







Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
ES Windows Windows & Doors: The West Covina Owner’s Guide
If you own a home in West Covina with ES Windows products and a part has failed, here’s the short version: we stock the most commonly needed ES Windows-compatible replacement parts on our trucks, and a full window or door replacement typically runs $4,500 to $15,000 installed, depending on size, style, and how many units you’re swapping. Most homeowners discover the failure the same way you probably did – a window won’t latch, a sliding door grinds on its track, or a seal has gone cloudy. We match the part, price it before we touch anything, and get it done without turning your house into a project zone.

You should know what you’re getting before we ever pick up a tool. That’s how we work, and it’s why we put the number in writing first.
Key Takeaways:
- ES Windows parts fail most often at seals, rollers, and locking hardware – not the glass itself
- We stock compatible replacement parts and can source OEM or quality aftermarket equivalents
- Full replacement pricing in West Covina: $4,500 – $15,000 based on your window or door configuration
- Written price before work starts, every time, no exceptions
- Every technician is background-checked, uniformed, and shows a photo ID at your door
Which ES Windows Models This Applies To

ES Windows manufactures a range of aluminum-frame windows and sliding doors commonly installed across Southern California homes, including many of the mid-century and 1980s-era houses you’ll find throughout West Covina neighborhoods like South Hills, Woodside, and the streets near Cameron Park. The parts most owners need fall into a few categories: roller assemblies for sliding doors, cam locks and keepers for casement and awning windows, weatherstripping and wool pile, and balance springs for single-hung and double-hung sashes.
Here’s the compatibility gotcha most people don’t know: ES Windows uses a range of frame depths and roller sizes depending on the series and the year it was manufactured. A roller that fits a 1990s ES sliding door will often not fit a 2010s model, even if the doors look identical from across the room. We don’t guess. We measure the frame depth, check the stamped label or etching when it’s still readable, and match the part to the series. If the label is worn off – and it usually is on older West Covina homes – we match by physical dimensions and weight rating.
OEM ES Windows parts are available for many models, but they’re not always the best value depending on what failed. For rollers and weatherstripping, quality aftermarket equivalents often perform as well or better and cost meaningfully less. For locking hardware and structural components, we lean OEM. Either way, you’ll know exactly what you’re getting and what it costs before we order or install anything.
Styles & brands we work with







Signs Your ES Windows Windows & Doors Is Failing
- Sliding door drags or grinds when you open it. This is almost always a roller failure. ES Windows rollers wear at the wheel, and once the nylon or steel wheel flattens, the door frame starts riding directly on the track. Left alone, it scores the track and turns a $40 roller job into a track replacement.
- Window won’t lock or the handle spins without engaging. The cam lock or keeper has stripped or corroded. West Covina’s dry heat isn’t usually the culprit here – it’s decades of use. The lock mechanism is small and wears faster than any other moving part on the window.
- Fog or condensation trapped inside the glass. The insulated glass unit (IGU) seal has failed and the desiccant inside is saturated. You can’t fix this one with a part swap – the IGU gets replaced. What matters is whether the ES Windows frame is still sound enough to justify it, and that’s something we’ll tell you straight.
- Draft or dust coming through a closed window. The weatherstripping or wool pile has flattened. This is the most common ES Windows failure we see in West Covina, and it’s also the cheapest to fix properly. New wool pile costs very little and takes minutes to install.
- Single-hung or double-hung window slams shut or won’t stay up. The balance spring has failed. This is the one DIY repair on this list where we’ll tell you to stop. Balance springs are under tension, and the wrong move will put a spring through your hand or your window frame.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
Full window replacement in West Covina runs $4,500 to $15,000, and the spread comes down to three things: how many windows or doors you’re replacing, whether they’re standard or custom sizes, and the frame material you choose. A single sliding patio door replacement lands at the lower end. A whole-house window package with multiple bedrooms, a living room slider, and custom sizing lands at the top.
For parts-only repairs – rollers, locks, weatherstripping – you’re typically looking at $150 to $450 including labor, depending on the part and how many need swapping. We carry the most common ES Windows-compatible parts on the truck, which means most single-part jobs get done in one visit.
Every quote includes the part, the labor, and the disposal of the old component. The price we hand you in writing is the price you pay. If something changes once we open the frame up, we stop, call you, and give you a new written number before we go further. No surprise invoices, ever. The work is covered by our 365-Day Done Right Promise – if it’s not right within a year of completion, we make it right at no cost to you.

DIY or Call Us?
Some of this work is genuinely safe for a careful homeowner. Replacing a worn wool pile strip or cleaning and lubricating a roller track are the kinds of things we’ll happily talk you through over the phone, no charge. If you want to try it yourself, call us first and we’ll tell you honestly whether it’s worth the afternoon.
Here’s where DIY goes wrong: balance springs on hung windows are under enough tension to break fingers or shatter glass if they release the wrong way. Sliding door rollers often require removing the door from its frame, which means lifting a 100-plus-pound glass panel without letting it twist. If a window or door part fails in your West Covina home and it involves springs, tension, or lifting the glass out of the frame, let us handle it. Call (707) 760-7579 and we’ll get someone out to look.
FAQs

You can expect rollers and weatherstripping to last 10 to 20 years in West Covina conditions, with the sun and heat doing most of their damage to the wool pile and vinyl components rather than the glass or aluminum frames.
Most ES Windows frames in this area hold up structurally for 30-plus years, which is why a $40 roller replacement often makes more sense than a $1,500 door replacement. Call (707) 760-7579 for an honest assessment.
Yes – rollers, locks, weatherstripping, and balance springs are all replaceable parts, and we repair far more ES Windows hardware than we replace.
The only time repair doesn’t make sense is when the frame itself is bent, corroded through, or the glass seal has failed on an IGU with a damaged frame. We’ll tell you which one you’ve got, and we’ll show you why. Estimates are free.
Most single-part replacements on ES Windows hardware take 30 to 90 minutes on site, and we typically complete the work in one visit because the common parts are already on our trucks.
Full window replacements take a day or more depending on how many units are involved. We’ll give you a schedule before we start, and if it changes, you’ll hear it from us first.
We stock the most commonly needed ES Windows-compatible parts – rollers, cam locks, keepers, wool pile, and weatherstripping – on our trucks for most standard sizes.
For unusual sizes or OEM-specific hardware, we order from our supply network and typically have the part in hand within a few business days. We also stock parts for KraftMaid, Cambria, and Silestone when projects cross over.
Written by Isaac Pruett, Owner, Mason Remodeling Co West Covina at Mason Remodeling Co West Covina, serving West Covina and nearby areas.


