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ES Windows Construction in Cupertino, CA | San Bernardino Contractors
We provide independent ES Windows construction service across Cupertino, from original 1960s aluminum slider rebuilds to new vinyl retrofit installs on two-story additions. What makes our ES Windows work here different is simple: most Cupertino window decisions happen mid-teardown, when a surviving wall, an unpermitted addition, or a Title 24 envelope trigger changes everything about the opening. Call (855) 473-5620 to schedule a free estimate on your ES Windows project.
You’ll find our full ES Windows sales & service page useful if you’re still weighing repair against replacement. We work across Cupertino service area ZIP codes 95014 and 95015, and we know the product’s quirks from the rough opening outward.
Why Cupertino Residents Choose Us for ES Windows Service
Ruben Castillo grew up watching his uncle reroof houses and frame garages on a shoestring budget in San Bernardino’s Westside, then got serious about load paths and plan reading at San Bernardino Valley College. That hands-on education shapes how we approach Home Remodeling – Cupertino ES Windows work: cut corners on flashing, and the winter rain finds the wall cavity. Set the sill wrong, and the sash racks. There’s no shortcut that survives a wet Cupertino winter.
We’ve spent years working inside ES Windows openings on Cupertino rebuilds and additions, resizing, re-flashing, and re-glazing them, as a General Contractor – Cupertino. Homeowners here recognize brand names and expect a contractor who can speak to them fluently. So when you ask whether a 1968 ES Windows aluminum slider in a surviving ranch wall is worth keeping, we give you a straight answer: sometimes yes, with new glass, gaskets, and a corrected sill pan. Sometimes no, because the new Title 24 envelope or a moved foundation has already made replacement the honest call. We quote and install to Cupertino’s plan-check standards, not a manufacturer’s program.
Styles & brands we work with
Common ES Windows Construction Problems We Solve in Cupertino
- Fogged IGU seals on original aluminum units. Decades of long dry summers and intense UV exposure hit west and south elevations hardest. When the seal fails, the glass fogs permanently. We replace the IGU or the whole sash, depending on frame condition.
- Galvanized-steel and early aluminum frames set without sill pans. This is a recurring finding on partial-demolition rebuilds in 95014. The original installer relied on stucco and hope. Winter rain works its way into the wall cavity before it ever finds a weep hole. We pull the units, re-frame, and install proper sill pans.
- Frame racking and out-of-square sash travel. Cupertino’s 1950s-1970s ranch homes sit on shallow slab foundations that have settled and shifted over fifty-plus years. When the slab moves, the window frame moves with it. We correct the rough opening before we set new glass.
- Corrosion and pitting at fasteners and sill corners. Original ES Windows aluminum frames sitting against stucco with no backer or flashing detail corrode where the two materials meet. We replace the corroded sections and add proper separation.
- Hardened glazing gaskets and failed weatherstripping. After years of dry heat, the gaskets turn brittle and the sash loses its seal. Air leaks, drafts, and noise intrusion follow. We re-glaze and re-weatherstrip sound frames, or replace the units entirely when the extrusion is too far gone.
ES Windows Service in Cupertino: What Local Conditions Mean for Your Equipment
Cupertino’s teardown-and-rebuild cycle means our ES Windows work here often lands on a wall that is about to be demolished anyway. The tract homes built for early Apple and defense-aerospace employees in the 1960s now sit on lots worth more than the houses. So the typical Cupertino remodel is really a partial demolition. The real decision is rarely whether to replace windows. It’s whether new glazing goes into a surviving wall or a whole new opening, and whether unpermitted additions uncovered during the rebuild have to be brought into compliance before the window permit is signed. On a teardown-and-rebuild job off a ranch-lot street in the 95014 flats, we opened up the rear wall on the surviving single-story wing and found original ES Windows aluminum sliders set into stucco with no sill pan and a shipping-tape-era flashing detail, plus an unpermitted enclosed patio several feet behind it. We pulled the units, re-framed and re-flashed the openings with proper sill pans, sized new ES Windows sliders to the corrected rough openings, and sequenced the install so the glazing and Title 24 documentation went to the city in the same permit package as the addition. That’s how window work actually happens in Cupertino.
ES Windows Models & Products We Service in Cupertino
We work on the full range of ES Windows product lines found across Cupertino’s housing stock. That includes the aluminum single-hung and horizontal slider units from the 1960s-80s residential line, the vinyl single-hung and slider retrofit units used in later Cupertino remodels, aluminum sliding-glass door assemblies in family-room and patio openings, and fixed picture and transom units above sliders in two-story additions. For parts, we match original ES Windows extrusions and profile dimensions where a like-for-like replacement keeps the opening and passes plan check. We use quality aftermarket glazing, gaskets, and hardware where OEM parts are discontinued or slow to source. We’ll repair a sound frame with new glass and weatherstripping, but we tell owners plainly when a Cupertino rebuild’s new Title 24 envelope, changed rough opening, or failed sill detail means replacement is the honest call. If it’s not built right the first time, you’re just paying for it twice.
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AfterES Windows Service Pricing in Cupertino
ES Windows construction pricing in Cupertino varies based on scope. A straightforward window replacement on a surviving wall runs less than a full impact-rated install on a new two-story addition. Here’s the range:
| Service | Price Range |
|---|---|
| Window Replacement | $4,500 – $15,000 |
| Impact Window Installation | $8,000 – $25,000 |
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
What drives cost in Cupertino specifically is whether the rough openings need re-framing to fix settling damage, whether unpermitted work has to be corrected before permit sign-off, and whether Title 24 compliance pushes you into higher-efficiency glazing. Free estimates include a walk-through of every opening and a written line-item quote. Call (855) 473-5620 for an exact number on your project.
Serving Cupertino, CA — Our Local Coverage Area
We’re based in the Cupertino area and know this community well, and we also provide ES Windows service in Saratoga. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – ES Windows Construction in Cupertino
It depends on wall condition, foundation movement, and whether the surviving walls meet current Title 24 envelope requirements. We’ve kept original ES Windows frames in sound walls by re-glazing and re-flashing. We’ve also had to pull them because fifty years of slab settlement left the openings out of square and the extrusion too corroded. We’ll tell you which way it goes after we open up the wall and inspect. Call (855) 473-5620 to schedule a free walk-through.
It can. Cupertino’s building department will not sign off on new window work in a wall connected to unpermitted square footage until that addition is either brought into compliance or removed. We’ve managed this exact situation on teardown-and-rebuild jobs. The window permit and the addition compliance go through as one package. Call (855) 473-5620 and we’ll walk you through the sequencing.
Rarely without some re-framing. Original ES Windows aluminum units from the 1960s were set to rough openings that have since shifted with slab movement, and the dimensions don’t always match today’s standard sizing. We re-frame openings to square, install proper sill pans, and size the new units to the corrected opening. That’s the difference between a window that operates and one that binds on day one. Call (855) 473-5620 for a free estimate on your specific openings.
Hillside lots near the foothills see more drainage and grading problems during wet winters, which means we time exterior work for dry-season windows whenever possible. Setting windows into wet wall cavities or before drainage corrections are done is how you get mold and rot. We sequence the work so the glazing goes in after the waterproofing and drainage are correct. Call (855) 473-5620 to talk about your lot’s specific conditions.
No. We’re an independent contractor. We don’t claim any authorization, partnership, or warranty endorsement by ES Windows. What we offer is years of hands-on experience installing, repairing, and replacing ES Windows units in Cupertino homes, quoted and installed to the city’s plan-check standards. Call (855) 473-5620 for a free estimate.
Service Areas Near Cupertino
We serve Cupertino and the surrounding Silicon Valley communities. If you’re nearby, see our ES Windows service in Sunnyvale page. For the Los Altos foothills side, see ES Windows service in Loyola. We also take on projects in Saratoga, Los Altos, and west San Jose.
Book Your ES Windows Service in Cupertino Today
Whether you’re keeping original ES Windows units in a surviving wall or starting fresh on a full rebuild, we’ll give you a straight answer and a written line-item quote. Call (855) 473-5620 to schedule your free estimate, or reach out through our site. We work from the roof down to the pavers, and from the rough opening outward.
Written by Ruben Castillo, Owner at San Bernardino Contractors, serving Cupertino’s teardown-and-rebuild window work with straight answers and correct flashing.