Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Window Installation Across Kentfield
Window installation in Kentfield carries a set of rules most window companies never learn until a job goes wrong. The town sits in a shaded Ross Valley pocket where mature redwood and oak canopy holds moisture against window frames for months at a time. Combine that with Marin County’s unincorporated design-review process, and you have a place where the wrong window, wrong flashing, or wrong finish fails within a few seasons. We know because we’ve corrected those failures on homes along Sir Francis Drake Boulevard, in the hills above College Avenue, and throughout the 94914 zip code. If you’re pricing replacement windows in Kentfield, call (888) 635-0804 and we’ll walk you through what actually holds up here.
Why TruePane Windows & Doors Is Kentfield’s Preferred Window Installation Company
We’ve been called out to Kentfield enough times to know the difference between a window that looks right and one that’s done right. Our crews work the upslope streets off Laurel Grove and the shaded lanes near the College of Marin campus regularly. What we see there shapes what we spec. We do not sell a stock unit and hope for the best. We measure every opening twice, quote manufacturer lines side by side on paper, and register both warranty layers in writing before the truck leaves the driveway. That’s The Keystone Standard, and it applies to every Kentfield job.
Dale Kessler founded TruePane in 2008 out of a simple frustration: too many installs were out of true, and too many warranties were voided by paperwork nobody explained. Years of craft heritage in the trade taught him what most franchise crews miss. We hire local, train apprentices into journeymen, and send background-checked, uniformed technicians who work in your home the way they’d work in their own mother’s. A live person answers our phone 24/7, so when you call about a fogged seal on a Kentfield hillside home, you get a person, not a voicemail tree.
We stand behind every install with the Done Right Promise. If it’s not done right, we make it right. No paperwork fights, no fine print that covers neither the frame nor the labor. Kentfield homeowners tend to keep their houses for decades. They remember the contractor who left a door binding in July. We plan to be here when they call back, and we answer.
Our Window Installation Services in Kentfield
Kentfield’s housing stock runs heavily to 1920s through 1960s Craftsman, Tudor, and Colonial Revival homes, with mid-century ranches mixed in. Most still carry original or early-replacement wood windows. The right replacement depends on the house, the lot, and the county’s design-review requirements. These are the four window types we install most often in Kentfield.
Casement Windows
Casement windows show up constantly on Kentfield’s older estates and ranches. They crank outward, which works well on shaded lots where you want to catch whatever breeze moves through the redwoods. We typically replace failed originals with clad-wood casements from Marvin or Andersen, specifying a marine-grade finish that survives the wet-dry cycle of a shaded Ross Valley lot. The operable sash also makes egress easier in upstairs bedrooms on hillside homes, which matters when Marin County reviews a permit.

Awning Windows
Awning windows hinge at the top and open outward, which makes them practical for Kentfield’s damp morning conditions. You can leave an awning window cracked during light rain without water pouring onto the sill. In the 94914 area, we see them paired with fixed picture windows in mid-century ranches, often over kitchen counters where reaching a crank is a hassle. We quote awning replacements with the same flashing and sealing detail we use on casements, because leaf litter and redwood duff do not care which sash style you chose.

Fixed & Picture Windows
Kentfield’s larger estate homes lean heavily on fixed and picture windows to bring in views of the oak canopy and ridgeline. A fixed window is simple: the glass carries the load, the frame carries the glass, and moisture is the only enemy. We install fixed units with insulated glazing matched to the home’s solar orientation. On shaded lots, that often means a higher visible-light transmission glass so the room doesn’t feel like a cave. On the upslope streets with southern exposure, we spec a low-e coating that cuts heat gain without darkening the room.

Single & Double Hung Windows
Double hung windows are the workhorse of Kentfield’s Craftsman and Colonial Revival homes. The vertical sliding sashes match the original architecture, and true-divided or simulated-divided lite patterns keep the county’s design-review board satisfied. We replace rotted original double hungs with clad-wood units that keep the divided-lite look while giving you a modern weather seal. The difference between a cheap vinyl look-alike and the right double hung in Kentfield is visible in about three wet seasons. We’ll show you both quotes on paper and let the specs speak.

What happens when you call
- 1
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 Kentfield
We’re an authorized installer for more than a dozen manufacturer lines, and for Kentfield’s specific conditions we lean most often on PGT, CWS, and ES Windows. PGT’s impact-rated units make sense for hillside lots inside Marin County’s Very High Fire Hazard Severity Zone, where fire-rated glazing is increasingly part of the design-review conversation. CWS and ES Windows give us the clad-wood and aluminum profile options that survive shaded, damp sills without swelling at the corners. We keep local parts availability in mind for every Kentfield quote, because a warranty is only as good as the parts supply behind it. Each window deal comes with side-by-side quotes so you see exactly what each line costs and what it delivers.
Common Window Installation Problems We See in Kentfield Homes
- Rot from redwood duff and leaf litter packing against sill pans. On upslope streets, duff collects against the sill pan and holds moisture for months. We regularly find rot that has wicked from the sill up into the king studs before the homeowner sees any visible failure indoors.
- Seal failure from sustained wet-dry cycling. Morning condensation off the dense oak canopy leaves wood sashes and thresholds in a continuous wet-dry cycle. Paint films crack, and insulated glass units lose their seal. The failure shows up as fog between the panes.
- Design-review mismatches. Homeowners trying to satisfy the county’s historically sympathetic requirements often end up with cheap wood look-alikes that lack a marine-grade finish. Frame corners swell, seals fail within a few seasons, and the homeowner pays twice.
- Under-flashed replacements on shaded lots. A window installed with builder-grade flashing tape and no pan corners on a Kentfield shaded lot is a callback waiting to happen. We see the results: moisture behind the casing, rotted trim, and glass units that have already lost their argon fill.
Pricing for Window Installation in Kentfield, CA
Window installation in Kentfield runs higher than inland Marin County for a reason: the materials spec has to survive shade, moisture, and county design review. A typical clad-wood casement or double hung replacement runs $900 to $1,800 per window installed, depending on size, lite pattern, and finish. A vinyl unit might price at $500 to $900 per window, but on most Kentfield properties that vinyl unit will not pass design review and will not survive the duff-and-condensation cycle. Bay and bow window projects run $4,500 to $9,500 depending on projection and glass package. Impact-rated units for fire-zone hillside lots add 30 to 50 percent to the base window cost. We give fixed pricing with no change orders, and estimates are free. Call (888) 635-0804 for a written line-item quote.
The price gap between a coastal-spec window and an inland-spec window is real. Stainless-steel pan corners, marine-grade flashing tape, and a clad-wood frame with marine finish add roughly 20 to 35 percent to the window cost. The cheap spec survives five to eight years on a shaded Kentfield lot before the corners swell and the seals fog. The right spec lasts 30 to 40 years. We’ll show you both numbers on the same sheet so you can see what the cheap bid actually costs over a decade.
We Also Serve Cities Near Kentfield
Our Window Installation crews work throughout the Ross Valley and central Marin. If you live in Larkspur, San Anselmo, San Rafael, or Corte Madera, the same TruePane team that handles Kentfield’s shaded lots and design-review requirements can help. Window Installation in Kentfield remains our home base for this area, and we schedule neighboring towns on the same routes.
Serving Kentfield, CA - Our Local Coverage Area
We’re based in the Kentfield 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 Kentfield
Yes. Kentfield is unincorporated Marin County, and most replacement window projects must satisfy the County’s design-review process. That often means historically sympathetic profiles and finishes, especially on the 1920s through 1960s homes that make up most of the housing stock. A vinyl swap-out rarely passes. We handle the design-review paperwork with every quote so you’re not filing alone. Call (888) 635-0804 for an exact assessment of your property.
Kentfield window sills rot because redwood duff and leaf litter pack against the sill pan and hold moisture for months at a time, keeping the wood in a continuous wet-dry cycle. Paint can’t protect wood that never dries out. The fix is a properly flashed sill pan with stainless-steel corners and a marine-grade seal, not another coat of paint. We inspect the framing around every rotted sill before quoting a replacement. Call (888) 635-0804 to schedule a free estimate.
You can try, but vinyl windows rarely pass Marin County design review on a Craftsman or estate home, and the frame corners tend to swell and fail within a few shaded seasons. We recommend clad-wood units with simulated divided lites that match the original profile and hold a marine-grade finish. The price is higher, but the window lasts decades instead of a few years. Call (888) 635-0804 and we’ll quote both specs on paper.
For Kentfield homes under dense oak and redwood canopy, we recommend higher visible-light transmission glass with a low-e coating tuned to your orientation. Shaded lots need glass that lets in light without sacrificing the thermal seal. Homes on southern-exposure upslope streets get a different low-e spec to cut heat gain. We’ll match the glazing package to your lot and show you the performance numbers side by side. Estimates are free at (888) 635-0804.
We flash Kentfield windows with marine-grade flashing tape, stainless-steel pan corners, and a sealed sill pan that stands up to months of wet duff contact. The pan corners are stainless because zinc corrodes in Kentfield’s acid-laden duff moisture. The flashing laps over the pan so water drains outward, not into the king studs. This is the same detail we used on a 1930s Craftsman above College Avenue where duff had rotted the original framing. If your current windows were not flashed this way, the rot is spreading. Call (888) 635-0804 for an inspection and a written quote.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Kentfield and the surrounding Ross Valley.



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