Free in-home measure and quote - PGT, CGI and CWS impact lines compared on your actual openings, style by style
Fast, Reliable Custom Windows & Doors Across Merced
Custom windows and doors in Merced run $1,850-$7,200 per opening depending on size, glass spec, and frame material, with most permitted replacements on acreage properties landing between $2,400 and $4,800. That is the honest range, and it reflects the reality that Merced sits in CEC Climate Zone 13, where west- and south-facing custom windows must meet a 0.25 SHGC maximum or they will not pass Title 24 inspection. We have been measuring, fabricating, and setting custom units in 95340 long enough to know which specs survive both the county inspector and a 105°F July afternoon. If you are pricing a window or door that is not off-the-shelf, call (888) 635-0804 for a written, line-item estimate before you commit to anything.
Why TruePane Windows & Doors Is Merced’s Preferred Custom Windows & Doors Company
TruePane has been in the Central Valley for decades, and our custom work in Merced runs through the same crews, the same standards, and the same live phone line we use everywhere else. Dale Kessler founded this company on a rule that still governs every install: if the pane is not true, the job is not done. That means a background-checked, uniformed technician measures every opening twice, registers both manufacturer warranty layers in writing before leaving the driveway, and stands behind the work with the Done Right Promise.
We know Merced’s housing stock. Central 95340 is full of 1950s-to-early-1980s ranches still carrying original single-pane aluminum sliders and hollow steel doors. The mid-2000s subdivisions north and northeast of town, built during the UC Merced expansion, are now at the 15-to-20-year mark where vinyl seals and door hardware fail under sustained valley heat. A live person answers our phone 24 hours a day, 7 days a week, and when a Merced homeowner calls about a fogged picture window or a binding patio door, they talk to someone who knows what a tule-fog winter does to a seal.
Our Custom Windows & Doors Services in Merced
Custom work is what gets us out of bed. If a window or door is not a standard size, not a standard shape, or not a standard spec, that is where we do our best work. Here is what we handle most in Merced.
Oversized Glass Panels
Big glass on a big lot sounds simple until you are on a 5-acre parcel off Gurr Road and the nearest power drop is 400 feet from the pad. We have set 12-foot sliding doors and oversized picture windows in detached ADUs and custom ranches across 95340. The engineering is the easy part. The logistics – crane access, temporary bracing, glazing a 300-pound unit square on the first try – is where most bids fall apart. Our crews pre-order flashing tape and stainless hardware, stage deliveries around fog weeks, and keep a portable generator on-site when the job calls for it.

Custom Shape Windows
Arched, radius, trapezoid, octagon, half-round – Merced’s 1970s ranches are full of non-standard openings that big-box stores will not touch. We fabricate to the exact radius and rough opening, not the nearest catalog size. That matters because a 1970s arched window on a west-facing wall in Climate Zone 13 still has to hit the 0.25 SHGC cap. We spec low-SHGC dual-pane with argon fill as the default on any custom shape, so the window passes inspection and actually holds a seal through 60°F daily temperature swings.

Architectural Grilles & SDLs
Simulated divided lites and architectural grilles let a Merced homeowner keep the craftsman or mid-century look of their home’s original windows while getting modern thermal performance. We quote these side by side on paper against true divided lite options, so you see exactly what each costs and what each saves in energy. The right grille profile on a low-SHGC custom unit is the difference between a window that looks correct on a 1960s ranch and one that looks like a replacement.

Commercial Storefront Glazing
Downtown Merced storefronts and office builds along the Highway 99 corridor need custom glazing that meets commercial code and survives agricultural dust. We handle storefront framing, glass replacement, and curtain wall systems with the same warranty registration discipline we bring to residential work. Both manufacturer warranty layers go in writing before the truck leaves the job site.

Curtain Wall Systems
For larger commercial or mixed-use projects in Merced, curtain wall work demands engineered framing, proper anchoring, and glazing that can withstand sustained thermal cycling. We quote manufacturer lines side by side, including CWS and ES Windows, so the building owner sees the real numbers and the real performance ratings before signing.

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 Merced
We are an authorized installer for more than a dozen manufacturer lines, and for Merced custom work we lean heavily on for residential, with CGI, CWS, and ES Windows covering impact and commercial applications. We do not push one brand. We quote side by side on paper so you see the SHGC, U-factor, and price on each line. For Merced’s Climate Zone 13, where a 0.25 SHGC cap eliminates a lot of stock windows from code compliance, the brand list narrows quickly – and we stock the local parts and glass packages that actually meet that spec. There is no waiting on a warehouse in another state when a seal fails right before inspection.
Common Custom Windows & Doors Problems We See in Merced Homes
- IGU seal failure on south-facing custom windows. The daily 60°F swing between Merced’s 30°F fog mornings and 105°F afternoons cycles glass and frame materials through constant expansion and contraction. Insulated glass seals fail within 8-12 years on south-facing units, and the first sign is fogging that never clears.
- Agricultural dust clogging oversized sliding door tracks. Harvest chaff, dust, and pesticide residue from surrounding farmland drift across Merced acreages year-round. On a 12-foot slider, that grit works into weatherstripping, abrades the seal, and leads to air infiltration and eventual jamb warping.
- County permit failures on acreage replacements. Merced County permitting on properties with septic and well setbacks is stricter than city permitting in town. Incorrect flashing or a non-compliant SHGC will fail the inspection, and the homeowner pays for re-work.
- Vinyl frame seal breakdown in 15-20-year-old subdivisions. The mid-2000s tracts north and northeast of Merced are hitting the age where original vinyl frames and door hardware are failing under sustained Central Valley heat. Seals shrink, corners separate, and the window loses any meaningful thermal barrier.
Pricing for Custom Windows & Doors in Merced, CA
Custom window pricing in Merced runs roughly $1,850-$4,200 per opening for standard custom shapes in vinyl or mid-grade aluminum, and $2,600-$7,200 per opening for oversized panels, 12-foot sliding doors, and picture windows with low-SHGC dual-pane, argon fill, and custom dimensions. Architectural grilles and SDLs typically add $250-$600 per window depending on profile and layout. Commercial storefront glazing and curtain wall systems run $65-$140 per square foot installed, depending on framing and glass spec. What pushes a Merced job to the upper end: acreage logistics like long hauls from the road, generator and crane rentals, county permitting with septic and well setbacks, and non-standard shapes that need true fabrication rather than a stock unit tweaked to fit. We give a written, line-item quote before any work starts, and the Done Right Promise covers the workmanship on every job. Call (888) 635-0804 for a free estimate.
We Also Serve Cities Near Merced
Our custom window and door crews serve Custom Windows & Doors customers across Atwater, Winton, Livingston, and Chowchilla, with the same permitting knowledge, warranty registration, and upfront pricing we bring to every Merced job.
Serving Merced, CA - Our Local Coverage Area
We’re based in the Merced 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 - Custom Windows & Doors in Merced
Yes. Most window replacements on Merced County acreage require a county permit, and the process is different from city of Merced permitting in one important way: county inspectors check window specs against the property’s full site plan, including septic and well setbacks. Incorrect flashing or a non-compliant SHGC on a west-facing window will fail the inspection, and the fix usually means pulling the window and re-setting it. We pull permits on every job where they are required, and we quote the permit line item up front. Call (888) 635-0804 for an exact quote on your property.
West- and south-facing replacement windows in Merced must have a Solar Heat Gain Coefficient of 0.25 or lower to pass Title 24. That is tighter than coastal zones, and it eliminates most standard big-box window SKUs from code compliance. The practical default for any permitted custom window in Merced is low-SHGC dual-pane with argon fill, sized to the exact opening rather than a catalog dimension. For an exact quote on your opening, call (888) 635-0804.
Yes, if it is built to the right spec. The failure we see most in Merced is an insulated glass unit with a cheap seal and no argon fill, cycling through 60°F daily temperature swings until the seal cracks and the unit fogs within 8-12 years. A properly fabricated custom unit with a quality IGU seal, argon fill, and a frame material sized for thermal expansion will hold. We register both manufacturer warranty layers in writing so the seal warranty is stated, in your name, before the install is finished. Call (888) 635-0804 to talk through specs.
Plan for equipment access, power, and staging before you plan for glass. On a recent Merced county job, we replaced a 12-foot sliding glass door and two oversized picture windows in a detached ADU off Gurr Road, sized with a 0.23 SHGC and U-factor 0.27. We scheduled the swap to avoid two weeks of tule-fog mornings, pre-ordered flashing tape and stainless hardware before final county inspection, and ran a portable generator because the nearest power drop was 400 feet from the pad. The price changes when a crane has to reach 300 feet from the road or when the site has no power. We scope all of that before we quote, so the number on paper is the number you pay. Call (888) 635-0804 for a free site visit.
Yes. That is exactly the kind of work we do most in central 95340, where 1970s ranches carry arched and radius openings that do not match any stock window SKU. We fabricate to the exact rough opening, and we spec the glass to pass Merced’s 0.25 SHGC requirement on west- and south-facing walls. The result is a window that looks original and meets current code. Call (888) 635-0804 to schedule a measurement.
Contact TruePane Windows & Doors in Merced
If you are on acreage around Merced, or if you have a window or door opening that is not a standard size, call (888) 635-0804. We will talk through the specs that survive Climate Zone 13 inspection and a septic-and-well setback, then give you a written, line-item estimate. No pressure, no vague promises, no fine print. The pane is either true or it is not, and we stand behind ours in writing.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Merced with custom window and door craftsmanship rooted in years of glazing work.



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