New windows and doors improve comfort, cut energy bills and add long-term value to your home. Westlight Windows Austin pairs proven product lines with our own installing crews for lasting performance - and a price we put in writing.
1. Choose your installer
The unit is half the job - the install is the other half. Our own background-checked crews measure, set, seal and insulate every opening, and they know the lines we quote inside and out because they install them every week.
2. Select the right products
Compare styles, materials and glass packages side by side until the fit is right for your rooms, your budget and your goals. The product-line comparison below is the place to start.
3. Prepare your home for install
Before install day we walk you through a short checklist - furniture pulled back, treatments down, a clear path to each opening - so install day is watch-it-happen, not scramble.
Compare the Lines We Quote
Every project is priced on the same lines, side by side - the price indicators below are relative, and your consultant shows exact numbers on your actual openings.
PGTThe line Florida homeowners arrive naming - the most Miami-Dade certifications in the industry$$$
- More Miami-Dade NOA certifications than any other line we quote
- WinGuard, EnergyVue and ClassicVue Max systems built for every wind zone
- 99% on-time delivery keeps your install date on the calendar
CGIThe heavyweight impact line$$$$$
- Large-missile impact ratings for the strictest wind zones
- Architectural-grade aluminum with commercial-depth frames
- The line we quote when protection is the whole point
CWSThe Florida value pick$$
- Vinyl systems built in Florida for Florida codes
- Strong energy packages at the friendliest price point
- The smart start for whole-home replacements on a budget
ESWSlim lines, big glass$$$$
- Narrow-sightline aluminum for modern elevations
- Oversized openings and floor-to-ceiling glass
- Impact-rated without the bunker look
ECOThe aluminum impact workhorse$$$
- Miami-built aluminum impact systems
- A strong price-to-protection ratio for coastal homes
- Proven inventory lines with short lead times
Therma-Tru Window Installation: The Austin Owner’s Guide
Therma-Tru window installation in Austin typically runs $450 to $1,100 per window installed, depending on frame size, glass package, and existing opening condition. We stock Therma-Tru-compatible window units and hardware on our trucks, so most replacements are done in a single visit. Most Austin homeowners discover a Therma-Tru window has failed when condensation fogs between the panes, the sash won’t stay up, or a draft kicks in during a Hill Country cold front.
We’re Westlight Windows Austin, an independently owned and operated Kingswell location. We’re not affiliated with Therma-Tru, but we’ve installed and serviced their windows across Austin for years, from Travis Heights bungalows to newer builds pushing up against the Greenbelt. Owen Satterfield grew up learning this trade through the building construction program at Los Angeles Trade-Technical College, and that training shows in how we handle Therma-Tru window work: we measure twice before ordering, we bring the right part the first time, and we write down the price before anything gets touched.
Measure it right the first time and the rest of the job takes care of itself.
Which Therma-Tru Models This Applies To
Therma-Tru’s window line includes single-hung, double-hung, sliding, casement, and picture windows, along with companion units built to match their entry door systems. The compatibility gotcha most homeowners hit is that Therma-Tru windows made before 2015 use a different balance shoe profile than current production, and the two are not interchangeable. If your window has a silver label on the top of the sash, that’s the older series. A white label means it’s the newer one. We check that label on every Austin job before we order parts, because putting a new balance into an old shoe is a callback waiting to happen.
OEM Therma-Tru parts are available for most current models and some discontinued ones. For older series where the factory part is no longer made, we use quality aftermarket equivalents from manufacturers we’ve tested over hundreds of Austin installations. The aftermarket balances we use carry the same load ratings as OEM, and in a few cases outlast the originals because the polymer blend was spec’d for hotter climates. Austin’s sun and humidity are harder on window hardware than most manufacturers design for. Our eight stocked manufacturer lines, including PGT, CGI, CWS, and Therma-Tru, mean we never force one brand’s part where another fits better.
Signs Your Therma-Tru Window Installation Is Failing
A failing Therma-Tru window rarely announces itself all at once. Most of the time, the signs show up weeks before the window actually stops working. Here’s what we see on service calls across Austin:
- Condensation trapped between the glass panes. The glass unit seal has failed, and that moisture isn’t cleanable from either side. In Austin’s humidity swings, a failed seal also lets argon or krypton gas escape, which kills the window’s energy performance.
- The sash strains to lift or slides shut on its own. The balance system has lost tension or a balance shoe has cracked. On Therma-Tru double-hungs, this is the most common failure point we see in Austin homes older than about twelve years.
- Draft around the window frame during temperature swings. Weatherstripping has compressed or cracked, or the frame has shifted and opened a gap. Austin’s clay soil moves houses by fractions of an inch every season, and older window frames take that movement in ways newer ones are designed to handle.
- Hardware feels loose or the window rattles when you close a door. Cam locks and keepers wear over time, especially on windows that get daily use facing west. West-facing windows in Austin get roasted by the late-afternoon sun, and thermal expansion accelerates hardware wear. That late western sun is actually where the Westlight name comes from: it’s the light that pours through a good window, bright, warm, and worth doing right.
- Visible frame rot or separation at the corners. Water has been getting in, usually from failed exterior caulk or a missing weep cover. We recommend an immediate fix because the rot spreads into the rough opening and the repair cost climbs.
Replacement Cost & What’s Included
Here’s what Therma-Tru window installation actually costs in the Austin market, based on our recent jobs. These are total installed prices, not parts-only numbers:
| Window Type | Typical Installed Price Range (Austin) | Parts Included |
|---|---|---|
| Glass unit replacement (insulated, standard low-e) | $450 – $700 | New sealed glass unit, glazing bead, installation |
| Sash replacement (double-hung, single sash) | $550 – $850 | New sash, balance match, weatherstripping, installation |
| Full window replacement (standard-size double-hung) | $700 – $1,100 | Complete window, new balances, flashing, trim-out, installation |
| Hardware-only repair (locks, keepers, cranks) | $120 – $300 | Replacement hardware, adjustment, testing |
What drives the range? Window size, glass type, whether the frame needs work, and accessibility. A second-story window in a Travis Heights bungalow with a steep roofline costs more to access than a first-floor slider in a newer build. Every quote comes as a written, line-item price before any work starts. We don’t revise quotes at the door, and we don’t add change orders unless you approve something additional first. Every job includes a written Kingswell Guarantee that covers the work, the cleanup, and a free return visit if the repair fails within the guarantee period. That’s the 365-Day Done Right Promise, and it’s in writing on every single job.
DIY or Call Us?
Some things are worth checking yourself: a loose lock screw, debris in the track, a weep hole that’s clogged with dirt. Those are five-minute fixes with a screwdriver or a wire. But glass unit replacement, balance replacement, and sash removal on a Therma-Tru window are not DIY territory. The replacement glass units are heavy, the balances are under tension, and removing a sash incorrectly damages the guide track, which turns a $250 hardware job into a $900 replacement. We’ve fixed enough overzealous weekend projects across Austin to say this plainly: the money you save doing this yourself usually shows up later as a higher repair bill.
If you can see condensation between the panes, a sagging sash, or daylight through the frame, call us. We’ll send a background-checked, uniformed technician to diagnose it, give you a written price before any work starts, and answer any question you have. Call (254) 322-3468.
FAQs
A well-installed Therma-Tru window in Austin typically lasts 20 to 25 years before the glass seal fails or the balances wear out, though west-facing windows exposed to full Texas sun and clay-soil shifting can show failures in 10 to 15 years. The installation quality is the biggest variable. A window jammed into an out-of-square opening fails years before one shimmed and flashed correctly. To get an honest assessment of your windows, call (254) 322-3468.
Yes, in most cases a Therma-Tru window can be repaired with a new glass unit, replacement balance, or new hardware, and a repair runs about half to two-thirds the cost of a full replacement. The decision depends on frame condition and window age. If the frame is solid, a glass unit or hardware swap is the right call. If the frame has rot or the window is past 20 years old, replacement is the better long-term choice. Call (254) 322-3468 and we’ll tell you straight which one applies to your window.
A single glass unit replacement takes about an hour, a sash or hardware replacement around 90 minutes, and a full window replacement two to three hours depending on framing conditions. We don’t rush the measuring or the shimming, and most jobs are done in a single visit. If you have multiple windows, we’ll give you a clear time estimate with your written quote.
We stock common Therma-Tru glass units, balances, and hardware in standard sizes on our trucks, and we order specialty or odd-size parts with delivery to Austin in three to five business days. The compatibility check on the sash label tells us before we arrive which balance profile and glass spec we need. Because we stock eight manufacturer lines, we often have exactly the right part on hand, not just something close enough. Call (254) 322-3468 and tell us what you’re seeing; we’ll tell you over the phone whether the part is likely on the truck or needs to be ordered.
If your Therma-Tru window is failing, don’t wait for the draft to get worse or the glass to start sagging. Call Westlight Windows Austin at (254) 322-3468 for a free estimate. We’ll come out, tell you what’s wrong, and put a written price in your hand before any work starts. That’s the Kingswell Way: the price before the work, the arrival window we keep, the jobsite left cleaner than we found it, and the guarantee in writing.
Written by Owen Satterfield, Owner, Westlight Windows Austin at Westlight Windows Austin, serving Austin and nearby areas.
Six Reasons Homeowners Choose Westlight Windows Austin
Impact systems engineered to design pressures up to +/-100, matched to your wind zone - your openings hold when the storm arrives.
Low-E insulated impact glass from our manufacturer lines commonly cuts monthly cooling bills 20-30%.
Laminated impact glass shuts out up to 40% of outside noise - traffic, neighbors, weather.
Monitoring services run $30-90 a month. Laminated impact glass resists forced entry around the clock, with no subscription.
Florida homeowners average around 25% savings on the windstorm portion of their policy after protecting every opening - some homes qualify for more.
A full impact package upgrades curb appeal, buyer confidence and appraised value in one project.