New windows and doors improve comfort, cut energy bills and add long-term value to your home. Meridian Windows and Doors Houston 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 Patio Door Installation in Houston: What to Know First
Therma-Tru patio door installation in Houston typically runs $1,200 to $3,800 installed, depending on whether you’re replacing a slab, swapping an existing unit, or putting in a new rough opening. Most jobs take one full day, and we recommend scheduling about a week out during spring and fall when demand ticks up. We’re an independent Therma-Tru service provider with this core promise: the price goes on paper before any work starts, and it does not move.
If you own a Therma-Tru sliding patio door or hinged French door in Houston, this page covers how these products fail in our climate, what a proper install involves, and what you should budget. When you’re ready for a firm number, call (432) 278-2282 and we’ll walk through your project.
How Therma-Tru Products Fail – and How We Fix Them
Therma-Tru builds a solid door, but Houston humidity, clay soil movement, and hard sun expose weaknesses in any patio door. Here’s what we actually see on service calls, by series where it matters:
- Smooth-Star sliding doors: roller wear and track deflection. The original rollers on Smooth-Star sliders are nylon and hold up reasonably, but once the track gets even slightly out of level from foundation movement, the weight rides on one roller and chews it down. Symptom: the door slides fine for six feet, then drags hard in the last foot. We check track level with a laser before replacing anything, because new rollers on a bowed track fail within months.
- Classic-Craft hinged patio doors: threshold rot from wicking. The Classic-Craft line uses a composite frame, but the threshold cap on older units has a seam where water can wick in at the strike side. We see this in Houston homes where afternoon storms drive rain against west-facing doors. The fix is pulling the threshold cap, inspecting the substrate, and sealing with a polyurethane sealant before resetting. If you only caulk the exterior seam, the rot continues underneath.
- Fiber-Classic and Smooth-Star weatherstripping compression set. After five or six Houston summers, the original weatherstripping loses its rebound. The door still operates, but you’ll feel hot air bleeding in at the header and strike side. We replace with closed-cell foam weatherstripping rather than the OEM felt-and-fin product, which gives a better seal against Houston humidity for about the same material cost.
- Sliding door interlock separation. On Therma-Tru sliders with a center interlock, the interlock can separate slightly when the house settles. Symptom: visible daylight at the center meeting rail, even with the door locked. This is not a door failure, it’s a framing issue, and the correct fix is shimming the head and threshold to restore alignment, then adjusting the interlock catches. Bending the interlock back with pliers is a temp fix that fails again in weeks.
- Improved casing and brickmould deterioration on sun-exposed elevations. Therma-Tru’s exterior trim components are composite, not vinyl, but on Houston homes where a south-facing patio door gets full afternoon sun, we still see occasional checking and fade after a decade. If the structural frame is sound, we replace the casing components individually rather than the whole unit, which keeps the job under $500 in most cases.
Our Therma-Tru Patio Door Installation Process
Every Therma-Tru job follows the same sequence, whether it’s a single sliding door in Katy or a full replacement in the Heights:
- 1
Site inspection and measurements. We measure the rough opening in three places: header, mid-height, and threshold. Houston homes settle, and a 1/4-inch difference between top and bottom changes how we shim the frame. We also check for flatness on the header and the condition of the subfloor under the threshold.
- 2
Written estimate. Elliot Vance reviews every estimate personally before it goes out. The price includes the door, labor, haul-away, and any threshold or trim work. It includes all materials, so the price does not shift mid-job. No allowances for “unforeseen conditions” buried in the fine print.
- 3
Product and parts decision. We spec OEM Therma-Tru parts where they matter: hinges, locking hardware, and threshold caps. For rollers, weatherstripping, and sealant, we use quality aftermarket materials that hold up better in Houston’s humidity than some original components do. You get a clear line item showing which parts are OEM and which aren’t, before we order.
- 4
Installation and shimming. We set the frame plumb and square, shim behind the hinges and at the lock points, and level the threshold on the existing slab. On sliders, we check track level twice before anchoring, because a 1/8-inch slope murders the roller bearings in a year.
- 5
Sealing and testing. We seal the exterior perimeter with polyurethane sealant, the threshold cap gets seated and sealed, and we cycle the door at least twenty times: full open to full closed, locked and unlocked. If it binds, drags, or doesn’t latch cleanly, we fix it before leaving. Then we lay out the 365-Day Done Right Promise in writing and both of us sign the completion form.
What Therma-Tru Patio Door Installation Costs in Houston
Here’s what Houston homeowners can realistically expect to pay for Therma-Tru patio door work in 2025 and 2026:
- Single sliding patio door replacement (existing opening): $1,400 to $2,600 installed, including haul-away and trim work
- Hinged French patio door replacement (existing opening): $1,900 to $3,800 installed
- New rough opening (cutting into masonry or re-framing): add $700 to $1,400 to the door price
- Hardware-only work (rollers, locking mechanism, threshold cap replacement): $180 to $470 including parts and labor
What moves the price: whether the existing rough opening is square (Houston foundation movement drives this up more than anything else), whether you’re keeping or replacing the threshold, and whether the door needs impact-rated glass for a wind-borne debris zone. We write the exact number on your estimate before any work starts. Call (432) 278-2282 for a free estimate and a printed price.
Why Houston Homeowners Call Meridian Windows and Doors Houston for Therma-Tru Work
A meridian is a fixed line you measure everything against. That’s what the name means and how we run every install. We’ve been operating to The Garrison Standard since 2009, and every Therma-Tru patio door job is covered in writing for a full year under our 365-Day Done Right Promise. If the install fails within that period, we come back at no charge. No labor exclusions. No fine print.
We’re also a multi-brand shop: PGT, CGI, CWS, and ES Windows sit alongside Therma-Tru in our portfolio, so if a replacement makes more sense than a repair, we can spec the right door for your Houston home rather than the one that happens to be in stock. Phones are answered by a live person around the clock, and the tech who shows up is background-checked, uniformed, and works on Therma-Tru doors every week.
FAQs
Therma-Tru’s warranty covers the door and components from manufacturing defects, but improper installation is the most common reason a warranty claim gets denied. If the frame is out of square, shimmed wrong, or sealed improperly, the manufacturer will point to the install. As an independent Therma-Tru service provider, we install to the manufacturer’s written installation instructions and we warranty the labor ourselves, in writing, for 365 days. Call (432) 278-2282 if you want a professional install that keeps your product warranty intact.
Most Therma-Tru patio doors in Houston can be repaired rather than replaced if the frame itself is sound. Roller swaps, interlock adjustments, weatherstripping replacement, and threshold cap reseals cover the majority of what we see. If the frame is rotted, the glaze is failing, or the door has been out of square for years, replacement starts making more sense. We’ll give you an honest read and a written price for either path before you commit to anything.
A standard slider or hinged door replacement in an existing opening takes one day from arrival to cleanup. New rough openings take two days, sometimes three if we’re cutting masonry and reframing. We schedule the work in writing, with a start time, and we show up when we say we will.
We keep common Therma-Tru rollers, interlock hardware, and weatherstripping profiles in our Houston shop because those are the parts that wear first. Obscure finish hardware or specific threshold caps may need to be ordered, which typically adds three to five business days. When we order parts, we’ll give you a written lead time before we take any money.
No. The price on your written estimate is the price on your invoice. The only exception is if we open up the wall and find something genuinely hidden, like rotted framing under an old threshold, and we’ll stop, show you what we found, and put the change on paper before we touch anything else. Houston homes have surprises. Surprises don’t mean surcharges you didn’t approve.
Get Your Free Therma-Tru Patio Door Estimate in Houston
If you’ve got a Therma-Tru patio door that’s dragging, leaking, or just showing its age, call (432) 278-2282. We’ll schedule a time that works for you, a uniformed tech will inspect the door and the opening, and you’ll get a written price before any work starts. Measure twice, seal it right, and the door does the rest of the talking.
Written by Elliot Vance, Owner & Lead Installer, Meridian Windows and Doors Houston at Meridian Windows and Doors Houston, serving Houston and nearby areas.
Six Reasons Homeowners Choose Meridian Windows and Doors Houston
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.