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Get your free estimateTherma-Tru Impact Garage Doors: The San Antonio Owner’s Guide
If your Therma-Tru impact garage door has a failed panel, worn rollers, or a compromised weather seal, we stock replacement parts and can typically complete the swap the same week we confirm the model. Most Therma-Tru impact garage door repairs and full door replacements in San Antonio run between $1,800 and $7,200 installed, depending on size, series, and whether you’re replacing a single section or the entire system. What usually brings a San Antonio homeowner to this page is a door that’s suddenly heavy, a corner that’s dented or separated after a storm, or a seal that’s letting dust and heat pour in from the driveway.
Key Takeaways:
- Therma-Tru impact garage doors are built for windborne debris zones, but the moving parts wear out on a predictable schedule in Texas heat.
- We install OEM Therma-Tru parts and, where it genuinely saves you money, tested aftermarket equivalents we’ve run on San Antonio homes for years.
- Every job starts with a written price and ends with a photo of the cleanup. No exceptions.
Which Therma-Tru Models This Applies To
Therma-Tru’s impact-rated garage door line spans several series, and matching the right part means knowing exactly which one is hanging on your tracks. The most common models we see in San Antonio are the Therma-Tru Gallery, Pulse, and the heavier Classic-Craft impact doors, each with different panel thicknesses, hinge spacing, and bottom-seal channel dimensions. The compatibility gotcha: a door with a Therma-Tru logo does not automatically share hardware with other Therma-Tru lines. A Pulse hinge will not sit flush on a Gallery frame, and forcing it chews up the stile within a season.
The fastest way to identify your door is to check the label on the inner panel edge, usually near the top section on the left side. That label carries the model line, manufacture date, and in many cases the specific panel profile code. If the label is faded or painted over, we measure the panel thickness, hinge-to-stile bolt pattern, and bottom seal channel depth during the free estimate. For most San Antonio homes, OEM parts are the right call on impact doors because wind-load certification depends on everything matching the original engineering. But for things like nylon rollers, torsion springs, and exterior weatherstripping, quality aftermarket parts often perform the same or better, and we’ll tell you when that’s true instead of defaulting to the pricier box.
A note on identity: we’re an independent San Antonio service provider. We install and service Therma-Tru products, but we are not the Therma-Tru factory. That independence means the recommendation you get from us is based on the door in front of you, not a corporate parts quota.
Styles & brands we work with
Signs Your Therma-Tru Impact Garage Doors Is Failing
- The door feels heavier than it did six months ago. Torsion springs lose tension over time, especially in San Antonio’s heat-cycling summers. A door that strains the opener is telling you the spring is near the end of its rated cycles.
- You see a visible gap at the bottom corner when the door is closed. The bottom seal channel on impact doors takes a beating from our concrete driveways and sun exposure. Once it deforms, dust, pests, and afternoon heat follow it in.
- One panel corner is dented or separated from the hinge stile. Impact doors are rated to take a hit, but repeated small strikes from bikes, trash cans, or hail eventually crack the panel edge where the hinge bolts anchor.
- The door judders or sags mid-travel. Worn nylon rollers and stretched cables change the door’s geometry on the track. Left alone, the extra stress travels into the opener gears and the top section brackets.
- You hear a grinding metal-on-metal sound. That’s almost always a roller bearing that’s given up. The roller still spins, but it’s tearing up the track, and the replacement cost goes up every week it runs.
See the difference
Before
After
Before
After
Before
AfterReplacement Cost & What’s Included
In San Antonio, here is what you should expect to pay for Therma-Tru impact garage door work:
- Single panel replacement (dent, crack, hinge tear): $450 to $1,100 per panel, including the panel, hardware, and on-site fitting.
- Full torsion spring replacement (pair): $280 to $490 installed, with a rated-cycle spring matched to your door weight.
- Complete bottom seal and weatherstripping kit: $120 to $310 installed, depending on seal profile and side channel replacement.
- Full Therma-Tru impact door replacement (single-car, 8×7): $1,800 to $3,800 installed, including track inspection, opener reconnection, and haul-away of the old door.
- Full Therma-Tru impact door replacement (double-car, 16×7): $4,200 to $7,200 installed, same inclusions.
What drives the range is real, not sales fluff: double-side steel with insulation costs more than single-side, windows in the top section add cost, and older San Antonio garages with settled slabs sometimes need track shimming before a new door will seal square. Every quote from us is a written, line-item price before any tool comes off the truck. If the number changes during the job, that’s on us, not you. The workmanship warranty covers the labor, and the parts carry their own manufacturer or aftermarket warranty, whichever applies.
DIY or Call Us?
Let’s be honest about where the danger lives. Torsion springs on an impact-rated garage door are under enough tension to break bone or worse if mishandled. Do not touch them. Do not try to adjust them. Do not watch a video and think you can wind one back. We replace these with the proper winding bars and a process we’ve repeated hundreds of times on San Antonio homes, and we still treat every one with respect. The same goes for the lift cables, which can slice through a glove in a heartbeat if a drum lets go.
What you can safely do is check the balance by pulling the red release handle and lifting the door manually. If it stays halfway up, the springs still have life. If it drops or shoots up, call us. You can also inspect the bottom seal for cracks and wipe down the track with a dry cloth. For everything else, especially anything involving springs, cables, or a panel removal where the door’s wind-load rating matters, the honest answer is to call (325) 420-4173 and let us take it from there.
FAQs
The door panels on a Therma-Tru impact door routinely last 20 to 25 years in San Antonio, but the springs, rollers, and seals will each need replacement one to three times in that window. Springs are usually the first to go, typically between 7 and 10 years depending on how often the door cycles. Call (325) 420-4173 and we’ll inspect all of it in one visit.
Yes, if the damage is in the skin and not the stile, we can sometimes repair and refinish a panel. But if the hinge bolts have torn free or the panel edge is separated, replacement of that one panel is the honest option, and it’s much cheaper than a full door replacement. We’ll show you the difference on the spot.
Most panel replacements take us 2 to 3 hours on-site. A spring replacement runs about 1 hour. A full Therma-Tru impact door swap is usually done in a single day, including haul-away and cleanup.
We keep common Therma-Tru-compatible rollers, springs, seals, and hinge kits on the truck. Unusual panel profiles or color-matched sections may need a 3 to 5 day order from the manufacturer. On the estimate, we’ll tell you exactly which category your door falls into so there is no scheduling surprise.
We carry parts for Therma-Tru, and we also stock service components for PGT, CGI, and CWS doors on the same trucks. If you’re in San Antonio and the door is acting up, call (325) 420-4173. We’ll send someone who knows the difference between a Gallery hinge and a Pulse hinge, and who will leave your garage floor cleaner than they found it. A well-fitted door does its work quietly, and that’s exactly how we like to work too. Call for a free estimate, and you’ll have a written price in your hand before anything gets taken apart.
Written by Keith Yamada, Owner, Lightwell Windows San Antonio at Lightwell Windows San Antonio, serving San Antonio and nearby areas.
Six Reasons Homeowners Choose Lightwell Windows San Antonio
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.