New windows and doors improve comfort, cut energy bills and add long-term value to your home. Westlight Windows Orange County 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 homeowners arrive naming - the most impact certifications in the industry$$$
- More impact certifications than any other line we quote
- WinGuard, EnergyVue and ClassicVue Max systems built for every wind zone
- 99% on-time delivery keeps your install date on the calendar
CGIThe heavyweight impact line$$$$$
- Large-missile impact ratings for the strictest wind zones
- Architectural-grade aluminum with commercial-depth frames
- The line we quote when protection is the whole point
CWSThe value pick$$
- Vinyl systems built to strict wind codes
- Strong energy packages at the friendliest price point
- The smart start for whole-home replacements on a budget
ESWSlim lines, big glass$$$$
- Narrow-sightline aluminum for modern elevations
- Oversized openings and floor-to-ceiling glass
- Impact-rated without the bunker look
ECOThe aluminum impact workhorse$$$
- Factory-built aluminum impact systems
- A strong price-to-protection ratio for coastal homes
- Proven inventory lines with short lead times
Therma-Tru Sliding & Patio Doors: The Orange County Owner's Guide
Therma-Tru sliding and patio door replacement in Orange County typically runs between $1,800 and $4,600 installed, depending on the door width, glass package, and whether we’re replacing the slab alone or the full frame. We keep common Therma-Tru rollers, handlesets, and weatherstripping on our trucks, so a simple hardware repair can often be done in a single visit. Most Orange County homeowners discover their door has failed one of two ways: it starts dragging across the track like it’s pushing through wet sand, or the latch stops catching cleanly and the door no longer feels locked even when the lever says it is.
The honest truth about sliding doors is they don’t fail all at once. The rollers wear down a fraction of an inch, the track gets grit in it from Santa Ana winds, the weatherstripping flattens out, and one morning you realize you’re using two hands and a hip to open a door that used to glide. By then, the door has been telling you for months. Owen Satterfield has measured and fit more of these than he cares to count, and the rule holds: if you’re fighting the door, the part has already failed. It just hasn’t failed completely yet.
Which Therma-Tru Models This Applies To
Therma-Tru builds sliding patio doors under several series names, including the Tru-Door line and doors sold through their Classic-Craft and Smooth-Star collections. The compatibility gotcha Orange County owners run into is this: Therma-Tru door hardware is not universally interchangeable across series. A roller assembly that fits a 2008 Smooth-Star slider will usually not seat correctly in a newer Tru-Door frame, because Therma-Tru changed the roller housing dimensions when they updated the sill design. We identify the right part by pulling the door panel, reading the manufacturing sticker on the top edge of the slab, and matching those numbers to the series. The sticker is silver, roughly 2 by 4 inches, and will list the series code and sometimes the production date.
Here is our position on OEM versus aftermarket. For rollers, we strongly prefer OEM Therma-Tru or a sealed-bearing aftermarket assembly rated for the door weight. Cheap nylon-wheel rollers from the big box stores are the single most common reason we get called back to the same door a year later. For handlesets and thumb locks, a quality aftermarket unit that matches the bore spacing will perform fine and often costs $60 to $110 less than the OEM part. We’ll show you both options with prices before anything gets ordered. Westlight Windows Orange County is an independent service provider, not affiliated with Therma-Tru, so when we recommend OEM, it’s because the fit matters, not because anyone pays us to say it.
Signs Your Therma-Tru Sliding & Patio Doors Is Failing
- The door drags or takes real effort to move. Roller bearings have worn flat or the wheels have cracked. In coastal Orange County, salt air accelerates this on aluminum-framed doors by corroding the roller axles, especially within three miles of the water.
- The door lifts up when you pull it, then drops. The rollers are no longer carrying the panel weight. This means the door is running metal-on-metal on the track, and every slide is chewing the sill. The longer this continues, the more likely the track itself needs replacement rather than just the rollers.
- The latch won't catch, or catches but wiggles loose. Therma-Tru handlesets use a spring-loaded hook latch that wears over time. When the spring softens, the latch doesn't fully seat into the strike plate. This is a security issue, not just a nuisance, because the door can be pushed open from outside even when locked.
- You can see daylight through the door edge or feel a draft at the bottom. The weatherstripping has compressed past its useful life. Orange County's UV exposure breaks down the vinyl and wool pile seals faster than the national average, which is why a door that seals fine in Ohio at 10 years starts failing here at 6 to 8.
- The screen door jumps the track or binds halfway. Screen rollers are smaller and cheaper than door rollers, and they are usually the first casualty. The screen frame itself also flexes more than people expect, which bends the roller brackets out of square.
Replacement Cost & What's Included
Here are the installed price ranges we quote across Orange County, from Huntington Beach up through Anaheim Hills:
| Service | Typical Installed Range |
|---|---|
| Roller replacement (both panels) | $180 – $340 |
| Handleset and latch replacement | $160 – $310 |
| Weatherstripping and sill seal | $140 – $260 |
| Full door slab replacement (single panel) | $1,200 – $2,400 |
| Full frame and glass replacement | $1,800 – $4,600 |
Every one of those prices is a written, line-item quote before work starts. That’s not a courtesy, it’s the Kingswell Way: say the price before the work, show up in the window we gave, leave the place cleaner than we found it, put the guarantee in writing, and come back if it fails. What drives the range is the glass. A basic clear insulated unit costs less than a low-e package or impact-rated glass, and Orange County homeowners within the coastal impact zones are sometimes required to match impact ratings on replacement panels. We’ll tell you if that applies to your door before we quote it, not after.
DIY or Call Us?
Here is an honest split. You can safely diagnose which component is failing by doing this: open the door and inspect the track for grooves, metal shavings, or flat spots on the roller wheels. You can clean the track and vacuum debris out of the sill channels. You can tighten loose handleset screws yourself. What you should not do is attempt to remove a sliding door panel from its track without a second person, because a typical Therma-Tru slider panel weighs 130 to 200 pounds, and when it tips, it doesn't ask permission. We've taken calls from homeowners who tried to save a hundred dollars and ended up with a cracked glass unit that cost eight hundred to replace.
Roller swaps are not technically hard, but getting the door to sit level and slide smoothly after the swap is where we see DIY jobs go sideways. If you want to try it, we'll sell you the right rollers. If you'd rather have it done and gone, call (424) 414-2048 and we’ll be out to look at it.
FAQs
A properly maintained Therma-Tru sliding door in Orange County typically lasts 18 to 25 years on the frame, but the roller assemblies generally need replacement every 7 to 9 years, and weatherstripping every 5 to 7. The UV and salt air here wear out soft components faster than the national average. Call (424) 414-2048 if your door is in that age range and you want us to assess what it actually needs.
Yes, in most cases. If the slab is intact and the frame is square, we replace rollers, seals, and hardware without touching the door panel itself. Replacement only makes sense when the slab has fogged glass, a bent frame, or damage that a parts swap won't fix. We’ll show you the repair price and the replacement price side by side so you can decide.
A roller or hardware replacement on a Therma-Tru sliding door takes 60 to 90 minutes from truck to done. A full slab replacement with glass generally takes half a day. We’ll give you the arrival window in writing before we schedule, and we keep it.
We stock common Therma-Tru roller assemblies, handlesets, locks, and weatherstripping on our trucks, so the most frequent repairs are same-visit jobs. Uncommon sizes or specialty finishes take 3 to 7 business days to source. We carry parts for the other lines we work with too, including PGT, CGI, and CWS, so if your door isn't a Therma-Tru, we can usually help anyway. Call (424) 414-2048 and we'll tell you what we have for your door over the phone.
Contact Westlight Windows Orange County
If your Therma-Tru sliding or patio door is fighting you, call (424) 414-2048 for a free estimate on repair or replacement. You'll get a written price before any work begins, a straight answer about whether the door needs a part or a replacement, and a crew that shows up in the window it promised. If I wouldn't put it on my own house, I'm not putting it on yours.
Written by Owen Satterfield, Owner, Westlight Windows Orange County at Westlight Windows Orange County, serving Orange County and nearby areas.
Six Reasons Homeowners Choose Westlight Windows Orange County
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.