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ES Windows Construction in Montclair, CA | Workshop Contractors
We provide independent ES Windows construction service across Montclair, CA, from full window replacement to impact window installation and window work tied to home additions. The one thing that makes our ES Windows work here different: Montclair is a built-out 1950s city, so nearly every window job we touch sits inside a postwar tract wall, a converted garage, or an ADU addition, and we plan for that from the first measurement. Call (844) 384-3361 to talk through your project.
Workshop Contractors is an independent general contractor, not an ES Windows-authorized dealer, and not tied to the manufacturer. That matters because we give you an honest read on whether a sash, a sill pan, or the rough opening itself is the real problem. We serve the 91763 ZIP and the surrounding Pomona Valley. Noel Figueroa, our owner, grew up in the Vineyard neighborhood of Ontario and learned framing from the same generation of tradesmen who built half the houses on his street, so he is not guessing at mid-century construction. We also offer ES Windows service in Ontario.
Why Montclair Residents Choose Us for ES Windows Service
ES Windows service in Upland is nearby, but Montclair homeowners call us because we know how ES Windows units behave inside a 1950s stucco-over-wood-frame wall. That is a specific kind of wall. The studs are old growth, the stucco is thick, and the original flashing was often minimal. When an ES Windows slider or single-hung fails in that wall, the fix is rarely just the window. We check the rough opening for rot, square, and water marks before we recommend anything.
We keep OEM ES Windows sash, rollers, locks, and weatherstripping on hand for the common Montclair repair, and we source quality aftermarket glass and hardware when OEM parts are discontinued. Our team handles the full construction scope, not just the window: if the opening needs reframing, re-flashing, or a new sill pan, we do that under the same contract. One contractor, every trade. No finger-pointing between a window installer and a stucco crew.
Noel Figueroa learned the fundamentals at Chaffey College’s construction technology program, which put him on job sites before he was old enough to rent a truck. He has spent the decades since working across the Inland Empire, and in Montclair, he is known for the kind of finish work that holds up under a second look: framing that is square, trim that meets the corner, and envelopes that read as one continuous wall.
Styles & brands we work with
Common ES Windows Construction Problems We Solve in Montclair
- Fogged insulated glass on west- and south-facing units. Pomona Valley summer heat and Santa Ana wind cycling cook the seals on ES Windows 6000 Series single-hungs and older picture-window combos. We see this most on the afternoon side of Montclair tract homes, where the glass bakes for hours and the seal fails before the frame does.
- Water intrusion at the head and sill on original ES sliders. The 1950s stucco walls in Montclair’s 91763 core often have thin or missing flashing behind the window flange. Every winter rain, water finds its way past the sill and onto the drywall. Replacing the glass alone does not fix a flashing problem.
- Rotted sill and bottom rail on older single-hung and slider units. This happens most in original detached garages converted to living space, where the window was never detailed for habitable use. The weep system may be blocked, or there was no weep system at all, so the frame sits in water and rots from the bottom up.
- Frames out of square and binding on settled tract homes. Mid-century framing settles. In Montclair, we routinely see ES Windows 7000 Series horizontal sliders where the track is no longer level, so the sash binds and the lock stops meeting cleanly. The window is not broken; the wall shifted.
- Window scope riding along with garage conversions and ADUs. On the small postwar lots near the 91763 core, original detached garages sit within inches of the rear property line. Any window or glazing change connected to a conversion has to survive a setback-and-survey review, not just a framing check.
ES Windows Service in Montclair: What Local Conditions Mean for Your Equipment
On the small postwar lots in Montclair’s 91763 core, the detached rear garage often sits within inches of the property line. That is the single fact that shapes ES Windows work here more than any other. When a homeowner wants to convert that garage to living space, or add an ADU behind the house, the window plan becomes a survey problem before it becomes a construction problem. The opening has to clear the setback, which means every inch of wall matters, which means the rough opening cannot be fudged.
We took on a garage-to-living-space conversion in Montclair’s 91763 core near the rear property line, where the original ES Windows slider in the old garage wall was letting winter rain past a sill that had never been flashed. Drawing the new egress window and slider openings meant working with the surveyor on how close we could push the wall, then reframing the rough opening square and setting a properly flashed ES Windows 6000 Series unit with a new sill pan. The conversion passed inspection with the envelope reading as one continuous wall with the rest of the house. That job taught us something we already knew in our bones: in Montclair, the window is never just the window. The same holds true for our ES Windows repair in La Verne.
ES Windows Models & Products We Service in Montclair
We work on the ES Windows 6000 Series single-hung, the 7000 Series horizontal slider, the 4000 Series single-hung retrofit units, and picture and awning window combinations. For repair work, we source OEM ES Windows sash, rollers, locks, and weatherstripping when the frame is sound, and quality aftermarket glass and hardware when OEM is discontinued and the opening is still solid. We stock common parts locally for fast Montclair turnaround. If the rough opening itself is wet or out of square, we say so, and we reframe and re-flash before a new unit goes in. That honesty is the core of our ES Windows sales & service approach.
See the difference
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AfterES Windows Service Pricing in Montclair
Window scope in Montclair usually falls into one of a few buckets, and the price depends on whether we are swapping glass, replacing a unit, or reframing an opening.
| Service | Typical Montclair Range |
|---|---|
| Window Replacement | $4,500 – $15,000 |
| Impact Window Installation | $8,000 – $25,000 |
| Garage Conversion (window scope included) | $30,000 – $80,000 |
| Home Addition (window scope included) | $45,000 – $130,000 |
What drives cost: whether the opening is square, whether we are pulling a permit, whether the wall needs flashing repair, and whether the unit is stock size or custom. A free estimate with us includes a look at the rough opening, not just the glass. Call (844) 384-3361 to schedule one.
Serving Montclair, CA — Our Local Coverage Area
We’re based in the Montclair 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 – ES Windows Construction in Montclair
A like-for-like swap is only enough if the rough opening is dry, square, and flashing is intact. In most 1950s Montclair stucco walls, at least one of those three is not true. We inspect the opening before we quote a replacement. Call (844) 384-3361 and we will tell you what we find.
Yes. On Montclair’s small postwar lots, the garage often sits inches from the property line, so the new window and egress opening has to fit within the legal setback. We coordinate the surveyor, the plan review, and the framing so the window lands where it is allowed and the opening reads as one wall.
For Montclair, we generally recommend the ES Windows 6000 Series single-hung for fixed-wall openings and the 7000 Series slider where ventilation matters. Both handle Pomona Valley heat and Santa Ana wind cycling better than older vinyl units, but the flashing and sill pan behind the window matter more than the model number.
We can. Matching means getting the frame color, sightlines, and mullion pattern right, and we source ES Windows units and compatible hardware to keep the addition from looking like an addition. We have done this on multiple Montclair garage conversions and room additions.
If the glass is clear and the damp patch is on the wall below, it is almost always flashing or sill pan, not glass. Montclair’s flat lots and 1950s stucco walls make this the most common ES Windows failure we see in the winter. Call (844) 384-3361 and we will trace the water before you spend on a new sash.
Service Areas Near Montclair
We serve Montclair and the surrounding Pomona Valley, including Montclair service area neighborhoods, Chino, Rancho Cucamonga, Ontario, and Upland. For work just east of Montclair, see our ES Windows service in Chino page. For the north side, see ES Windows service in Rancho Cucamonga.
Book Your ES Windows Service in Montclair Today
If you have an ES Windows problem in Montclair, call (844) 384-3361 to schedule a free estimate. We will look at the window, the wall, and the rough opening, and tell you what actually needs to happen. Build it right the first time. The second time costs twice as much and nobody’s happy about it.
Written by Noel Figueroa, Owner at Workshop Contractors, serving Montclair and the Pomona Valley since his first framing jobs on Ontario’s postwar blocks. Explore our ES Windows in Claremont as well.