common CGI replacement parts available locally, which shortens turnaround when a door is stuck shut or a window won’t latch.
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AfterCGI Service Pricing in Redwood City

Window work in Redwood City carries a real range, because the condition of the opening matters as much as the product itself. Here’s what our CGI installation work typically runs:
| Service | Typical Price Range |
|---|---|
| Window Replacement | $4,500 – $15,000 |
| Impact Window Installation | $8,000 – $25,000 |
The wide span comes down to a few things: how many units you’re replacing, whether the rough openings need structural correction (common in Redwood City slab homes), whether you’re choosing CGI Estate Collection impact-rated glass versus standard Class Series, and whether the job is tied to a larger addition or seismic retrofit. A single window with a failed seal is a small job. A whole-house replacement on a 1950s tract home with foundation movement and original stucco is a different project entirely. You’ll get a written price before any work starts, always. No estimates that grow after the crew arrives. Call (831) 480-4497 and we’ll walk the house together and write it all down.
Serving Redwood City, CA - Our Local Coverage Area
We’re based in the Redwood City area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs – CGI Construction in Redwood City
Many 1990s CGI windows in Redwood City are still serviceable, especially if the frames are square and the only issue is a fogged seal or worn hardware. We can replace the insulated glass unit or the rollers without pulling the whole window, which usually costs a fraction of full replacement. But if the frame shows signs of water intrusion, or if the rough opening has shifted from slab settlement, replacement becomes the smarter long-term spend. We’ll tell you which camp your windows fall into before you spend a dollar. Call (831) 480-4497 and we’ll take a look.
Yes, in most cases. Redwood City requires permits for window replacement when the opening is being modified or enlarged, and for any work tied to structural changes. Straight swaps where the new unit fits the existing opening usually move through the process faster, but we pull the permit, schedule the inspection, and make sure it passes. We don’t ask you to handle paperwork, and we don’t do work that should have been permitted but wasn’t.
Yes, in most cases. CGI has used consistent bronze finish specifications for years, and we source matching frames through independent supply channels. There can be slight variation if your existing windows have faded after decades of Redwood City sun and fog exposure, so we’ll bring finish samples to the job walk and hold them against your existing units in natural light before you commit. That’s the kind of thing we like to get right the first time.
It can, but you’ll want to check with your insurer. Many carriers offer discounts for impact-rated windows in California, and CGI Estate Collection windows carry the ratings that insurers recognize. We can provide the product documentation your agent will need. The bigger benefit for most Redwood City homeowners is the noise reduction and the protection against flying debris during winter storms, but if a premium reduction is available, the paperwork is worth doing.
Both are possible, and Redwood City makes the answer more likely to be foundation than you’d think. Adobe clay soils settle, slabs shift, and door openings go slightly out of square. If the door binds on one side and aligns fine on the other, the issue is usually racking from the opening rather than the door itself. We’ll check the rollers, the track, and the squareness of the rough opening when we come out, and then give you a straight answer on what it’ll take to fix. Estimates are free. Call (831) 480-4497.
Service Areas Near Redwood City
We run CGI jobs throughout Redwood City and the surrounding Peninsula communities, including Menlo Park, San Carlos, and Woodside. We also have crews doing CGI service in Walnut Creek and CGI service in San Francisco. If you’re in Redwood City or any of the nearby neighborhoods, call us and we’ll schedule a walk-through.
Book Your CGI Service in Redwood City Today
Call (831) 480-4497 and we’ll set a time that works for your family. We’ll walk the house, look at the windows or doors in question, and write out a price before any work begins. Shoe covers at the door, drop cloths on the floors, and a photo of the clean-up before we leave.
Written by Graham Stein, Owner at Elmstead Remodeling San Francisco, serving Redwood City since 2005.












