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CGI Construction in Sunnyvale, CA | Spruce Contractors
We handle CGI window and door service across Sunnyvale as an independent contractor, not a factory-authorized dealer. Our crew has installed, flashed, and repaired CGI aluminum and hybrid systems in Eichler-era post-and-beam homes and new infill builds throughout 94085, 94086, 94087, and 94088 for years. The difference here is that we know how Sunnyvale’s specific housing stock and permit process interact with CGI’s product lines, and we plan the work accordingly. Call (877) 265-5771 for a free estimate on window replacement, impact installation, or a full kitchen remodel that includes new glazing.
Why Sunnyvale Residents Choose Us for CGI Service
CGI builds high-performance sliding, casement, and multi-slide patio door systems, and we have worked with those exact units long enough to know their failure points before they show up. Nate Calloway grew up in Hillsborough and cut his teeth on construction technology at College of San Mateo, and the crew has spent years in the field from foundation work to full custom builds across San Mateo County. What that means for Sunnyvale homeowners is simple: we do not guess at sill pan depths, we do not cut corners on flashing, and we do not blame the product when the real problem was the opening.
We also carry strong familiarity with CGI sales & service practices across the Bay Area, which gives us a read on what holds up in this climate and what fails early. We are independent, so our recommendation is based on your house, your opening, and your exposure, not a dealer incentive.
Styles & brands we work with
Common CGI Construction Problems We Solve in Sunnyvale
These are the issues we see repeatedly on CGI windows and doors across Sunnyvale’s older tracts and newer builds:
- Water intrusion at sill pans and sill-to-jamb joints. Eichler-style post-and-beam walls in 94086 and 94087 typically offer very little wall depth to flash properly. When CGI sliders go into those shallow openings without a stepped pan or back dam, the first real winter rain finds its way to the interior.
- Clogged weeping holes and track drainage. Sunnyvale’s long dry summers produce dust and pollen that settle into CGI slider tracks. Weeping holes plug up, and when the rain finally comes, water backs up into the track and spills over the interior sill. We clean and clear the drainage paths, then verify the sill pan slopes outward.
- Thermal bridging and condensation on all-aluminum frames. Unshaded west-facing openings in Sunnyvale run hot for six months straight. All-aluminum CGI frames conduct that heat and can also sweat during cool mornings. Sealant and glazing gaskets degrade faster on those exposures. We re-seal and re-glaze where the frame is still sound.
- Failed rollers and binding on multi-slide systems. Radiant-heated concrete slabs in older Sunnyvale homes were often poured slightly out of level. When a CGI multi-slide goes into an opening without first verifying the header and slab, the panels start dragging, rollers wear out, and frames go out of square. We address the opening before we re-roller the door.
- Frame and extrusion fatigue on older single-pane CGI units. Some 1960s and 1970s units are still holding on, but the extrusion and glazing have reached the end of their serviceable life. We will re-glaze and re-seal when the frame is sound, and tell you straight when replacement is the smarter spend.
CGI Service in Sunnyvale: What Local Conditions Mean for Your Equipment
Sunnyvale’s own One-Stop Permit Center and the city’s all-electric reach code have changed what a window or patio door swap actually involves. On an older Eichler-style home in 94086 or 94087, swapping a set of tired aluminum sliders for new CGI units is often the moment the city asks about electrification and envelope performance. A homeowner who only wanted new windows suddenly hears about heat pumps, panel capacity, and EV-ready wiring. We sequence the glazing and flashing scope to clear that permit conversation, so the window work is not sitting in limbo while the city questions the gas line to the kitchen.
That is a Sunnyvale-specific reality. Go to a neighboring city and the permit conversation may stay focused on the window itself. Here, a CGI installation can become the entry point to a broader compliance path, and we have learned to plan for that before we pull the old unit out.
On a 1950s post-and-beam ranch off the Eichler-style tracts in 94087, our crew pulled a set of tired aluminum sliders and a failing patio door and set new CGI multi-slide and casement units into openings with almost no wall depth to work with. We fabricated stepped sill pans and back-dammed the flashing because the radiant slab sat slightly off level, re-rolled and re-gasketed the multi-slide so it tracked clean, and the owner now has a patio door that drains and seals through the winter rain instead of weeping onto the slab.
CGI Models & Products We Service in Sunnyvale
We work on the full CGI aluminum and hybrid range: Elite/Series aluminum sliding windows and doors, casement and awning aluminum windows, multi-slide and lift-slide patio door systems, and hybrid aluminum-clad window lines. Parts sourcing follows one rule: if the frame and panel call for a factory-correct fit, we use CGI OEM rollers, gaskets, glazing seals, and handles. Where aftermarket hardware matches the extrusion profile and will not compromise the unit’s water performance, we will use it and tell you why. We stock common CGI roller sets, gaskets, and sill-pan flashing components locally to keep Sunnyvale turnaround short.
See the difference
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After
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After
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AfterCGI Service Pricing in Sunnyvale
| Service | Typical Range |
|---|---|
| Window Replacement (CGI aluminum/hybrid units) | $4,500 – $15,000 |
| Impact Window Installation | $8,000 – $25,000 |
| Kitchen Remodel (with glazing/door openings) | $14,000 – $45,000 |
A free estimate includes a look at the openings, the flashing conditions, and the slab or header situation, plus a line-item scope so you see exactly what the job requires. Call (877) 265-5771 and we will walk the property with you.
Serving Sunnyvale, CA — Our Local Coverage Area
We’re a Sunnyvale General Contractor 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 Sunnyvale
Most of the time this is a drainage and flashing failure, not a door failure. The weeping holes are likely clogged or the sill pan was never sloped correctly in the first place. We clear the drainage path, re-set the sill pan with a back dam where the opening allows, and re-seal the sill-to-jamb joints. If the frame is sound, repair is usually possible. Call (877) 265-5771 for an exact reading.
Yes, often it does. Through the One-Stop Permit Center, a window or patio door replacement on an older home can open an electrification conversation about the gas appliances and panel capacity. We sequence the window scope to clear that permit path cleanly, so you are not stuck with a project half-permitted.
All-aluminum frames do conduct more heat than hybrid or thermally broken options, and west-facing openings in Cupertino and Sunnyvale take the brunt of the afternoon sun. Condensation happens when the indoor humidity is high and the frame stays cold. Thermal breaks and proper glazing selection reduce both problems, and a hybrid line may make more sense for unshaded west walls. We will show you the difference before you commit.
We have done it multiple times across 94087, including on a 1950s ranch where the wall depth was barely enough for a standard sill. Stepped sill pans, back-dammed flashing, and careful header verification make it work. The slab must be checked for level first, because a multi-slide will not track properly on a slab that runs out even half an inch over the opening width.
Almost always a header or slab that was never verified before the unit went in. Radiant-heated slabs in older Loyola and Sunnyvale homes are often slightly out of level, and that transfer put stress on the rollers until they fail. We re-roll, re-level, and re-square, then set the panels to track clean. Call (877) 265-5771 and we will tell you whether it is rollers, frame, or slab.
Service Areas Near Sunnyvale
We also run CGI service calls in Sunnyvale service area neighborhoods and the surrounding communities. Our crew covers CGI service in Mountain View for Eichler tract homes that share the same post-and-beam conditions, plus CGI service in Los Altos Hills where hillside exposure and larger glazing packages change the conversation entirely. We also serve Santa Cruz, Capitola, Soquel, and the broader Silicon Valley corridor.
Book Your CGI Service in Sunnyvale Today
If your CGI windows or doors are leaking, binding, or just wearing out, call (877) 265-5771 for a free estimate. We will inspect the openings, check the flashing and drainage, and give you a line-item scope. Good work doesn’t need a lot of explaining – you can see it.
Written by Nate Calloway, Owner at Spruce Contractors, serving Santa Clara, Sunnyvale and the surrounding Bay Area.