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Fast, Reliable Window Replacement Across Corte Madera
Window replacement in Corte Madera typically costs $850-$2,400 per opening for insert work and $1,600-$4,200 per opening for full-frame replacement, depending on whether salt corrosion has compromised the rough opening. Most bayside Corte Madera homes need full-frame work rather than inserts because the original aluminum sliders have seized, the jambs have wicked moisture, and the rough openings fall short of today’s code minimums. That’s what we see on at least two out of three estimates in the 94925 zip code. If you’re looking at a fogged seal, a slider that won’t lock, or a frame pitted from bay air, call (888) 635-0804 and we’ll walk you through what the job will actually involve before anyone touches a wall.
Why TruePane Windows & Doors Is Corte Madera’s Preferred Window Replacement Company
Dale Kessler founded TruePane in 2008 on a rule that still governs every install we do: if the pane is not true, the job is not done. That rule matters more in Corte Madera than almost anywhere we work, because the eastern half of town sits close enough to the tidal marshes that bayside salt air pits aluminum frames within ten to fifteen years instead of the twenty to twenty-five you’d expect a few miles inland. We plan every Corte Madera job around that corrosion timeline. We don’t quote inserts when a full-frame replacement is what the wall actually needs, and we don’t spec materials that the marsh air will eat through before the warranty runs out.
We’re not the cheapest bid you’ll get in Corte Madera, and we don’t try to be. What we are is the company that answers the phone when you call, sends a background-checked technician in a uniform, and puts both warranty layers in writing before the truck leaves your driveway. Homeowners around Corte Madera call us because they’ve already been through the other kind of window company: the one that measured once, disappeared for six weeks, and left a slider that binds every July. We’ll be there when we say.
Our Window Replacement Services in Corte Madera
Full Frame Replacement
Most of the ranch homes in Corte Madera’s bayside neighborhoods were built in the 1950s and 1960s with aluminum-frame sliders set into rough openings that are smaller than what California code allows today. The first time we open one of those walls, the old jamb is usually swollen and the opening needs to be reframed. Full-frame replacement is the honest fix: we pull the entire old unit, correct the rough opening to current code, replace any rotted or undersized framing, properly flash the opening, and set a new window that actually seals. In Corte Madera, we spec fiberglass or cellular PVC frames as the baseline for any full-frame job within a half-mile of the marsh. The bay air is too corrosive for standard extruded aluminum.

Insert Window Replacement
An insert replacement is a new window set into an existing frame that’s still structurally sound. In Corte Madera, inserts make sense on homes where the original framing is dry, square, and undamaged, and where the existing rough opening already meets code. That’s more common on the west side of town and in parts of the 94925 zip code that sit above the worst of the marine layer. We measure every opening twice, check the sill with a level, and if the frame won’t support an insert, we tell you before you spend a dollar on a window that’ll fail early.

Storm Window Replacement
Storm windows matter in Corte Madera less for cold than for wind and salt-driven moisture. The prevailing breezes off San Francisco Bay push a steady stream of damp, saline air across the eastern streets, and a failing storm window means moisture getting to the primary sash. We install and replace storm windows with corrosion-resistant hardware and compression gaskets that actually keep that air out. If your existing storms are single-pane aluminum and the sashes rattle, that’s not a repair job. That’s a signal the whole unit has reached the end of its life.

Energy-Efficient Upgrade
Corte Madera sits in California Title 24 Climate Zone 3, which sets mandatory U-factor and SHGC thresholds for any permitted window replacement. The original single-pane aluminum sliders in most of these 1950s and 1960s ranch homes don’t come close to meeting that standard, and neither do the first-generation replacement windows a lot of homeowners put in back in the 1990s. An energy-efficient upgrade to double-pane low-E glass with argon fill knocks back the marine-layer heat loss that keeps these older homes cold in summer and damp-feeling in winter. It also meets the code that the permit inspector will check.

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.
Why Salt Air on the East Side of Corte Madera Changes the Spec
Corte Madera’s eastern residential streets sit directly adjacent to San Francisco Bay tidal marshes, and that geography drives a corrosion problem most window companies never mention because they don’t work here regularly. Salt-laden bay breezes move through those neighborhoods year-round, pitting powder-coated aluminum and eating through sill hardware at a rate that surprises homeowners who grew up inland. We routinely replace aluminum windows on bayside streets that have pitted and seized within ten to fifteen years of installation. That’s not a bad brand. That’s the environment. The fix is a different material: fiberglass or cellular PVC frames with stainless steel hardware, which is what we spec on any Corte Madera job east of Highway 101 and within a half-mile of the marsh. We’ve seen the difference a few blocks make. The same window that lasts twenty years up by the hills toward Larkspur can look like it’s been in seawater for a generation down by the bayfront.
What Opening a Corte Madera Wall Actually Turns Up
On a 1950s ranch in the bayside neighborhood near the marsh, our crew opened the wall around an original single-pane aluminum slider and found the rough opening undersized, the jamb swollen from water that had wicked past a failed flashing tape, and the sill hardware corroded to the point of seizure. We reframed to current code, wrote the change order before touching the studs, and installed a fusion-welded fiberglass double-hung with low-E glass and argon fill that finally met Title 24 U-factor and SHGC for Climate Zone 3.
That job is the norm, not the exception, on Corte Madera’s older homes. Here’s what a window replacement in this town actually involves once the wall is open:
- Undersized rough openings. Many original 1950s and 1960s rough openings run smaller than today’s code minimum. An insert becomes a full-frame replacement the moment the old jamb comes out and the real dimensions show up.
- Failed waterproofing behind stucco. Marine-layer moisture works its way past old flashing tape and into the framing. The permit inspection catches the rot only after the wall is open, and that doubles the scope if it wasn’t already priced.
- Corroded sill hardware. On bayside streets, salt air eats through sill tracks and locking mechanisms within a decade. You can’t rebuild a seized sill. The unit gets replaced.
- Title 24 obligations. In Climate Zone 3, any permitted replacement must meet current U-factor and SHGC requirements. The original single-pane aluminum units don’t. The job has to include glass that does.
How We Handle the Unknowns Before They Become Change Orders
Every window company hopes the wall is clean when they open it. We plan for what Corte Madera walls actually contain. That starts with an inspection before the estimate, not after. We look at the condition of the existing frame, check the sill for level and rot, and measure the rough opening if it’s accessible. When we write the contract, we include a written allowance for the framing repairs and waterproofing corrections these older bayside homes predictably need. If a change order is required once the wall is open, it’s priced and approved in writing before we touch a stud. No surprise line items on the bill. No second appointment left hanging. That’s a square deal, and it’s the only way we’ve worked since 2008.
Trusted Brands We Install in Corte Madera
We’re an authorized installer for more than a dozen manufacturer lines, including, PGT, CGI, and ES Windows. For Corte Madera specifically, we lean on PGT and CGI for impact-rated options that hold up to the bay wind, and fiberglass lines that resist the salt profile. We quote manufacturer lines side by side on paper so you can see exactly what you’re buying, and we register both warranty layers before the truck leaves the driveway. If the pane is not true, the job is not done, and that applies to every brand we set.
Common Window Replacement Problems We See in Corte Madera Homes
- Salt-driven frame corrosion on bayside streets. Homes east of Highway 101 and close to the marsh get a steady load of salt-laden air that pits aluminum and seizes hardware years ahead of schedule. The fix is a corrosion-resistant frame, not another aluminum unit.
- Fogged seals on first-generation replacements. A lot of Corte Madera homeowners replaced their original windows in the 1990s with double-pane units that have since lost their seal. The fog between the panes is permanent once the desiccant is saturated.
- Sliders that won’t lock or slide. Dirt, salt film, and corroded tracks work together until the sash binds. On older units, the hardware can’t be rebuilt, and the whole unit needs replacing.
- Drafts through original single-pane ranch sliders. Even when the frame hasn’t corroded away, these 60-year-old units offer almost no resistance to the marine layer. The heat loss is constant, and the permit requires better glass on any replacement.
Pricing for Window Replacement in Corte Madera, CA
A typical insert window replacement in Corte Madera runs $850-$2,400 per opening for standard double-pane low-E units, installed. Full-frame replacement on these older ranch homes typically runs $1,600-$4,200 per opening, with the higher end covering reframing, waterproofing correction, and corrosion-resistant frame material. Storm window replacement mostly falls between $450 and $1,100 per unit. Energy-efficient upgrades to Title 24-compliant glass add $150-$400 per opening over code-minimum glass, depending on the coating and gas fill. What moves the number in Corte Madera more than anything is what’s behind the old window. A home with dry, square framing costs less. A bayside home with swollen jambs and corroded sills costs what it costs to do right. Call (888) 635-0804 for a free estimate, and we’ll give you written line-item pricing before you sign anything.
We Also Serve Cities Near Corte Madera
TruePane’s crews work throughout central Marin. If you’re in Larkspur, Mill Valley, Kentfield, or San Rafael, you’re in our regular service area, and the same Window Replacement standards apply. For specifics on what we see and spec in this part of the county, see our full Window Replacement in Corte Madera guide. Dispatch and scheduling for the area are coordinated from our San Francisco Bay Area office, and a live person answers every call.
Serving Corte Madera, CA - Our Local Coverage Area
We’re based in the Corte Madera 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 Corte Madera
The eastern residential streets of Corte Madera sit directly against the tidal marshes of San Francisco Bay, and the salt-laden air that moves through those neighborhoods attacks aluminum window frames at roughly twice the rate seen in inland Marin towns. We regularly see frames pitted and hardware seized within ten to fifteen years of installation. That’s why we spec fiberglass or cellular PVC frames for any job within a half-mile of the marsh. Call (888) 635-0804 for an exact assessment of your home’s exposure.
Yes, any permitted window replacement in Corte Madera must meet California Title 24 Climate Zone 3 requirements for U-factor and SHGC, and the original single-pane aluminum units don’t come close. The good news is that dual-pane low-E glass with argon fill meets code and makes these older homes noticeably more comfortable. We’ll price the code-compliant glass into your estimate from the start.
Expect undersized rough openings, rotted framing from failed flashing, and corroded sill hardware on bayside homes. Those are the three things we find most often when we open a wall in Corte Madera’s 1950s and 1960s housing stock. We write a framing and waterproofing allowance into the contract up front so a change order is a signature, not a surprise. Call (888) 635-0804 to schedule an inspection and get the full picture before work begins.
In most cases you can keep the original wood sashes and bring them up to performance with a restoration approach: reglazing, new weatherstripping, rebuilt sills, and storm units where the design calls for them. Corte Madera doesn’t have a formal preservation ordinance requiring window retention, but a lot of homeowners choose restoration on character homes. We’ll tell you honestly whether restoration makes sense on your house or whether replacement is the better spend.
Fog between the panes means the seal has failed and moisture has gotten into the air space, which is permanent once the desiccant inside the spacer is saturated. In Corte Madera’s marine climate, seal failures happen faster when windows get a steady salt film around the frame edge, which encourages the failure point. The fix is replacing the insulated glass unit or the whole sash, not wiping the glass. Call (888) 635-0804 and we’ll assess whether a glass-only replacement is viable or a full unit makes more sense.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Corte Madera across the 94925 zip code.



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