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 La Coste
Impact windows and doors in La Coste protect against more than hurricane season. The real fight here is with Medina County clay and south Texas sun. A properly installed impact-rated window or door in La Coste runs $900-$2,800 per opening depending on size, frame material, and whether the surrounding wall framing needs reinforcement first. TruePane sends background-checked, uniformed crews to La Coste from our San Antonio office, and we measure every opening twice before we quote. Call (888) 635-0804 for a free estimate.
We know La Coste’s older ranch homes because we’ve worked on them for years. This town was built on agricultural roots, and most of the original houses date to the 1960s through 1980s. Those homes were framed and flashed for a different era, and they show it when you open a wall. We plan for that before we ever set a window.
Why TruePane Windows & Doors Is La Coste’s Preferred Impact Windows & Doors Company
Dale Kessler founded TruePane in 2008, but the craft goes back many years. Dale is a second-generation glazier, and the rule on his whiteboard has not changed since day one: if the pane is not true, the job is not done. That standard applies to every impact window and door we install in La Coste, from a single replacement slider off US-90 to a full retrofit on a 1970s ranch near Castroville Road.
La Coste homeowners call us because they want a company that answers the phone and stands behind the work. A live person answers 24 hours a day, seven days a week. Not a voicemail tree, not a callback form. When someone in the 78039 zip code calls about a door that will not latch, they talk to a person who knows what Medina County clay does to a frame in August.
Every La Coste job carries the Done Right Promise and The Keystone Standard. Both manufacturer warranty layers go on paper, in writing, with durations stated, before the truck leaves the driveway. If something is not right, we make it right. No paperwork fights, no fine print that covers neither.
Our Impact Windows & Doors Services in La Coste
Hurricane Impact Windows
Most La Coste homes still have original single-pane aluminum sliders. They leak energy, let dust sift through on every south wind, and offer almost nothing against wind-driven debris. We replace them with impact-rated windows from manufacturers like PGT and CGI, and we re-square the opening before we set the frame. On La Coste’s expansive clays, that re-squaring step is not optional. Skip it, and the new window binds within a season or two.

Impact Entry & French Doors
Impact entry doors and French doors in La Coste take a beating from several directions at once. The sun bakes the west-facing exposures, the wind loads the south exposures, and the clay flexes the framing from below. We install impact-rated doors with reinforced jambs and proper flashing tape, and we check the striker plate alignment as part of the install. On La Coste soil, a door that closes perfectly in May may stick by August. We set them so they can be adjusted seasonally without pulling the whole unit.

Impact Sliding Glass Doors
Sliding glass doors are common in the 1970s and 1980s La Coste houses, and most of the originals have failed weatherstripping and worn rollers. An impact-rated sliding glass door replacement in La Coste typically runs $2,200-$4,800 installed, depending on width and whether the track needs to be rebuilt. We stock common parts for local jobs, which shortens turnaround for La Coste customers.

Impact Garage Doors
Garage doors are the largest opening in most La Coste homes, and an old hollow-core door is the first thing to fail under wind pressure. Impact-rated garage doors for La Coste homes run $2,800-$6,500 depending on size and insulation. We brace the opening to current wind code and install the door so it operates cleanly through the seasonal frame movement this soil produces.

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 La Coste
TruePane is an authorized installer for more than a dozen manufacturer lines, including PGT and CGI, two names we recommend often for La Coste because their impact ratings hold up well under south Texas UV exposure. We also work with ES Windows and ECO Window Systems for homeowners who want a specific frame profile or glass package. We quote manufacturer lines side by side on paper so you see exactly what you are buying, and we register both warranty layers before the truck leaves your driveway.
Common Impact Windows & Doors Problems We See in La Coste Homes
- Seasonal clay shrink-swell torques impact window frames. Medina County Vertisol clay swells with spring rain and shrinks in summer drought. That movement throws door and window frames out of square, binding sashes and cracking seals even on newer installs. We see it on nearly every repeat call in La Coste.
- Undersized 1960s wall framing flexes under south wind loads. Many original La Coste homes were framed with lumber sections that do not meet current wind code. When an impact window is set into a flexing opening, the glazing can crack at the corners. We reinforce openings to code before setting the frame.
- Failed waterproofing behind aging aluminum sliders. Old flashing tape dries out, cracks, and lets driving rain follow the tape into the wall cavity. By the time we remove the slider, the jamb is often rotted and the sheathing is soft. This is the most common surprise in La Coste tear-outs.
- Dust infiltration through compromised frame joints. Open ranchland around La Coste funnels strong south winds with little obstruction. Any gap in a frame joint becomes a dust entry point. Homeowners notice it on windowsills and door thresholds after dry spells.
Pricing for Impact Windows & Doors in La Coste, TX
Impact window replacement in La Coste runs $900-$2,800 per opening. Impact entry doors run $2,500-$5,500. Impact sliding glass doors run $2,200-$4,800. Impact garage doors run $2,800-$6,500. These ranges reflect what we actually see in La Coste, not a statewide average.
What moves the number is the condition of the opening. If the framing is square and the flashing is intact, the job is straightforward. If the clay has twisted the rough opening or thirty years of leaks have rotted the jamb, the repair work adds to the total. We write that into the quote before we start. No mystery line items at the end of the job.
Call (888) 635-0804 for a free estimate. We measure every opening twice, quote manufacturer lines side by side on paper, and give you a written price before any work begins.
We Also Serve Cities Near La Coste
TruePane handles Impact Windows & Doors work throughout the US-90 corridor and western Medina County. Beyond La Coste, our crews regularly serve Atascosa, Lytle, Macdona, and Von Ormy. If you are in any of those areas, call (888) 635-0804 and a live person will answer.
Impact Windows & Doors in La Coste: How We Handle Remodels That Open Walls
Opening up an older La Coste home always turns something up. The original wiring in a 1968 ranch is not to current code. The framing around a 1976 slider may be undersized or water-damaged. The waterproofing behind the old aluminum windows has usually failed. A remodel that triggers a permit also triggers code upgrades once the walls are open, and that is the single biggest reason a window or door quote moves during the job. We handle it the way a careful contractor should: inspection first, allowances written into the contract, and any surprise priced and approved in writing before we touch it.
On a 1970s ranch near the old La Coste school, we replaced original single-pane aluminum sliders with Andersen impact-rated casement windows and an impact French door. The crew had to re-square both the rough opening and the jamb first, because the summer drought had pulled the left side of the door frame a full 3/8 inch out of plumb. We installed new flashing tape and fusion-welded frames, and the owner reported the dust stopped sifting through on every south wind. That is what done right looks like in La Coste.
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 - Impact Windows & Doors in La Coste
Because the Medina County clay under your foundation swells with spring rains and shrinks in the summer drought. Your door frame is moving with it. The fix is to have the hinges adjusted or the striker plate repositioned seasonally. Call (888) 635-0804 and we’ll send a technician to La Coste to re-align the frame and get the door latching clean again. Estimates are free.
A permit on an opened wall in La Coste generally requires bringing exposed framing up to current wind-load standards, updating any accessible electrical to current code, and installing proper flashing and waterproofing at all openings. We include these in the written quote before work starts, so the code upgrades are not a surprise add-on. Call (888) 635-0804 for an exact scope on your house.
We stop work and show you what we found. Then we write the repair scope and price in writing, and you approve it before we touch it. Rotted jambs are common in La Coste because the original flashing tape fails and driving rain follows it into the wall cavity. We cut out the rot, sister in new lumber, flash it properly, and then set the new unit. Call (888) 635-0804 to schedule an inspection.
Impact glazing handles wind and debris, but it does not handle the La Coste sun. Without low-E glass and argon fill, a west-facing impact window becomes a heat radiator by mid-afternoon. We recommend low-E with argon for any La Coste opening that gets direct afternoon sun, which is most of them. Call (888) 635-0804 and we’ll quote both options side by side on paper.
Fog between panes means the seal has failed. In La Coste, the usual cause is frame movement from the clay soil working on the sash until the edge seal lets go. The glass unit needs to be replaced, and if the frame is out of square, that needs to be corrected too or the new seal will fail the same way. Call (888) 635-0804 for a free estimate on seal repair or replacement.
Call TruePane for Impact Windows & Doors in La Coste
La Coste is not a generic market. The clay moves, the wind blows, and the sun is relentless. We build every quote around those facts. Dale Kessler’s rule still governs every job we do: if the pane is not true, the job is not done. Call (888) 635-0804 to schedule your free estimate. A live person answers, day or night.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving La Coste and surrounding communities.



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