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 Pomona
Window replacement in Pomona means dealing with a housing stock most other cities don’t have. The pre-war Craftsman bungalows around Lincoln Park, the 1950s ranch tracts off Garey Avenue, the Spanish Colonial homes near downtown: these houses were built to early-20th-century framing conventions, and their original wood-sash and aluminum windows are now failing under the Pomona Valley’s brutal heat-and-freeze cycling. TruePane Windows & Doors has replaced and restored windows in Pomona homes for years, and we’ve learned one thing above all: a “standard” replacement unit almost never drops straight into an older Pomona opening. That’s the work we’re built for. Call (888) 635-0804 and we’ll come measure, give you a straight written quote, and explain exactly what your walls will need before any work starts.
Why TruePane Windows & Doors Is Pomona’s Preferred Window Replacement Company
Pomona homeowners don’t call us because we’re the fastest pitch. They call because the last company left a window that binds in July, a seal that fogged by January, or an estimate that changed after the wall was open. We work differently. Dale Kessler founded TruePane in 2008 on a rule that still hangs in the shop: if the pane is not true, the job is not done. We measure every opening twice. We quote manufacturer lines side by side on paper so you see exactly what you’re buying. And we register both warranty layers in writing before the truck leaves your driveway in Pomona, because a warranty that isn’t registered isn’t a warranty.
Our crews serve Pomona neighborhoods across the 91766 zip code, from the streets around Lincoln Park up through the older tracts west of Towne Avenue and out toward Phillips Ranch. We know which homes carry true 2×4 rough openings and which post-war tracts have code-uniform framing. That matters when the wall gets opened. A background-checked, uniformed technician answers your questions directly, and a live person answers our phone 24 hours a day, seven days a week. No voicemail tree, no callback form.
We’re an authorized installer for more than a dozen manufacturer lines including, PGT, and CGI. Every job is covered by our Done Right Promise. If it isn’t done right, we make it right. No paperwork fights, no fine print that covers neither. We also carry a permanent 5% discount for seniors and veterans because a lot of Pomona homeowners have lived in their house for twenty or thirty years and plan to stay for thirty more.
Our Window Replacement Services in Pomona
Full Frame Replacement
When the old window comes out and the frame itself is rotted, racked, or undersized, the right fix is full frame replacement. We remove the entire unit down to the rough opening, inspect the framing and waterproofing hidden behind the trim, and rebuild with a correctly sized, correctly flashed new window. In Pomona’s pre-war homes, this is where we most often find real surprises: true 2×4 rough openings, non-standard sill depths, and water damage that has been sitting behind the original sash for years. We handle all of it, and any change to scope gets priced and approved in writing before we proceed.
Full frame replacement in Pomona is the right call when the existing frame is compromised or when you want maximum glass area and a cleaner thermal break. It is also the surest path to fixing the drafts and seal failures that come from decades of 100°F afternoons followed by near-freezing winter nights.

Insert Window Replacement
If the original frame is still square and sound, an insert replacement fits a new window unit inside the existing opening with less disruption to interior trim and exterior stucco. For many Pomona ranch homes from the 1950s and 1960s, this is a practical, lower-cost route that still delivers modern double-pane performance. We template every opening rather than trusting a tape measure, because even in tract homes, sixty years of settling and Santa Ana wind pressure can leave an opening a quarter-inch out of square. A window forced into an untrue opening wobbles in the track and fails at the seal. We measure twice, and we do not guess.

Storm Window Replacement
Some Pomona homeowners want an exterior storm layer without losing the original wood sash inside. Storm window replacement gives you a secondary glazing line that buffers the Santa Ana-driven pressure swings and knocks down drafts without altering the home’s Craftsman character. This matters in the historic districts around Pomona where the original window profile is part of the house. We carry lines from CWS and ECO Window Systems that can be matched to original sightlines, and we can color-match frames to the existing trim on older homes. If the original sash is salvageable and the homeowner wants to keep it, storm replacement is often the best answer.

Energy-Efficient Upgrade
Pomona sits in one of the hottest inland pockets of the eastern San Gabriel Valley. Summer afternoons over 100°F are routine, and winter nights can drop near freezing. That thermal range is what fast-tracks seal failure on old single-pane windows, and it is also why low-E coated, argon-filled insulated glass pays back quickly in a Pomona home. We quote glass packages side by side, including low-E coatings tuned for Pomona’s hot-dry summers rather than a coastal climate they were never designed for. A window spec that works in Long Beach is not the right window for the Pomona Valley heat basin.

What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Pomona
As an authorized installer for more than a dozen manufacturer lines, we can match the right product to the right house instead of steering every Pomona homeowner into one brand. We regularly install CGI, CWS, and ECO Window Systems products in Pomona homes, and we are set up to service them long after the sale. When a homeowner calls with a failed seal or a stubborn track, we don’t tell them to call the manufacturer. We pull the part, order it under warranty, and come back. That is the difference between a company that installed your window and a company that still answers the phone when it fails.
Common Window Replacement Problems We See in Pomona Homes
- Warped and racked original wood sashes. The 1920s through 1950s housing stock across Pomona still has a lot of original single-pane wood windows, and the valley’s extreme diurnal temperature swings cause the wood to expand, contract, and eventually warp out of true. A warped sash will not seal, no matter how many times you re-putty it.
- Failed insulated glass units (fog between panes). Older aluminum frames oxidize and rack during Santa Ana wind events, and once the frame flexes, the glass seal lets go. Argon escapes, moisture gets in, and the window fogs permanently. This is one of the most common call-outs we see across Pomona, especially in the ranch tracts where aluminum sliders were installed in the 1960s and 1970s.
- Hidden water damage behind original trim. By the time water staining shows inside the wall, the framing behind an original window has often been rotting for years. In Pomona’s older homes, we routinely find undersized or damaged framing once the window comes out, and that condition often triggers mandatory code upgrades under Pomona’s permit inspection process. This is exactly why a responsible quote allows for what we find when the wall is opened.
- Air leakage tied to Pomona’s air quality problem. Prevailing winds funnel smog and particulates eastward into the Pomona Valley, where they sit. For a homeowner with leaky single-pane windows, that means outdoor air and fine particulate are getting into the house around the sashes. Tight, well-sealed replacement windows do real work here, both for energy cost and for indoor air quality.
Pricing for Window Replacement in Pomona, CA
Window replacement pricing in Pomona runs higher for pre-war homes because the work is more involved. A straightforward insert replacement in a post-war ranch typically runs $600-$1,200 per window installed. Full frame replacement in an older Pomona home, where the rough opening needs custom sizing or site-built extension jambs, typically runs $1,100-$2,400 per window depending on size, glass package, and what we find when the wall is opened. Historic wood-sash restoration, where we rebuild the original sash and add a quality storm layer, usually runs $900-$2,000 per opening. Energy-efficient upgrades with low-E/argon glass on large picture windows or sliders can go higher.
The single biggest influence on final cost in Pomona is what is behind the trim. We address that with inspection first, allowances written into the contract, and any surprise priced and approved in writing before we touch the frame. We also offer a free written repair estimate and a maintenance check, and seniors and veterans save 5% permanently. Call (888) 635-0804 for a free estimate, and you will get a written number, not a range that expands later.
We Also Serve Cities Near Pomona
Our Window Replacement crews serve Pomona and the surrounding eastern San Gabriel Valley communities. If you’re in Diamond Bar, Montclair, Chino Hills, or Claremont, we offer the same written estimate process and the same Done Right Promise. For a closer look at our local coverage, see our Window Replacement in Pomona page for neighborhood-specific details, or call us directly and we’ll schedule a measurement.
Serving Pomona, CA - Our Local Coverage Area
We’re based in the Pomona 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 - Window Replacement in Pomona
They change because Pomona’s pre-war and early post-war homes hide framing conditions behind the old trim. Once we open the wall, we often find rotted framing or non-standard rough openings that were never visible during the estimate. TruePane handles this with a written allowance in the contract and a firm rule: any surprise gets priced and approved in writing before we touch the frame. You are never billed for a condition we did not show you and you did not approve. Call (888) 635-0804 for an estimate that is honest about what opening a Pomona wall actually uncovers.
Yes, most window replacement work in Pomona requires a permit, and the city’s inspection process can trigger mandatory code upgrades once the wall is opened. If we find undersized framing, failed waterproofing, or conditions that do not meet current Pomona building code, the permit inspection may require us to bring that framing up to code before we can set the new window. We plan for this. We pull permits, coordinate inspections, and write code-upgrade allowances into the contract before work starts, so the permit process does not become a mid-project surprise. Call (888) 635-0804 to talk through what your specific house is likely to need.
Yes, and most homeowners in the Craftsman-era blocks around Lincoln Park want exactly that. The best route is usually a historic window restoration rather than a full replacement: we rebuild the original wood sash, reglaze, weatherstrip, and add a matching exterior storm window from a line like CWS or ECO Window Systems. You keep the original profile and sightlines, but the glazing performance moves from single-pane to a true double-glazed system. If the original sash is too far gone, we can custom-build a replacement sash to match the home’s original dimensions rather than forcing an off-the-shelf modern unit into an opening that was never designed for it. Call (888) 635-0804 and we will come look at the actual windows, not just a photo.
Fog between the panes means the insulated glass seal has failed: the argon fill has leaked out and outside air has entered the space between the two glass layers. It is very common in Pomona, especially on older aluminum-framed windows on homes built in the 1950s and 1960s, because the frames oxidize and rack under the valley’s repeated heat-freeze cycling and Santa Ana wind pressure. Once the seal is gone, the window has permanently lost most of its thermal performance, and the fix is a new glass unit or a new window, not a cleaning. Call (888) 635-0804 and we’ll tell you whether your specific window can take a replacement glass pack or needs a full unit.
It affects your choice more than most homeowners realize. Pomona is one of the worst air-quality pockets in the greater LA basin because prevailing winds funnel smog and fine particulates eastward and trap them in the valley. If your windows leak around the sashes, that outdoor air is getting into your house. Tight-fitting, well-sealed windows with a quality low-E coating do double duty in Pomona: they cut the heat load on 100°F afternoons and they reduce indoor particulate infiltration from the valley’s trapped air. We quote glass packages that are tuned for Pomona’s hot-dry climate and its air quality realities, not a generic Southern California spec. Call (888) 635-0804 for a free estimate and a side-by-side glass comparison in writing.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Pomona and the eastern San Gabriel Valley with a craft standard set in 2008 and a founding rule that still governs every install: if the pane is not true, the job is not done.



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