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 Novato
Window replacement in Novato isn’t a one-size job. The ranch houses off San Marin Drive, the canal homes in Bel Marin Keys, and the converted military quarters in Hamilton each bring their own framing, flashing, and code issues. TruePane Windows & Doors has worked through all of them. We know which Novato homes hide undersized headers, which west-facing elevations catch the worst afternoon wind, and where salt air eats aluminum frames years ahead of schedule. Call (888) 635-0804 and you’ll get a live person, a straight answer on timing, and a written estimate that holds.
Why TruePane Windows & Doors Is Novato’s Preferred Window Replacement Company
We’ve been doing window and door work in Marin since 2008, led by Dale Kessler, a second-generation glazier who founded TruePane in 2008 on a rule that hasn’t changed: if the pane is not true, the job is not done. Novato homeowners call us because our technicians show up in uniform, measure every opening twice, and write both manufacturer warranty layers into the contract before the truck leaves the driveway. That’s The Keystone Standard, and it means you know exactly what’s covered and for how long. No verbal promises, no fine print that covers neither.
Our Novato customers don’t deal with a voicemail tree or a regional call center. A live person answers the phone 24 hours a day, 7 days a week. When a Bel Marin Keys homeowner calls about a fogged canal-facing casement, the person who picks up can talk about salt-air oxidation and flashing failure specifically, because we’ve replaced those windows before. That’s local knowledge you can’t get from a franchise playbook. Every job is also covered by our Done Right Promise: if it’s not done right, we make it right. No paperwork fights, no arguing.
Our Window Replacement Services in Novato
Full Frame Replacement
Most 1960s and 1970s tract homes in Novato still have original aluminum single-pane windows, and pulling those frames often uncovers what’s behind them: undersized headers, hidden wiring runs, and degraded waterproofing. We inspect the rough opening before we quote, not after we’ve opened the wall. That way, any code upgrade the permit triggers is written into the contract as a line-item allowance, not a surprise change order. Full frame replacement in Novato lets us correct the opening properly, install new flashing, and set a window that operates square and seals tight.

Insert Window Replacement
When the existing frame is still square and the surrounding stucco or siding is in good shape, an insert replacement often makes more sense. This is common in Novato’s ranch-style neighborhoods, where the exterior condition is solid but the sashes and glass are shot. We measure each opening twice, order the insert to fit, and leave the surrounding trim intact. It’s less invasive, faster, and typically more affordable, but we’ll tell you honestly if the frame underneath is too far gone for an insert to perform.

Storm Window Replacement
West- and northwest-facing elevations in Novato catch the strong afternoon marine winds that channel through the valley between the surrounding hills. Deteriorated storm windows and old aluminum flanges let wind-blown rain behind the jamb, and by the time you see the water stain inside, the flashing has usually failed already. We replace storm windows with properly flashed units rated for Novato’s wind exposure, and we inspect the sill and rough opening for hidden rot before we set anything.

Energy-Efficient Upgrade
Novato sits in an interior Marin valley, and summer afternoons here run noticeably hotter than Mill Valley or Sausalito. That heat soak is brutal on aging double-pane units from the 1990s retrofit wave – we regularly see thermal-seal failure, fogged glass, and lost argon fill in windows that face south and west. An energy-efficient upgrade with low-E glass and proper gas fill changes both the comfort and the utility bill. In Ignacio and San Marin, where original aluminum frames conduct heat straight through, the difference is immediate.

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 Novato
TruePane is an authorized installer for more than a dozen manufacturer lines, and for Novato’s conditions we often quote PGT, ES Windows, and CGI side by side on paper so you can see exactly what you’re buying. For canal-facing homes in Bel Marin Keys, we steer customers toward fiberglass or vinyl frames with composite hardware, because aluminum-clad products simply will not survive the salt-air exposure. We register both warranty layers in writing before we leave your driveway, and we carry local inventory and parts access that keeps turnaround tight for Novato jobs.
Common Window Replacement Problems We See in Novato Homes
- Corroded aluminum frames in Bel Marin Keys: Salt air off San Pablo Bay oxidizes aluminum window frames and steel hardware faster than anywhere else in Marin County. We’ve seen heavy pitting and frame failure within 8 to 12 years on canal-facing elevations.
- Failed flashing on west and northwest elevations: The afternoon marine winds that funnel through Novato’s valley drive rain against deteriorated window flanges and door sills. Once flashing tape fails, water gets behind the jamb and rots the rough opening.
- Thermal-seal failure in 1990s retrofit windows: Novato’s hot interior summer afternoons bake double-pane units until seals fail and argon fill leaks out. Fogged glass on south- and west-facing windows is the telltale sign.
- Original aluminum single-pane windows citywide: The 1960s and 1970s suburban expansion from Ignacio to San Marin left large tracts of ranch and split-level homes with original aluminum windows now past their service life. These frames conduct heat, corrode at the corners, and no longer seal against Novato’s afternoon winds.
Pricing for Window Replacement in Novato, CA
A typical full frame replacement in Novato runs $900-$1,900 per window, depending on size, frame material, and what we find when the old frame comes out. Insert replacements generally run $500-$1,100 per window. Storm window replacement in a standard Novato ranch typically lands between $350 and $750 per unit. Energy-efficient upgrades with low-E glass and proper gas fill add roughly $150-$400 per window over base pricing. The wild card in Novato is the rough opening: hidden water damage, undersized headers, or outdated wiring that a permit triggers can move a quote, and that’s why we inspect first and write allowances into the contract before you sign. Call (888) 635-0804 for a free, written, line-item estimate.
We Also Serve Cities Near Novato
TruePane serves homeowners throughout central and northern Marin. You’ll find our crews in Novato regularly, and we also run jobs in Fairfax, San Anselmo, Petaluma, and San Rafael. Our Window Replacement team covers the same territory with the same technicians and the same written warranty standards.
Serving Novato, CA - Our Local Coverage Area
We’re based in the Novato 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 Novato
Bel Marin Keys homes sit on man-made canals that drain to San Pablo Bay, and the constant salt-air exposure oxidizes aluminum frames and steel hardware far faster than inland Novato neighborhoods. We routinely see heavy pitting on canal-facing elevations within 8 to 12 years. That’s why we quote fiberglass or vinyl frames with composite hardware as the starting point there, not an upsell. One of our crews recently replaced a corroded aluminum double-hung in Bel Marin Keys with a fiberglass casement after the original frame showed severe pitting in under ten years. When we pulled the sash, the flashing tape had failed on the canal-facing elevation, letting wind-driven rain behind the jamb. The new flashing and composite hardware restored a dry, operable window without touching the home’s 1960s stucco. If you’re seeing white powder or pitting on your window frames near the water, call (888) 635-0804 and we’ll tell you straight what will and won’t survive out there.
Full-frame replacement in a 1960s ranch often triggers code upgrades the moment the wall is open, including tempered glass for windows near doors or low sills, enlarging undersized egress openings in bedrooms, and bringing hidden wiring runs up to current code if they’re exposed in the rough opening. This is the single biggest reason a window quote moves, and it’s why TruePane inspects the rough opening before we quote and writes allowances into the contract. If a surprise shows up after the frame comes out, it gets priced and approved in writing before we touch it. Call (888) 635-0804 for an inspection-based estimate.
Yes. Parts of Hamilton were converted from 1930s and 1940s military buildings, and homes in the historic district often trigger Marin County design-review requirements for historically compatible window profiles before replacement can proceed. That can affect frame material, muntin profile, and color, and it can add review time to the permit process. We’ve handled design-review submittals for Hamilton homeowners and can guide you through what the county will want to see. Call (888) 635-0804 and we’ll tell you what applies to your specific building.
Novato’s interior valley location runs noticeably hotter on summer afternoons than coastal Marin towns like Mill Valley, and that heat accelerates thermal-seal failure in double-pane units. South- and west-facing windows absorb the most sun, and we see fogged glass and lost argon fill in 1990s-era retrofits that are still clear in cooler coastal microclimates. The fix is a properly rated low-E unit with the right gas fill for Novato’s heat load, not just a same-size replacement. Call (888) 635-0804 and we’ll spec the right glass for your elevation.
We stop, document what we found, and bring you a written price to repair the damaged framing, flashing, or sheathing before we set the new window. Novato’s afternoon winds push rain hard against west- and northwest-facing elevations, so hidden water damage behind failed flashing is common in split-levels from the 1970s. The repair gets priced and approved in writing before we proceed; you never get a surprise line item after the fact. Call (888) 635-0804 for a free estimate that includes a rough-opening inspection.
Schedule Your Free Novato Window Replacement Estimate
If your Novato home has original aluminum windows, fogged double panes, or frames that are starting to pit and corrode near the water, we’ll come out, measure every opening twice, and give you a written line-item estimate with manufacturer warranties registered in writing. Call (888) 635-0804 now and ask for a free estimate. A live person answers, and we’ll be there when we say.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Novato and Marin County since 2008.



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