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AfterFast, Reliable Window Installation Across Kensington
Window installation in Kensington is governed by one fact most contractors miss: this hillside sits inside CAL FIRE’s Very High Fire Hazard Severity Zone, so every replacement unit must meet California’s Wildland-Urban Interface fire-resistant glazing and frame standards. We know the code, we know the county permit process, and we know the fog. Call (888) 635-0804 for a free estimate from a crew that has rebuilt more Kensington window openings than we can count.
TruePane Windows & Doors has served Kensington homeowners for years from our San Francisco Bay Area office, with crews dispatched locally. We are not a franchise operation running crews out of a different county. We pull permits through the Contra Costa County Building Inspection Division, which is the correct jurisdiction for this unincorporated community, and we register both warranty layers in writing before the truck leaves your driveway.
Why TruePane Windows & Doors Is Kensington’s Preferred Window Installation Company
Kensington homeowners call us because we answer the phone, not a voicemail tree. Dale Kessler, our founder, is a second-generation glazier who started TruePane in 2008 out of a simple frustration: too many window installs were out of true, and too many warranties were voided by paperwork nobody explained. The rule on his whiteboard still governs every job: if the pane is not true, the job is not done.
Our reputation in Kensington rests on the Done Right Promise. If something is not right after the install, we return and make it right. No arguing, no fine print that covers neither the glass nor the frame. Every job also carries The Keystone Standard: both manufacturer warranty layers registered in writing, with durations stated, before we leave. You will know exactly what is covered and for how long.
Kensington’s older homes demand tradespeople who understand wood, weather, and code. We are an authorized installer for more than a dozen manufacturer lines including, PGT, CGI, and ES Windows. We can quote side by side on paper so you see exactly what you are buying, and we specify WUI-compliant products that also respect the Craftsman and Period Revival character of this neighborhood.
Our Window Installation Services in Kensington
Casement Windows
Casement windows are common in Kensington’s 1920s through 1940s homes, and for good reason: they seal tightly against ridge-top wind when properly installed. In Kensington’s marine fog belt, the crank hardware on original steel casements oxidizes and binds within a few seasons. We replace them with stainless hardware and WUI-compliant frames that close like a vault door, and the divided-light profiles stay true to the home’s original look.
Single & Double Hung Windows
Original double-hungs in Kensington sag as fir and redwood sashes rot from decades of overnight moisture. Counterweight cords break, sashes bind, and glass seals fail from the constant wet-dry cycle. We rebuild the jamb pockets with new stainless hardware and install insulated glass units that hold a seal. A typical single or double hung replacement in Kensington runs $900 to $1,800 per opening depending on size and wood-clad versus vinyl selection.
Bay & Bow Windows
Bay windows on Kensington’s hillside homes do double duty: they open a room to the view and they take the full brunt of westerly wind off the Bay. The original support framing under many of these projections is undersized and water-damaged. We rebuild the knee braces and seat boards with pressure-treated framing and marine-grade flashing, then set the new window unit plumb and level so it drains properly instead of pooling fog moisture against the sill.
Awning Windows
Awning windows in Kensington work well for upper-story ventilation because they shed fog moisture while staying open during light rain. The original steel or aluminum frames on many Kensington homes have corroded to the point where the operators no longer engage. We install new units with sealed hinges and weep holes that actually drain, because a fogged or puddled awning window is a failure waiting to happen.
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 Kensington
We install and service windows from CGI, CWS, and ECO Window Systems, among more than a dozen manufacturer lines we carry as an authorized installer. What matters for Kensington is that we stock the hardware and parts these units need, so a broken crank or failed seal does not mean waiting three weeks for a part from the Midwest. We also keep manufacturer warranty forms organized and registered, which is the step most contractors skip and homeowners only discover when a claim is denied.
Common Window Installation Problems We See in Kensington Homes
- Fogged double-hungs from marine moisture. Kensington’s persistent overnight fog seeps into original wood sashes, and when the seal fails, condensation fogs between the panes. The fog rarely comes from rain; it comes from the marine layer that settles on this ridge every night.
- Oxidized steel hardware. Salt-laden air from San Francisco Bay corrodes original steel casement cranks, double-hung pulleys, and sash cords faster here than in flatland East Bay neighborhoods. By the time a homeowner notices a crank binding, the internals are usually gone.
- Non-fire-rated vinyl units failing inspection. Contractors who mostly work in El Cerrito or Berkeley sometimes install standard vinyl windows in Kensington, then the county inspector rejects the job because WUI fire-resistant glazing and frame standards apply here. The units have to be torn out and replaced, and the homeowner eats the cost.
- Sagging or sticking sashes from frame rot. Original fir and redwood frames rot from the inside out in Kensington’s fog belt. The sash sags, the counterweights break, and the window binds in July. We rebuild the pocket, flash the opening, and set the new unit so it operates cleanly year-round.
Pricing for Window Installation in Kensington, CA
Window installation in Kensington is priced by the opening, the product line, and the condition of the existing frame. A basic vinyl single or double hung replacement typically runs $900 to $1,800 per window. Wood-clad units, which most Kensington homeowners select to preserve the original character, run $1,600 to $3,400 per opening. Bay or bow window rebuilds with structural repairs start around $6,500 and can reach $14,000 depending on the projection size and what is hidden behind the drywall. WUI-compliant glazing adds roughly 10 to 15 percent to the unit cost, which is the price of passing inspection in this fire hazard zone. Every estimate is free, written, and line-itemed before any work begins. Call (888) 635-0804 to schedule yours.
We Also Serve Cities Near Kensington
Our Window Installation team serves homeowners throughout Kensington and the surrounding area, including Parkway, Arden-Arcade, Ladera Heights, and Commerce. If you live near the Kensington border and are unsure which jurisdiction handles your permits, call us and we will tell you straight.
Serving Kensington, CA - Our Local Coverage Area
We’re based in the Kensington 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 Installation in Kensington
Yes, you need them. Kensington sits inside CAL FIRE’s Very High Fire Hazard Severity Zone, which means every replacement window and door must meet California’s Wildland-Urban Interface fire-resistant glazing and frame standards, regardless of whether the home is new or a 1930s bungalow. This rule applies to the entire community, not just new construction. Contractors who work mostly in flatland El Cerrito or Richmond sometimes miss this, and the result is a failed county inspection and a tear-out. Call (888) 635-0804 to confirm your scope before you buy units.
Yes. We install WUI-compliant windows with simulated divided lights and wood-clad interior profiles that reproduce the muntin patterns and sash proportions of original Craftsman units. On a 1930s bungalow near the Arlington border, we replaced failed wood double-hungs with WUI-compliant Milgard wood-clad casements that kept the original divided-light look, and we did it without fighting the county inspector. The original fir sashes had rotted from decades of marine fog, and the old steel sash cords and pulleys were oxidized solid, so we rebuilt the jamb pockets and flashed with new stainless hardware before the new insulated glass units could seat airtight. That is the standard here.
The fog comes from Kensington’s marine fog belt, not from rain. This hillside sits above the Bay and collects persistent overnight and morning moisture that condenses inside failed seals and rotted wood sashes. The seals were never designed to handle the wet-dry cycle this microclimate produces, and once fir frames start retaining moisture, the glass fogs from the inside. Replacing the sash with a properly flashed, sealed insulated glass unit is the only permanent fix. Call (888) 635-0804 for an assessment.
Casement windows hold up best because they seal under compression and resist lateral wind better than double-hungs, which is why so many Period Revival homes in Kensington originally specified them. We recommend wood-clad casements with stainless hardware and multi-point locking for ridge-exposed elevations, and we can match the divided-light profiles so the window does not look like a modern insert. For sheltered elevations, a properly rebuilt double-hung works fine if the frame is flashed and the counterweights are replaced with modern balances.
Kensington is unincorporated Contra Costa County, so window and door permits go through the Contra Costa County Building Inspection Division, not a city department. Contractors who work primarily in Berkeley or El Cerrito sometimes submit the wrong jurisdiction’s forms, and the job stalls until the paperwork is corrected. We handle county permitting on every job, pull the correct forms, and schedule inspections so the work passes the first time. Call (888) 635-0804 for a free estimate and a straight answer on your permitting route.
Get Your Free Kensington Window Installation Estimate
You have lived in your Kensington home long enough to know what works and what does not. The windows that fog every winter, the crank that binds, the sash that sags: those are fixable, and the fix will last if it is done right. Call (888) 635-0804 and talk to a live person, any time, any day. We will walk your openings, quote manufacturer lines side by side on paper, and register both warranty layers in writing before the truck leaves the driveway. The estimate is free. The peace of mind comes from knowing the work will still be standing in thirty years.
Written by Dale Kessler, Owner at TruePane Windows & Doors. Dale is a second-generation glazier who founded TruePane in 2008 and has spent more than four decades setting glass and building the standard that bears his name.