New windows and doors improve comfort, cut energy bills and add long-term value to your home. Westlight Windows Dallas pairs proven product lines with our own installing crews for lasting performance - and a price we put in writing.
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.
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.
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 Door Installation: The Dallas Owner’s Guide
Therma-Tru door installation in Dallas typically runs $1,850 to $4,600 installed, depending on whether we’re replacing the door slab only or the full frame-and-threshold system. Most Therma-Tru door installations we handle are completed in a single day, and we stock the common weatherstripping, thresholds, hinges, and sweep components on our trucks. The most common way Dallas homeowners discover a problem is a door that suddenly sticks at the top corner in summer, or drafts that show up at the bottom edge when the first cold front pushes through in November.
If you’re reading this, odds are you already know the door itself is solid. Therma-Tru makes a good fiberglass door. What fails is what surrounds it: the weather seal, the threshold, the hinges, the frame. Half the doors we look at in Dallas don’t need a full replacement at all. They need the right Therma-Tru-compatible part swapped in by someone who knows which one fits your specific model. That’s the page you’re on.
Key takeaways:
- Most Therma-Tru door repairs in Dallas are one-day jobs with parts we stock locally.
- You get a written price before any work starts, per the Kingswell Guarantee.
- If the repair fails within a year, we come back and fix it at no charge.
Which Therma-Tru Models This Applies To
Therma-Tru has built its entry-door line across several series: Classic-Craft, Fiber-Classic, Smooth-Star, Pulse, and the newer Benchmark line for budget-conscious replacements. Door installation parts aren’t universal across these. A Fiber-Classic uses a different hinge plate and seal profile than a Classic-Craft, and the Pulse line uses an integrated leveling system that doesn’t cross over at all.
Here’s the compatibility gotcha most Dallas homeowners run into: Therma-Tru doors made before 2012 used a one-piece vinyl sweep on the bottom rail. Newer models use a bulb-style seal that slides into a kerf channel milled into the door. They look close enough to confuse you at a parts counter, but they don’t interchange. We check the manufacturer’s label on the hinge edge of the door, which lists the model, series, and production date. That label saves us from ordering a part that’s off by an eighth of an inch.
OEM Therma-Tru parts are our default for anything structural: hinges, corner pads, and frame components. For wear items like door sweeps and weatherstripping, we’ll sometimes recommend aftermarket equivalents that match or beat the original material spec, especially if a door is 15 years old and parts for its generation are no longer in production. We’re an independent service provider, not affiliated with Therma-Tru, which means we carry parts from several sources and can tell you honestly when the OEM version isn’t worth the markup.
Signs Your Therma-Tru Door Installation Is Failing
- Daylight visible under the door at the threshold. The sweep has compressed or torn. In Dallas, rubber and vinyl compounds degrade faster than manufacturers’ average lifespans suggest. Constant heat and UV exposure break down the polymer in about five to seven years here even if the door itself has decades left.
- The door binds at the top hinge-side corner in the afternoon. This is a classic Dallas summer symptom. The west-facing side of the house heats up all day, the frame expands, and a door that was fine at 8 a.m. won’t latch at 4 p.m. Sometimes it’s an alignment fix. Sometimes the frame was installed too tight to begin with and needs a corner pad reset.
- Cold air leaks around the perimeter in winter but only on one side. The weatherstripping has taken a set in one place. That compression memory happens when a door is left slightly ajar or the deadbolt pins it hard against the strike side for years. A universal weatherstrip kit won’t fix it; you need the profile matched to the Therma-Tru series.
- The latch no longer catches without lifting the handle. Hinge wear, not latch wear, is usually the cause. Therma-Tru doors are heavy; a fiberglass slab with a foam core still weighs 80 to 120 pounds. Over years, even good hinges develop slop, and the door sags a quarter inch. New hinges of the right gauge fix more latching problems than new locksets do.
- Water marks or softness on the interior floor near the threshold. The sill pan or threshold seal has failed. Dallas gets about 38 inches of rain a year, and most of it arrives in fast, hard storms. A threshold that channels water under the door instead of away from it will rot the subfloor before you see damage from inside. This is the one to call about quickly, because the fix gets more expensive the longer it waits.
Replacement Cost & What’s Included
Here’s what Therma-Tru door installation work actually costs in Dallas right now:
| Scope of Work | Typical Range |
|---|---|
| Door sweep replacement (parts + labor) | $95 – $210 |
| Weatherstripping replacement, full perimeter | $160 – $320 |
| Threshold replacement with proper sealing | $240 – $480 |
| Hinge replacement and door realignment | $180 – $390 |
| Frame corner pad repair or reset | $280 – $550 |
| Full door slab replacement, standard size | $1,850 – $3,400 |
| Complete door + frame + threshold system | $2,800 – $4,600 |
These are installed prices, not parts-only. Every quote includes the component matched to your specific Therma-Tru series, removal and cleanup, and a written guarantee on labor and materials. What drives the range is whether your rough opening is standard or needs any framing adjustment, and whether the frame itself is sound enough to reuse. Older houses in Lake Highlands and near White Rock Lake often have settled frames that eat up an extra hour or two of shimming work. You will always see the full written price before we touch a screw, and that number will not change at the door. If we find something unexpected, we stop and show you before we proceed. That’s the Kingswell Way.
Every Therma-Tru installation we do carries our 365-Day Done Right Promise. If the work isn’t right within a year, we return and correct it at no charge. No debate, no invoice.
DIY or Call Us?
Door sweeps and some weatherstripping on Therma-Tru doors are within reach for a careful homeowner. The corner pads on the frame, hinge re-mortising, and threshold replacement are not. Getting a threshold wrong means water in your subfloor. Getting a frame wrong means a door that never closes right again. The tension and clearances on a pre-hung fiberglass door are measured in sixteenths of an inch. Owen Satterfield has spent more than two decades installing these doors, and his rule is the same one we follow on every job: if a fix doesn’t look factory-correct when it’s done, it isn’t done. If I wouldn’t put it on my own house, I’m not putting it on yours.
Here’s a fair split: if the problem is a torn sweep and you’re handy, a matched replacement is a one-beer Saturday job. If the problem is the door sticking, the latch not catching, water showing up anywhere, or anything involving the frame, call us. You’ll get a real person on the phone 24/7, and a technician who shows up in the window we gave you, in a uniform, with a name tag. Call (361) 441-0865 to get your free estimate scheduled.
FAQs
The door slab itself is rated by Therma-Tru for a service life of 20 to 30 years, but the wear parts around it (sweeps, weatherstripping, thresholds) realistically last five to ten years in Dallas before heat and UV break down the polymers. The door usually outlasts everything around it by two decades. Call (361) 441-0865 and we’ll tell you if your issue is the door or just the parts around it.
Yes, in most cases. Roughly two-thirds of the Therm-Tru doors we inspect in Dallas are fixed with a part swap rather than a full replacement. Door slabs crack only under extreme conditions; hinges, seals, thresholds, and frame corners fail routinely. We’ll tell you honestly if a repair will hold or if a replacement is cheaper long-term. Call (361) 441-0865 for a straight answer and a free estimate.
Door sweeps, weatherstripping, and hinge swaps are typically done in an hour to two hours. A full frame reset can take a half day. Complete door and frame replacements usually finish in one day. We’ll give you a committed arrival window and a realistic time frame with your written quote before work starts. Call (361) 441-0865 to schedule.
We stock the common wear items on our trucks: door sweeps, weatherstripping profiles, thresholds, and hinge sets for the major Therma-Tru series (Classic-Craft, Fiber-Classic, Smooth-Star, Benchmark). Odd-size or model-specific frame components may take a few days to source. We’ll tell you at the estimate which category your job falls into. Call (361) 441-0865 and we’ll check exact availability for your Therma-Tru model.
Written by Owen Satterfield, Owner, Westlight Windows Dallas at Westlight Windows Dallas, serving Dallas and nearby areas.
Six Reasons Homeowners Choose Westlight Windows Dallas
Laminated glass and reinforced frames hold up to wind-driven rain, hail and flying debris, so your openings stay sealed when the weather turns.
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.
Tighter seals and insulated glass even out hot and cold rooms and stop the drafts at the frame.
A full impact package upgrades curb appeal, buyer confidence and appraised value in one project.