Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Window Replacement Across Lennox
Replacing windows in Lennox means dealing with something most window companies never mention: LAX. Lennox sits directly beneath the airport’s primary flight paths, and many homes here already have acoustically-rated windows installed through LAWA’s Residential Sound Insulation program. That changes how every replacement job starts. When you call Westlight Windows & Doors at (903) 354-7134, we check the Sound Transmission Class rating on your existing units before we quote you a single number. It’s the difference between a window that works and one that leaves you hearing jet noise at 6 a.m. We know Lennox’s stucco homes, its mid-century rough openings, and its marine-layer moisture problems. Owen Satterfield has built our approach around writing the real price down before work starts, showing up in the window we gave, and coming back if something fails. Not someday. Not after you chase us.

Why Westlight Windows & Doors Is Lennox’s Preferred Window Replacement Company
Lennox homeowners call us after being burned. A contractor no-showed. A price jumped at the door. A window seal failed six months after install. We hear it on the first phone call, and we answer that call with a live person, any hour. Since 2009, Westlight has operated as an independently owned and operated Kingswell location, and the Kingswell Guarantee is the same on every Lennox job: written price before any work starts, a committed arrival window, a clean job site, and a written guarantee handed to you when the work is done. If a repair fails within the guarantee period, we return and correct it at no charge. That’s the Window Replacement standard we’ve built on, and it’s why homeowners off 105 near the Inglewood border keep our number on the fridge.
Our crews are background-checked and uniformed, so the person at your door is the person we said would be there. We carry eight manufacturer lines, including PGT, CGI, and CWS, so we match the product to the job instead of forcing one brand onto a 1958 stucco house with odd framing. And because Lennox has so many LAWA RSI retrofits, we keep laminated glass interlayers and acoustic-rated components stocked locally. That speeds up replacement work that would otherwise stall waiting on parts.
Window Sash Replacement in Lennox
Window Sash Replacement is what we do when the moving part of your window – the sash that holds the glass and slides or swings open – has failed but the surrounding frame is still solid. In Lennox, this is a common call because the marine layer off Santa Monica Bay keeps mornings damp, and moisture works its way into wood sashes fast. A typical sash replacement in Lennox runs $250 to $650 per sash, depending on material and whether we’re matching an RSI acoustic spec. If your sash is rotted, warped, or the balance system has failed so the window won’t stay open, replacing just the sash beats tearing out the entire frame. We measure the existing unit, check the rough opening for hidden damage, and write your price before the old sash comes out.
When a Sash Makes Sense Over a Full Frame
If the frame is square and the rough opening is dry, replacing the sash alone keeps the job smaller and faster. Lennox homes built in the 1940s and 1950s often have frames that are fine even when the sash is not. We’ll tell you honestly which one you need, because writing a full-frame quote on a job that only needs a sash is not how we work.
Matching Existing Acoustic Ratings
Many Lennox homes carry LAWA RSI windows with documented STC ratings on file with the county. If your sash is being replaced on one of those units, we match the existing rating with a laminated glass interlayer rather than dropping in a standard single-pane sash. Getting this wrong can trigger a compliance issue with FAA program records. It’s a Lennox-specific problem we see weekly.
Window Glass Repair in Lennox
Window Glass Repair in Lennox usually means a fogged insulating glass unit, a cracked pane, or a failed seal on an aluminum frame from the 1960s. You don’t always need a full window replacement when the glass fails. Repairs run $150 to $450 per pane for standard double-pane glass; laminated acoustic glass matching an RSI unit runs higher, typically $300 to $700 per pane. The marine layer accelerates seal failure here because constant moisture from May through July keeps frames damp and expands old aluminum, breaking the seal. We inspect the frame first, because a failed seal often signals a frame that’s already compromised. When we repair the glass, we warrant the work under the same 365-Day Done Right Promise we put on every job.
Fogged Glass and Failed Seals
A fogged unit means the inert gas between the panes has leaked out and condensation has gotten in. It’s not just ugly. The window loses its insulating value and the glass can eventually etch. In Lennox we see this most often on the west and south elevations where afternoon sun hits hardest and the marine layer keeps moisture cycling against the frame. Repair is usually a same-week job for us because we stock the common IGU sizes locally.
Cracked and Impacted Panes
Lennox sees its share of cracked panes, sometimes from debris, sometimes from the vibration and pressure changes of living under a flight path. If your pane is cracked but the sash is otherwise fine, we replace the glass unit and reglaze the opening. For homes with impact-rated PGT or CGI windows, we match the original impact rating and document it. No shortcuts, no compatibility questions later.

Trusted Brands We Service in Lennox
We install and service eight manufacturer lines, but on Lennox jobs we most often reach for PGT and CGI for impact needs, plus CWS for mid-century frame replacements that need a specific sizing profile. Because so many Lennox homes have non-standard rough openings from the 1940s and 1950s, we keep a range of frame profiles and acoustic interlayers on hand locally. That means when a sash or glass repair comes up, we’re not waiting on a distributor across the country. Your written price comes before any part gets ordered, and the warranty terms are printed on the quote. No vague handshakes.
Common Window Replacement Problems We See in Lennox Homes
- Non-standard rough openings from mid-century construction. The 1940s-1960s stucco homes in Lennox were built before standardized framing. We regularly find rough openings undersized by an inch or more, which means on-site framing correction before the new window sets. If your quote doesn’t write that allowance in advance, the job stalls.
- Marine layer moisture damage. From May through July, mornings stay damp, which rots undersized headers and degrades weatherstripping faster than in inland LA County. On a Lennox wood-sash home, this shows up as sticking windows, failed seals, and soft wood behind the trim.
- LAWA RSI compliance traps. If your home already carries FAA-funded acoustic windows, replacing one without matching the on-record STC rating can trigger a county compliance issue. This only exists at scale in Lennox. We check the record before we touch the frame.
- Cloth wiring and failed waterproofing behind old frames. Opening up a 1950s Lennox wall often turns up original cloth-insulated wiring and deteriorated tar paper. Both have to be corrected before we set the new window. We write those corrections as allowances in the contract, and we get your written approval before we start.
Pricing for Window Replacement in Lennox, CA
Here’s what real Lennox jobs cost. A standard insert window replacement runs $600 to $1,200 per window installed. A full-frame replacement on a mid-century stucco home with non-standard rough openings runs $900 to $1,800 per window, because we’re reframing, flashing, and waterproofing the opening correctly. Acoustic units matching an existing LAWA RSI STC rating run $1,200 to $2,500 per window, depending on the interlayer and frame spec. Window glass repair runs $150 to $700 per pane, and sash replacement runs $250 to $650 per sash. The price you’re quoted is the price you pay. That’s the Kingswell Way: say the price before the work, show up in the window we gave, leave the place cleaner than we found it, put the guarantee in writing, and come back if it fails. Call (903) 354-7134 for your free estimate.
We Also Serve Cities Near Lennox
While this page focuses on Lennox, our crews also handle Window Replacement in Lennox and the surrounding region. Homeowners in Los Angeles, San Diego, San Jose, and San Francisco reach us for the same written pricing and the same Kingswell Guarantee. The marine layer, the mid-century stock, and the acoustic window complications here in Lennox shape how we work everywhere else, too. Call and we’ll schedule your estimate.
Serving Lennox, CA - Our Local Coverage Area
We’re based in the Lennox 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 About Window Replacement in Lennox
No, not without checking the county’s RSI record first. Many Lennox homes have FAA-funded acoustic windows with a documented STC rating. Replacing one with a standard low-E unit without matching that rating can trigger a compliance issue with the county. We check the on-record spec before quoting you, and we’ll either match the acoustic rating or walk you through what a change means with the program. Call (903) 354-7134 and we’ll pull the documentation.
Because a Lennox wall built in the 1940s-1960s hides things. Non-standard rough openings, cloth wiring, failed tar-paper waterproofing. A contractor who discovers those after the job starts has to change the price on you, and that’s a terrible experience. We handle it differently: our initial inspection identifies the likely issues, and we write framing, wiring, and waterproofing corrections as allowances in the contract before work begins. You see the number written down, you approve it, only then do we touch the jamb. If a surprise appears, it’s priced and approved in writing before we proceed.
Yes. The marine layer off Santa Monica Bay keeps Lennox damp most mornings from May through July, and that constant moisture accelerates corrosion on aging aluminum frames and breaks down exterior door weatherstripping faster than in drier inland parts of LA County. That’s why older Lennox windows show white oxidation at the corners and doors don’t seal tight. It’s also why we recommend checking frame condition before replacing just the glass. Call (903) 354-7134 for an inspection.
Usually, yes. If the frame is square and the rough opening is dry, we can replace the sash alone for $250 to $650 per sash. If it’s only the glass, repair runs $150 to $700 per pane, with acoustic laminated glass at the higher end. We’ll tell you honestly which option fits your window. We don’t upsell a full replacement when a repair is the right call. Get your free estimate at (903) 354-7134.
Two things. First, Lennox has a high renter-to-owner ratio, so many rental units still have original single-pane aluminum frames from the 1950s and 1960s, which means non-standard rough openings and deferred maintenance are more common. Second, renters cannot authorize work on a property they don’t own, so we need the property owner or management company to sign the contract and the written price before we schedule. If the property still carries LAWA RSI units, the same STC matching rule applies. Call (903) 354-7134 and we’ll walk you through the paperwork.
Written by Owen Satterfield, Owner at Westlight Windows & Doors, serving Lennox with window replacement since 2009.










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