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ES Windows Windows & Doors: The Thousand Oaks Owner’s Guide
Most ES Windows window and door part replacements in Thousand Oaks run between $450 and $2,400 installed, depending on whether we’re replacing a roller assembly, a lock set, weatherstripping, or a full sash. We stock the common ES Windows replacement parts on our trucks and can usually complete the repair in one visit. The first sign most homeowners notice is a window or sliding door that suddenly drags, sticks, or won’t stay square in the frame. A window that was smooth in March and grinding by September has usually worn through a roller or let a seal dry out in the Thousand Oaks heat.
Which ES Windows Models This Applies To

ES Windows builds product lines that vary more in hardware than most homeowners realize. The ESW-7000 series, common in Thousand Oaks tract homes, uses a different roller profile than the heavier ESW-9000 commercial-grade line, and the two are not interchangeable. The fast way to identify your series is the label on the inside edge of the sash or on the head jamb: it will show a model number starting with ESW followed by four digits. If the label is gone, measure the width of the frame channel where the roller sits: 5/8-inch channels point to the 7000 family, 3/4-inch to the 9000.
On the OEM versus aftermarket question, we’re direct about what we’ve seen. For rollers, lock mechanisms, and weatherseal, quality aftermarket parts perform as well as ES Windows OEM parts and cost 30 to 40 percent less. For glass units, gas-filled panes, and anything structural, we go OEM. The failure mode on an aftermarket glass pack in the Conejo Valley’s UV intensity is not a risk worth taking on a $900 window assembly.
We also stock parts for KraftMaid, Cambria, and Silestone installations, so if your ES Windows door hardware went out and you’ve also got a cabinet hinge that’s been nagging you, one visit can knock out both.
Styles & brands we work with







Signs Your ES Windows Windows & Doors Is Failing
- Sliding door drags or grinds on the track. The roller bearings are worn flat or the roller housing has cracked. Leaving it drags wears the track itself, and a track replacement is a much bigger job than a roller swap.
- Window won’t stay up when opened. The block-and-tackle balance inside the side channels has lost tension. On ES Windows units this is often age-related fatigue, not a broken cord. The window can drop without warning, which pinches fingers fast.
- Condensation between the two panes. The argon or krypton fill has escaped through a failed edge seal. The window’s insulating value is gone. In Thousand Oaks where mornings swing from 45 degrees to 85 by noon, that means visible fog and a draft you can feel with your hand.
- Lock bolt won’t throw or the handle spins. The internal cam gear in the lock assembly is stripped. This is a security issue, not a comfort issue. A door that looks locked but isn’t is a real problem.
- Air leak at the frame edge you can feel on a breezy day. The weatherstripping has compressed and taken a set. Living a mile inland from the 101 where canyon winds move through Westlake and Newbury Park, you’ll feel this before you see it.
See the difference
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After
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AfterReplacement Cost & What’s Included

Here’s what we quote in Thousand Oaks, parts and labor included:
- Roller assembly replacement: $450 to $700 per sliding panel, including new rollers, housing, and track cleanup.
- Lock set replacement: $250 to $500 per locking point, hardware matched to your ES Windows series.
- Weatherstripping and seal replacement: $180 to $400 per window or door, depending on linear feet and profile.
- Balance replacement: $300 to $550 per window, both sides, including glass-unit removal and reset.
- Full sash replacement: $900 to $2,400 per sash, including new glass pack, hardware transfer, and installation.
The range comes down to series (7000 parts run less than 9000), access (second-story windows with a clear ladder path cost less than a garden window over a built-in counter), and whether the damage is isolated or has worn the surrounding frame. Every quote is a written line-item price before work starts. No one on my crew changes a part you didn’t approve in writing. The repair work is covered by our 365-Day Done Right Promise: if it fails within a year of completion, we return and make it right at no charge.
DIY or Call Us?
There are things worth checking yourself. Clean the track. Check for a loose handle screw. See if the weatherseal is visibly missing a chunk. Those are safe. What I’d leave alone: any window that has a balance, a spring, or stored tension. A block-and-tackle balance under load can release without much provocation, and the glass in these assemblies is not something you want a hand in front of. We also see a lot of homeowners misidentify a 5/8-inch roller as a 3/4-inch and install a part that binds in three months.
Tell me what you need done. We’ll tell you what it costs and how long it takes, then we’ll do exactly that. Call (805) 309-3386 and we’ll schedule a look. The estimate is free, and we’ll bring the common ES Windows parts on the truck so a single visit usually finishes the job.
FAQs

Rollers and weatherseal on ES Windows units in Thousand Oaks typically last 8 to 15 years, with south-facing and west-facing exposures wearing faster due to UV exposure and afternoon heat. Hardware like locks and handles lasts 15 to 20 years if not forced. If your windows are in that 10-year range and two or three rollers are already out, the rest are on borrowed time. Call (805) 309-3386 for an honest assessment, not a upsell.
Sometimes, yes. A roller with debris in the bearing can be cleaned and reinstalled, and a lock cam that’s simply misaligned can be reset. But a worn roller with flat spots, a stripped gear, or a gas-filled pane with a failed seal is a replace-it situation. We’ll tell you which one you have and show you the worn part. Estimates are free at (805) 309-3386.
A roller replacement takes 30 to 60 minutes per panel. A full sash swap runs one to two hours. Most single-part repairs are done in one visit, and we schedule with a real time window so you’re not waiting on an 8-to-noon that becomes 4 p.m. Call us at (805) 309-3386 and we’ll give you a straight answer on timing.
We stock common ES Windows rollers, lock sets, balances, and weatherseal profiles on our trucks for on-the-spot installs. Specialty glass packs and less common series hardware we order, usually with a three-to-five-business-day lead time. The difference matters because it means most ES Windows repairs in Thousand Oaks are one-visit jobs. Call (805) 309-3386 with your model number and we’ll tell you if the part is on the truck before we schedule.
If your ES Windows window or door is starting to fight you, the fix is usually a part swap, not a whole new unit. Call Mason Remodeling Co Thousand Oaks at (805) 309-3386. We’ll give you a written price, show you exactly what we’re replacing, and send a technician whose name and photo you’ll have before they ring the doorbell.
Written by Isaac Pruett, Owner, Mason Remodeling Co – Thousand Oaks, CA at Mason Remodeling Co Thousand Oaks, serving Thousand Oaks and nearby areas.


