Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Impact Windows & Doors Across Whittier
Impact window and door replacement in Whittier typically runs $850-$1,400 per opening for a standard retrofit, and $1,500-$2,800 per opening when the rough opening needs shimming or reframing due to earthquake racking. Most pre-1990 homes in the 90601 ZIP fall into the second category, which is precisely why a square deal and a framing square matter more here than in neighboring cities. Our Impact Windows & Doors team works the older blocks near Uptown, the postwar ranch streets on the flats, and every neighborhood in between. Call (888) 635-0804 and a live person answers, day or night.
Why TruePane Windows & Doors Is Whittier’s Preferred Impact Windows & Doors Company
Whittier’s housing stock is not a generic assembly line of 1990s tract homes. The 1920s through 1940s Craftsman bungalows and Spanish Colonial Revival homes around the Uptown historic core still carry original single-pane wood sashes and solid-wood entry doors, and many of those openings got quietly knocked out of square by the 1987 Whittier Narrows earthquake. A standard replacement chart won’t save you there. Our crews know to check every rough opening with a framing square before ordering glass, because a 3-degree rack means the difference between a sealed frame and a unit that binds in July and leaks in January.
TruePane has been doing this work under Dale Kessler’s founding rule since 2008 of combined craft tradition: if the pane is not true, the job is not done. That is not a slogan. It is why we shim jambs, flash openings with butyl tape, and register both manufacturer warranty layers in writing before the truck leaves your driveway. Background-checked, uniformed technicians do the measuring and the install, and they answer to a company that plans to be in town in thirty years, not a call center reading from a script.
Whittier homeowners tend to call rather than click, and they remember the contractor who left them with a fogged seal and a door that binds. Our local reputation rests on showing up when we say we will, quoting manufacturer lines side by side on paper, and standing behind the work with the Done Right Promise. If it is not done right, we make it right, no paperwork and no arguing.
Our Impact Windows & Doors Services in Whittier
Hurricane Impact Windows
Whittier sits at the base of the Puente Hills, which funnel Santa Ana wind events and accelerate gusts compared to the open flatlands of neighboring cities. That geography means wind-rated glazing is not a luxury on the hillside streets above Whittier Boulevard and Mar Vista. Our team installs fusion-welded impact casements, single-hung, and picture windows with laminated glass rated to handle debris-driven wind loads, and we size every unit against the actual opening, not the manufacturer’s standard chart. In pre-war homes near the Uptown historic core, that almost always means custom sizing.

Impact Entry & French Doors
Entry doors on 1920s and 1930s homes in the 90601 ZIP have often been hanging in the same frame since the Narrows quake. The slab may still swing, but the rough opening is out of square, the threshold has settled, and the weatherstripping quit doing its job years ago. We replace those doors with impact-rated entry and French door systems, reframing and shimming as needed so the new unit actually seals against wind-driven rain off the Puente Hills. Wood slabs swell and stick seasonally in Whittier’s inland temperature swings, and a properly installed impact door with a thermally broken threshold puts an end to that.

Impact Sliding Glass Doors
Postwar ranch houses on the flatter eastern streets of Whittier often have original aluminum sliders that rattle in Santa Ana winds and leak air around worn rollers. We replace them with impact-rated sliding glass doors from PGT, CGI, and CWS, sized to the opening and set on a level track. Out-of-square openings from decades of settling get corrected before the new door goes in, because a slider that fights its track is a slider that fails early. The upgrade also quiets the indoor noise when wind gusts hit the hillside-facing glass.

Wind Mitigation & Code Compliance
Whittier’s building department requires permits for structural window and door replacements, and the code requirements here reflect the same inland wind exposure that makes impact ratings relevant. We pull permits, schedule inspections, and document the wind-mitigation features of every install so you have the paperwork if you ever need it for insurance or resale. Crucially, we also flag raft-to-wall connections and other wind-mitigation gaps an inspector may catch once the work is open, and we price those corrections in writing before we touch them. You will not get a surprise line item on our bill.

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 Whittier
We are an authorized installer for more than a dozen manufacturer lines, and on Whittier jobs we most often quote PGT, CGI, and ES Windows side by side on paper so you see exactly what you are buying. We keep common hardware, weatherstripping, and balance parts for these lines stocked for local service calls, which means a quick part replacement on a Whittier home usually happens in one visit, not two. If you have an existing impact window or door that failed or a seal that fogged, we can usually service it without a full replacement, and we always register both warranty layers in writing before we leave.
Common Impact Windows & Doors Problems We See in Whittier Homes
- Out-of-square rough openings from the 1987 Narrows earthquake. The magnitude 5.9 quake racked door frames and window openings across Whittier’s pre-1990 housing stock in ways cosmetic repairs never fixed. A new impact unit dropped into a 3-degree-off rough opening will bind, leak, or break its seal within a season or two until the opening is shimmed and corrected.
- Failed flashing on pre-war stucco and wood-siding homes. Wind-driven rain off the Puente Hills finds any gap between the flange and the sheathing. On older Whittier homes with original stucco or wood siding, we routinely find sill rot hidden behind trim that looked fine from the outside, and we replace the flashing and the damaged wood before the new unit goes in.
- Non-standard original openings on Craftsman bungalows. The 1920s and 1930s homes near the Uptown historic core were built before standardized rough-opening math. Using standard sizing charts often means oversized gaps that get crammed with backer rod and caulk, and that voids the insulated glass unit seal and the impact rating. We measure twice and order custom sizes where the opening demands it.
- Seasonal door binding from Whittier’s inland temperature swings. Whittier’s position inland from the coast produces wider daily and seasonal temperature swings than coastal LA communities. Solid-wood door slabs swell and stick in humid summer months, and impact-resistant replacements with proper clearances and thermally broken frames put an end to the July door fight.
Pricing for Impact Windows & Doors in Whittier, CA
A standard impact window retrofit in Whittier runs $850-$1,400 per opening when the rough opening is square and the existing frame is sound. The moment we find earthquake racking, rotted sill wood, or a non-standard Craftsman opening, that same window becomes a $1,500-$2,800 job because we are shimming, reframing, or ordering custom sizing, not just swapping glass. Impact entry doors typically run $2,200-$4,500 installed in the 90601 ZIP, and impact sliders run $2,800-$5,500 depending on opening width and frame condition. These are honest ranges for Whittier’s housing stock, and they are why we inspect first and quote in writing. Call (888) 635-0804 and we will come out, measure every opening, and hand you a line-item quote with no vagueness and no change orders you did not approve in writing.
We Also Serve Cities Near Whittier
Our Whittier crews regularly work the bordering streets into Pico Rivera, South El Monte, Hacienda Heights, and Montebello, and we carry the same impact-rated product lines and the same inspection-first process into each of those communities. If you are a few blocks over the city line, you are still getting the same TruePane team, the same written warranty registration, and the same square deal. This page is about Impact Windows & Doors in Whittier, but our service area covers the surrounding neighborhoods without a second appointment or a drive-time upcharge game.
Serving Whittier, CA - Our Local Coverage Area
We’re based in the Whittier 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 - Impact Windows & Doors in Whittier
Because the 1987 Whittier Narrows earthquake left thousands of door frames and window rough openings in pre-1990 homes with subtle racking that standard replacement units will not fit without shimming or reframing. That condition is far more common in Whittier than in neighboring Norwalk or La Habra, which suffered far less damage. Our crews bring a framing square and extra shims on every Whittier job, because we expect to need them. Call (888) 635-0804 and we will inspect your openings before you order anything.
In most cases, yes. We remove the original wood trim carefully, set the new impact unit into the corrected rough opening, and reinstall the trim with minimal visible change to the interior. When the trim is too deteriorated to save, we mill matching profiles so the finished window looks like it belongs on a 1920s Craftsman, not a 2020s spec house. Tell us the trim matters to you and we will treat it as part of the job, not an afterthought.
Yes, structural window and door replacements in Whittier require a permit, and the permit triggers code upgrades that can add cost once the walls are open. We pull the permit, schedule the inspection, and write realistic allowances into your contract so a surprise code correction does not move your remodel quote mid-project. Any additional work we find gets priced and approved in writing before we touch it, which is the only honest way to run a Whittier job.
Yes. Impact-rated windows are tested to withstand windborne debris and sustained wind pressure, and on Whittier’s hillside-facing streets the laminated glass and reinforced frames hold up to gusts that rattle standard single-pane sashes. The tighter weatherstripping also cuts the dust and noise that come with Santa Ana events. We quote wind-rated glazing for any Whittier home in the Puente Hills wind path, and we document the rating for your records.
Fog between panes means the insulated glass unit seal has failed, and Whittier’s wide daily and seasonal temperature swings shorten the lifespan of those seals compared to coastal LA communities. Impact windows use laminated glass and a beefier frame that resists the thermal stress that kills standard double-pane seals, but no window is immune forever. The fix for an existing fogged unit is glass replacement, not a whole new window, and we can usually do it in one visit. Call (888) 635-0804 for a diagnosis and a straight answer.
Call TruePane Windows & Doors at (888) 635-0804 for a free estimate on impact windows and doors in Whittier. A live person answers, we schedule the inspection, and you get a written quote that accounts for whatever that 1987 quake left behind in your walls. We’ll be there when we say, and we stand behind the work.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Whittier and surrounding communities with impact-rated window and door installations since 2008.



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