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ECO Window Systems Construction in San Dimas, CA | Mason Remodeling Co West Covina
We provide independent ECO Window Systems service across San Dimas, from window replacement to impact window installation and full home additions that integrate ECO products correctly. The one thing that makes our ECO Window Systems work here different: we understand how steep, stucco-clad hillside lots north of Foothill Boulevard stress window frames, flashing, and seals in ways flatland homes never experience. If you need a crew that knows ECO Window Systems sales & service and the San Dimas foothills, call (707) 760-7579 for a free estimate.

Why San Dimas Residents Choose Us for ECO Window Systems Service
We’ve installed and repaired ECO Fusion Series, ECO Prestige Series, ECO 9000 Series, and ECO Garden Window units on dozens of San Dimas properties. Isaac Pruett grew up in Los Angeles and learned the trade through the construction technology program at Los Angeles Trade-Technical College before spending decades on real jobs across the San Gabriel Valley. That means we don’t guess at how an ECO frame behaves when a hillside lot settles half an inch. We’ve seen it. We know which seals fail first under the San Dimas sun and which flashing details keep winter rain out of a stucco wall. Every crew member arrives with a name and photo sent before the visit, wearing a clean uniform and a photo ID badge at the door. That’s the Threshold Standard, and it applies on every ECO Window Systems job we take in San Dimas.
Styles & brands we work with







Common ECO Window Systems Construction Problems We Solve in San Dimas
- Sagging or binding sashes on large picture windows. Hillside settling and the wide temperature swings between San Dimas summers and winter nights put real stress on ECO Fusion and Prestige picture window frames. We realign sashes, replace worn balances, and when the frame itself has moved, we address the rough opening before reinstalling the unit.
- Leaking around window frames after heavy winter rains. Older ranch-style homes in San Dimas often have original flashing that’s corroded or was never installed properly for stucco. We pull the exterior trim, replace the pan and sill flashing, and reseal the window so the next storm stays outside.
- Fogging between double panes from seal failure. The intense San Dimas sun breaks down desiccant seals over time. We replace the insulated glass unit, or the full sash when the frame’s structural integrity is compromised, and we do it with OEM-spec components whenever possible.
- Dust and moisture streaks on the interior side of the glass. Dry, dusty foothill air finds every gap in failing weatherstripping. On ECO Garden Window units especially, the small seals around venting panels wear out fast. We replace weatherstripping with the correct profile so the dust stays outside where it belongs.
- Clogged weep holes causing water pooling inside the track. Hillside debris, dust, and spider webs clog the drainage channels on older ECO windows. We clear them, verify the slope of the sill, and fix the flashing so water drains out instead of into your wall cavity.
ECO Window Systems Service in San Dimas: What Local Conditions Mean for Your Equipment
On steep hillside lots north of Foothill Boulevard, many San Dimas homes have windows mounted directly into stucco walls with minimal exterior flashing. Flatland houses rarely show this condition, and it’s the single biggest reason ECO Window Systems units leak or fail prematurely in this city. When a window is set into stucco without a proper pan flashing at the sill and a drainage plane behind the flange, every winter rain gets a direct path into the wall. We correct this on every replacement we do in San Dimas. Our crew replaced a fogged ECO Prestige Series picture window on a two-story home off San Dimas Canyon Road after discovering the original weep holes were clogged with hillside debris. We cleared the drainage, installed a new OEM sash, and re-flashed the rough opening to prevent rain intrusion during the next winter storm. The homeowner hasn’t seen a drop of condensation since. That’s what proper sill integration buys you on a San Dimas hillside.
ECO Window Systems Models & Products We Service in San Dimas
We work on the full ECO Window Systems lineup: Fusion Series, Prestige Series, 9000 Series, and the ECO Garden Window. For critical components like balances, locks, and weatherstripping, we use ECO Window Systems OEM parts whenever they’re available, because the fit and finish matter on a window you’ll look at every day. For discontinued trim or hardware, we source high-quality aftermarket alternatives that match the original profile closely. We stock common ECO weatherstripping profiles, balances, and locking hardware locally for fast San Dimas turnaround. We recommend full replacement only when the frame shows rot or warping, not for simple seal or hardware issues.
See the difference
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After
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After
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AfterECO Window Systems Service Pricing in San Dimas
| Service | Price Range |
|---|---|
| Window Replacement | $4,500 – $15,000 |
| Impact Window Installation | $8,000 – $25,000 |
What drives the final number: the number of windows, whether we’re replacing a simple double-hung or a large picture window on a hillside, and how much flashing correction the existing rough opening needs. A stucco wall with original 1970s flashing takes more labor than a flatland window that’s simply old. Your free estimate includes a written line-item price before any work starts, so you’ll know the exact cost before we pick up a tool. Call (707) 760-7579 to schedule yours.
Serving San Dimas, CA - Our Local Coverage Area
As a General Contractor - San Dimas team, we’re based in this area and know the community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.

FAQs – ECO Window Systems Construction in San Dimas
If the vinyl or composite frame has actually warped, we replace the unit. You can’t safely straighten a warped frame, and trying to reseal around one leaves you with a window that will leak again. Call (707) 760-7579 and we’ll tell you honestly whether repair or replacement makes sense for your specific window.
Morning condensation on the inside of an ECO Garden Window usually means the seal between the glass panes has failed or the venting panel weatherstripping isn’t seating properly. San Dimas’s temperature swings make this worse. We test the seal and replace the failed component, either the insulated glass unit or the weatherstripping. Call (707) 760-7579 for an inspection and exact quote.
Yes, when the profile is still available from ECO Window Systems, we use OEM weatherstripping. It’s cut to the exact dimensions of the original channel, so the sash seats correctly and seals against San Dimas dust and winter rain. For discontinued profiles, we match an aftermarket alternative that fits the original channel precisely. Call (707) 760-7579 if you want us to check which profile your windows take.
We cut back the stucco, install a metal or adhesive sill pan flashing at the rough opening bottom, run a drainage plane up the jambs behind the flange, and lap the head flashing over the top. Then we re-stucco and paint to match. Without that pan at the sill, a hillside window takes on water every winter. Call (707) 760-7579 for a free estimate if your stucco windows are leaking.
The Prestige Series has a thicker frame profile and better structural reinforcement, which matters on a hillside lot where the house moves. A cheaper vinyl window flexes more and can bind when the rough opening settles. But the installation details are the same: proper pan flashing, correct shimming, and careful sealing. Get those wrong and even a Prestige Series window fails early. Call (707) 760-7579 and we’ll walk you through which ECO line fits your home and budget.
Service Areas Near San Dimas
We serve San Dimas and the surrounding foothill communities, including San Dimas service area, ECO Window Systems service in West Covina, ECO Window Systems service in Pomona, plus Walnut, La Puente, and La Habra. If you’re just outside San Dimas, call (707) 760-7579 and we’ll confirm coverage.
Book Your ECO Window Systems Service in San Dimas Today
We’re an independent ECO Window Systems service provider, not manufacturer-affiliated or authorized. What we offer is straight talk, OEM parts when they matter, and a written price before work starts. Call (707) 760-7579 to schedule your free estimate in San Dimas.
Written by Isaac Pruett, Owner at Mason Remodeling Co West Covina, offering San Dimas Bathroom Remodeling and window services since 2004.











