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 Cotati
Impact windows and doors in Cotati run roughly $900-$2,800 per opening installed, depending on the product line and what our crews find once the old unit comes out. Most Cotati homes we work on were built between 1963 and 1985, which means we’re typically replacing original aluminum single-pane sliders that have taken forty-plus years of Petaluma Gap wind. We know these houses. We know what’s behind those walls. Call (888) 635-0804 and we’ll schedule a free estimate, measure every opening twice, and quote manufacturer lines side by side on paper.
Why TruePane Windows & Doors Is Cotati’s Preferred Impact Windows & Doors Company
TruePane Windows & Doors was founded in 2008 by second-generation glazier Dale Kessler, and the crew serving Cotati has spent years opening up the kind of tract housing this city is made of. We’re not a franchise operation running crews through a rotating route. Our technicians are background-checked, uniformed, and trained as apprentices into journeymen because we plan to be in Cotati in thirty years still answering the phone.
Customers in the 94931 zip code keep calling us back because we do what we say. Every job carries our Done Right Promise. Both manufacturer warranty layers get registered in writing before the truck leaves the driveway. Durations are stated, not assumed. If the pane is not true, the job is not done. That’s the standard Dale Kessler keeps on the whiteboard, and it applies to every opening we touch in Cotati.
We understand how Cotati’s weather works against west-facing openings specifically. That’s not something a generic installer figures out the first week on the job. That’s something you learn after a hundred houses off Gravenstein Highway and La Plaza and Old Redwood Highway. We’ve learned it.
Our Impact Windows & Doors Services in Cotati
We install, replace, and service Impact Windows & Doors across Cotati’s neighborhoods, from the post-incorporation tracts west of Highway 101 to the older streets around Cotati’s downtown core. Most of what we do falls into four areas.
Hurricane Impact Windows
Full-frame impact window replacement is the most common job we do in Cotati. The original aluminum single-pane sliders and casements that went into 1960s and 1970s tract homes were never designed for the sustained westerlies that funnel through the Petaluma Gap every afternoon. They rack, they bind, they condense. We replace them with fusion-welded impact-rated units, usually in vinyl or aluminum, sized to the existing rough opening where the framing is sound. A typical three-bedroom Cotati house with eight to twelve openings will run $8,000-$22,000 installed, with west- and southwest-facing openings priced as a higher-labor line item because we expect to find framing work behind them.

Impact Sliding Glass Doors
Sliding glass doors in Cotati take a beating that most other elevations never see. The same afternoon winds that rack window frames also push against wide glass panels, wearing tracks unevenly and turning a once-smooth slider into something you have to shoulder open. We install impact-rated sliders with heavier-duty rollers and reinforced tracks, and we spec hardware differently depending on which wall the door sits on. An impact slider in Cotati typically runs $2,200-$5,500 installed, more if the opening needs reframing to meet current wind-load code.

Impact Entry & French Doors
Cotati’s original hollow-core and steel-skin exterior doors have long since lost their sealing integrity. Fog off the Pacific works its way in, steel skins corrode along the bottom rail, and wood jambs rot where moisture settles. We install impact-rated entry and French doors that actually seal, with composite or reinforced frames that hold their shape when the afternoon wind hits. Entry door replacement in Cotati runs $1,800-$4,200; French doors run $3,500-$7,500 depending on configuration and glass package.

Wind Mitigation & Code Compliance
This is where Cotati-specific knowledge matters most. When we pull a permit for full-frame replacement on a 1960s or 1970s tract house, the inspection will look at shear and wind-load requirements that didn’t exist when the house was built. We’ll flag what’s likely to come up before we start, write allowances into the contract, and price any surprise in writing before we touch it. If the opening needs a bigger header or additional hold-downs, you’ll know what it costs and why before the saw comes out.

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 Cotati
TruePane is an authorized installer for more than a dozen manufacturer lines, including, PGT, CGI, and ES Windows. For Cotati’s wind exposure, we most often quote CGI, ES Windows, and PGT side by side on paper so you can see exactly what you’re buying and compare glass packages, frame materials, and warranty durations line by line. We keep common parts stocked for Cotati customers, which means less waiting when a roller or a lock needs attention on short notice.
Common Impact Windows & Doors Problems We See in Cotati Homes
- West-facing aluminum sliders that rack and bind. Cotati’s west and southwest elevations take the brunt of Petaluma Gap wind pressure. We regularly pull sliders that are visibly out of square, with corner seals blown and tracks grooved from years of wind-driven sash chatter.
- Heavy condensation on single-pane glass. The marine layer that settles over Cotati on summer nights leaves original single-pane windows dripping. That moisture seeps into wood jambs, rots subsills, and corrodes steel door skins from the inside out.
- Sliding door tracks worn unevenly on the windward side. It’s a failure pattern you rarely see in sheltered towns like Windsor or Healdsburg. In Cotati, it’s routine. The track wears more on one side because the wind constantly pushes the sash in one direction.
- Undersized or deteriorated framing behind old openings. Impact retrofits on 1960s and 70s tract homes often reveal framing that was minimally adequate when built and now fails current shear and wind-load codes. We handle this head-on, with inspection first and written allowances in the contract.
Pricing for Impact Windows & Doors in Cotati, CA
Here’s what you should expect to budget in Cotati. Impact windows run $900-$2,800 per opening installed. Impact sliding glass doors run $2,200-$5,500. Entry doors run $1,800-$4,200; French doors run $3,500-$7,500. Full wind mitigation retrofits with code-compliance work on a typical 1970s tract home will push the project total higher because the permit triggers upgrades the house never had.
What moves the number: whether the opening needs full-frame replacement or the existing frame is sound enough for an insert, which elevation the opening sits on, and what our inspection finds behind the old unit. West-facing work assumes more labor because we typically find racked jambs and rotted subsills. We quote all of it on paper before you sign, and the price we agree on is the price you pay unless we discover something and price it in writing before touching it. Call (888) 635-0804 to schedule your free estimate.
We Also Serve Cities Near Cotati
Our crews serve Cotati and the surrounding Sonoma County communities. We handle Impact Windows & Doors in Cotati as well as Rohnert Park, Petaluma, Santa Rosa, and Sebastopol, so if you’re just outside city limits, we still work in your neighborhood. The same crew, the same Done Right Promise, the same standard.
Serving Cotati, CA - Our Local Coverage Area
We’re based in the Cotati 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 Cotati
Yes. Cotati sits in the Petaluma Gap wind corridor, and persistent afternoon westerlies hammer west- and southwest-facing openings every day. We see racked frames, cracked corner seals, and uneven track wear on west-facing windows and doors that east-facing units in the same house never develop. It’s our experience that a west-facing aluminum slider in Cotati will show real damage ten to fifteen years before an east-facing one of the same age. Call (888) 635-0804 and we can inspect yours.
The whistle is almost always air passing through a failed seal or a warped frame channel. What you’re hearing is wind-driven pressure finding a gap you can’t see: a worn weatherstrip, a hairline frame crack, or a sash that has racked just enough to let air move around it. In Cotati, the afternoon wind makes this problem audible in a way it never would be in a calmer inland spot. The fix could be a weatherstrip and hardware adjustment, or full replacement if the frame has lost its shape. When you call (888) 635-0804, we’ll tell you which one you actually need.
Yes, and that is exactly how it should work. A full-frame replacement changes the rough opening, and after any fire, wind, or water damage that the demo reveals, the inspector will hold the new assembly to today’s standards. We anticipate those upgrades before the job starts, write allowances into the contract, and price any further surprise in writing before we touch it. We don’t discover code upgrades; we plan for them. Call (888) 635-0804 to get a sense of what your specific house will require.
First, we photograph it and show you. Then we price it in writing before we remove anything further. On a 1972 tract home off La Plaza, our crew pulled an original aluminum single-pane slider on a west-facing wall and found the jamb racked 3/16 inch out of square, the corner seal blown, and the track grooved from years of wind-driven sash chatter. We replaced it with a fusion-welded impact-rated casement, flashed the opening with butyl tape, and rebuilt the rotted subsill before reinstalling the interior trim. The homeowner told us the old unit howled every afternoon; the new one doesn’t even whistle at 30 mph gusts. Hidden rot is common in Cotati, and we handle it the same way we handle everything: in writing, with your approval, before the next cut happens. Call (888) 635-0804 and ask us how we’d approach your house.
For Cotati, impact windows are not about hurricanes. They are about wind-driven debris, but mostly they are about the same wind and marine moisture that has been eating your original windows for fifty years. Impact-rated windows seal tighter, resist racking, and hold their structure under sustained gusting far better than standard dual-pane units. Given Cotati’s specific climate and the age of the housing stock here, they make solid practical sense. Call (888) 635-0804 and we’ll help you compare the numbers, no pressure.
Need a straight answer about your Cotati windows and doors? Call (888) 635-0804 for a free estimate. A live person answers the phone 24 hours a day, 7 days a week. We’ll measure twice, quote manufacturer lines side by side on paper, and register both warranty layers before the truck leaves the driveway.
Written by Dale Kessler, Owner at TruePane Windows & Doors.



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