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 La Coste
Window installation in La Coste, TX runs $480-$1,850 per window for most homes here, with full-frame replacement on older ranch houses landing between $850 and $1,850 depending on what we find when the old unit comes out. Most jobs take one day once we have the right window in hand. If you’re calling from a 1960s brick ranch off North Front Street or a newer place along the US-90 corridor where the exurbs are creeping in, we know exactly what your walls are hiding. Call (888) 635-0804 and we’ll walk you through what to expect before anyone picks up a pry bar.
We serve the whole 78039 zip code, from the old town grid out to the county roads where Medina County clay does what it does. The soil here doesn’t sit still. We plan for that before the first measurement gets written down.
Why TruePane Windows & Doors Is La Coste’s Preferred Window Installation Company
Dale Kessler founded TruePane in 2008 on a rule that still hangs in the shop: if the pane is not true, the job is not done. That wasn’t marketing talk then and it isn’t now. We built our Window Installation process around measuring every opening twice, quoting manufacturer lines side by side on paper, and registering both warranty layers before our truck leaves your driveway. La Coste homeowners keep calling us back because we do the unglamorous work first: checking the rough opening for rack, squaring the frame, and taping the flashing so wind-driven rain stays outside where it belongs.
Homeowners in La Coste who have lived in the same house for twenty or thirty years tell us the same thing: they are tired of contractors who show up late, hide change orders, and vanish when a seal fails. We run background-checked, uniformed technicians who work in your home the way they would work in their own mother’s. And a live person answers our phone 24 hours a day, 7 days a week. Not a voicemail tree. Not a callback form. You call, someone from our team picks up.
Key Takeaways:
- TruePane is led by Dale Kessler, a second-generation glazier with years of community service behind the craft.
- Every job carries the Done Right Promise on top of both manufacturer warranty layers stated in writing.
- We measure every opening twice and register the warranties before the truck leaves the driveway.
- A live person answers the phone 24/7 at (888) 635-0804.
Our Window Installation Services in La Coste
Most of the houses we work on in La Coste were built between the 1960s and 1980s, when single-pane aluminum was the standard. That means the work here is rarely a simple swap. We reframe, shim, square, and seal. Then we install the window the house should have had from the start. Here is how the main styles play out in La Coste homes.
Double & Single Hung Windows
Double hung windows are the workhorse replacement for older La Coste ranch homes. They fit the existing vertical openings left by original single-pane sashes, so the exterior brick or siding usually doesn’t need major surgery. We install fusion-welded frames with low-E glass and argon fill, which matters here because an old aluminum frame acts like a radiator in summer. A single hung runs $520-$1,100 in La Coste; a double hung runs $640-$1,450 installed.

Sliding Windows
Sliders are common in La Coste homes where the original builder put wide horizontal openings across a back wall or carport-facing room. The trouble is those old aluminum tracks fill with dust from the open ranchland wind, and once the rollers bind, the sash stops sealing. We replace the entire unit rather than fighting worn tracks. Expect $550-$1,300 for a slider depending on width and glass package. Clay movement is a factor here too. A slightly settled rough opening will make a new slider bind within a year if we don’t square the frame first.

Casement Windows
Casement windows give La Coste homeowners the best air seal of any operable style, which matters when south Texas heat sits on your walls from noon to sunset. The crank mechanism closes the sash tight against the weatherstripping. That seal is what keeps a 100°F afternoon from leaking through the gaps. Casements run $680-$1,550 in La Coste. We see more of these going into kitchens and over sink runs where reaching up to lift a double hung isn’t practical.

Awning Windows
Awning windows hinge at the top and open outward, so they shed rain while still allowing airflow. That’s a real advantage in La Coste, where a summer storm can blow through fast and hard. They’re also a good fit for bathrooms and short wall sections where a full-height window isn’t needed. Plan on $500-$1,000 installed for a standard awning unit.

What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in La Coste
We are an authorized installer for more than a dozen manufacturer lines, including, PGT, CGI, and ES Windows. For La Coste’s heat and wind conditions, we often quote CGI and PGT impact-rated lines for solid protection against UV and wind-driven debris, and ES Windows or ECO Window Systems for energy efficiency on full sun exposures. We quote the lines side by side on paper so you see the actual cost difference and warranty terms before you sign anything. No mystery brands, no “trust us” pricing.
Common Window Installation Problems We See in La Coste Homes
- Racked rough openings from Medina County clay. The same Vertisol soil that cracks driveways and shifts door frames also pushes window openings out of square. A frame that was true in May may be a quarter-inch off by August. We check for rack before the new unit goes in.
- Dead seals in original aluminum frames. Single-pane aluminum windows with failed thermal seals turn your living room into a greenhouse. Summer heat pushes indoor temperatures past 90°F and the cooling bill climbs every year. The fix is a full-frame replacement, not a glass swap.
- Failed flashing tape behind the siding. We have pulled original windows off 1970s homes and found the flashing tape dried out, cracked, and letting dust and moisture into the wall cavity. New flashing is part of every full-frame install we do.
- Undersized headers from previous remodels. If a previous owner cut a window opening wider without upgrading the header, the new window will sag and bind. A permit-triggered inspection catches this before we anchor the frame, and we price the fix in writing before anyone starts cutting.
Pricing for Window Installation in La Coste, TX
Here is the honest picture for La Coste’s market. A straightforward insert replacement where the existing frame is square and the opening is tight runs $480-$850 per window. The same window as a full-frame replacement with new flashing, shims, and interior trim runs $850-$1,850. The difference is the amount of structural correction behind the drywall. When clay movement has racked the opening, count on the upper half of that range. A complete ranch-house window package in La Coste typically lands between $6,000 and $14,000, depending on window count and how much framing correction the job requires. Every quote is written, itemized, and free. Call (888) 635-0804 and we’ll send someone out to measure.
We Also Serve Cities Near La Coste
TruePane handles La Coste and the surrounding communities along the US-90 corridor. If you’re in Atascosa, Lytle, Macdona, or Von Ormy, the same crew that works La Coste homes can get to you with the same equipment and the same written pricing. Dispatch and scheduling run through our San Antonio office; crews live and work right here along the corridor.
Serving La Coste, TX - Our Local Coverage Area
We’re based in the La Coste 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 La Coste
La Coste sits on expansive Vertisol clay that swells with spring rain and shrinks during summer drought. That seasonal movement can shift a window’s rough opening by a quarter-inch or more between seasons. When the framing moves, the window fights it and the sash binds, the seal breaks, or gaps open around the flange. We check every opening for rack and out-of-square before ordering or installing anything. Call (888) 635-0804 and we’ll tell you what your specific house is dealing with.
We stop and explain it before we touch anything. If the opening is racked beyond what shims can correct, we reframe and square the rough opening before installing the new unit. That work gets priced in writing and approved by you before we proceed. No surprises on the final bill, and no window forced into a crooked hole that will fail inside eighteen months.
Yes, full-frame window replacement that changes the structural opening typically requires a city permit and an inspection. In La Coste, that means the inspector may find undersized headers, spliced studs, or other framing issues from a previous remodel. We pull the permit, schedule the inspection, and price the correction in writing before work continues. You will never get a change order sprung on you after the drywall is off.
You can, but in most La Coste homes built in the 1960s through 1980s, you are putting new glass into a frame that is already losing the battle. The aluminum is pitted, the thermal break is shot, and the frame itself is out of square from clay movement. A glass-only swap saves money up front but leaves you with the same air leaks, the same dust infiltration, and the same binding sash. We’ll show you the numbers for both options and let you decide. Call (888) 635-0804 for a free estimate.
A seal failure traps moisture between the glass panes permanently. If the fog is between the panes and doesn’t wipe off from either side, the seal is dead and the insulating gas is gone. That means the window’s efficiency is gone too. If the condensation wipes off the interior surface, it’s household humidity and the window seal is probably fine. We can confirm with a quick inspection and tell you whether you need a replacement or just better ventilation. Estimates are free.
What a La Coste Window Replacement Actually Costs When the Clay Has Moved
Here is the part most window companies won’t tell you until they’re already in your wall. La Coste is not a generic suburb. The clay under this town moves, and when it does, your window openings move with it. A company that measures the glass size without checking the frame for rack will install a new window into a crooked hole and call it done. The window will bind, the seal will fail, and in two years you’ll be calling someone else to do the job again.
We do it differently. On a 1970s ranch off North Front Street, our crew pulled the original single-pane aluminum sliders and found the jamb on the west wall had twisted a full half-inch out of square from clay swell. Failed flashing tape had let dust and moisture wedge behind the siding. We reframed and shimmed that opening to true, installed a fusion-welded double-hung with low-E glass and argon fill, and re-taped the perimeter before the drywall went back. The homeowner said the living room stopped breathing hot air for the first time in twenty years. That is the job, not the window.
A window replacement in La Coste costs what it costs because of what is behind the wall, not because of the glass. We price the worst case before we start, and if the opening turns out true and clean, your bill comes in lower than the estimate. If it’s racked, we already have the number in writing and the permit in hand. Either way, you’re not guessing. Call (888) 635-0804 and we’ll measure the real openings, check the frames, and give you a written quote that covers what we’ll actually find.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving La Coste and the US-90 corridor with straight measurements, square frames, and warranties in writing.



Before
After
Before
After
Before
After