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Therma-Tru Construction in San Antonio, TX | Mason Remodeling Co San Antonio
Therma-Tru doors in San Antonio fail in predictable, avoidable ways – the clay soil shifts, the summer heat bakes the fiberglass, and suddenly the deadbolt won’t throw. We’re Mason Remodeling Co San Antonio, a General Contractor in San Antonio and an independent Therma-Tru service provider (not manufacturer-affiliated), and we fix these problems across Bexar County every week. The difference here is that we treat the door and the slab as one system, because in San Antonio they absolutely are. Call (254) 269-5071 for a free estimate.
Why San Antonio Residents Choose Us for Therma-Tru Service
We know Therma-Tru construction the way you can only know it by taking doors apart in this city’s specific conditions. Our crews have rebuilt and repaired Therma-Tru entry systems across every slab-on-grade and pier-and-beam foundation type in Bexar County, learning exactly how our soils punish these doors and which reinforcements actually survive a flash-drought summer. Therma-Tru sales & service is a focused discipline for us, not a side job.
Isaac Pruett, our owner, spent two decades swinging hammers across the Southwest before landing in San Antonio, and he’s the one who taught our crew to check the slab before touching the hinges. That order of operations matters here. A door that won’t latch is rarely just a door problem in this city – it’s usually the ground under the door talking. We inspect the rough opening, the threshold, the strike plate screws, and the foundation movement all at once. Then we fix the root cause, not just the symptom. And before any of our uniformed, background-checked technicians arrive, you get their name and photo. The written price comes before work starts. The 365-Day Done Right Promise covers what we do for a full year after completion.
Styles & brands we work with
Common Therma-Tru Construction Problems We Solve in San Antonio
- Blistered fiberglass skins on west-facing doors. Polyurethane foam cores delaminate from the fiberglass skin after repeat heat-soak cycles above 100°F. In San Antonio, a west-facing Therma-Tru door in Alamo Heights can sit in 140°F surface heat for hours every afternoon from June through September. The result is visible blisters near the slab edges and a door that looks ten years older than it is. We can repair small blisters; when more than 20% of the face is compromised, replacement is the honest call.
- Strike plates torn out of pine frames. Post-tension slabs flex through August, and when the rough opening shifts out of square, the strike plate screws shear. This is one of the most common Therma-Tru failures we see in San Antonio, especially on 1970s-1990s doughnut houses across the north and west sides. The fix is a long-throw strike plate anchored into the stud, not just longer screws into a splintered jamb.
- Bottom sweeps and astragals cracked from low humidity. San Antonio’s flash-drought pattern pulls moisture out of rubber and vinyl seals faster than anywhere on the Gulf Coast. The sweep hardens, cracks, and suddenly dust and scorpions are coming in under the door. We replace with factory Therma-Tru sweeps when the door is under 20 years old, or proven aftermarket equivalents that match the original geometry for older units.
- Factory hinges binding as the frame twists. Clay shrink cycles through a dry summer can move a door frame enough that factory hinges creak and bind every time the door swings. We see it constantly on Therma-Tru Smooth-Star and Pulse Series doors in neighborhoods with mature trees and heavy clay, where the soil pulls away from the foundation unevenly. We reset the hinges and re-shim the frame, and the door swings clean again.
- Doors that stop latching in late summer. This is the classic San Antonio Therma-Tru complaint. On a pier-and-beam house in Terrell Hills, a door can drop a full inch between June and late August as the clay shrinks. The strike plate misses the latch entirely. The door isn’t broken – the house moved. We reset thresholds and re-shim frames in September when the rains swell the clay back, and the latch lines up again.
Therma-Tru Service in San Antonio: What Local Conditions Mean for Your Equipment
San Antonio is one of the only cities in Texas where a Therma-Tru door failure is as much a soil mechanics problem as a door hardware problem. The city’s expansive clay soils shrink and swell dramatically with moisture, and our flash-drought pattern means a door hung in May can be out of square by Labor Day. In neighborhoods like Alamo Heights and Terrell Hills, a 1950s pier-and-beam house can drop an inch just during a dry summer, and local foundation crews know that late August is when the most dramatic cracks suddenly appear overnight. A contractor from Austin or Dallas would not plan for that on day one. We do. When we service a Therma-Tru door in San Antonio, we check the slab or the piers first, because the door is just the visible part of the problem. Our crew pulled a Fiber-Classic Mahogany unit on a 1987 slab-on-grade house in the Whispering Oaks neighborhood after the deadbolt stopped engaging. The post-tension slab had lifted one corner 5/8 inch during a dry spell, twisting the frame and shearing the original strike plate screws. We re-shimmed the frame with composite horseshoe spacers, installed a long-throw stainless strike plate into the stud beyond the door frame, and replaced the cracked Therma-Tru bottom sweep that had been letting dust blow into the entry. The door now swings dead-square and the bolt throws cleanly even as the slab moves. That’s Therma-Tru service done the San Antonio way, and it’s the only way that holds up here.
Therma-Tru Models & Products We Service in San Antonio
We service the full line of Therma-Tru residential entry systems: Smooth-Star Fiberglass Entry Doors, Tru-Defense Door System, Fiber-Classic Mahogany Collection, and Pulse Series Doors. Our parts philosophy is straightforward. When the door is under 20 years old, we use factory Therma-Tru components – sweeps, astragals, strike plates, hinges – because the OEM geometry is exact and the fit matters. For older units where Therma-Tru has discontinued the part, we source proven aftermarket parts that match the original dimensions, never generic hardware-store substitutions. We keep common San Antonio-failure parts stocked locally, which means most Therma-Tru repairs don’t wait on a shipping delay. If the fiberglass skin is blistered across more than 20% of the face or the frame has pulled over 3/8 inch from slab movement, we’ll tell you straight: replacement with a fresh Tru-Defense system costs less long-term than repeated frame repairs.
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AfterTherma-Tru Service Pricing in San Antonio
What you’ll pay depends on what the door and the slab are doing. Here are the numbers we quote most often in San Antonio, and we deliver a written price before any work starts – never a verbal estimate that grows on the final bill.
| Service | Price Range |
|---|---|
| Therma-Tru door frame re-shim and strike plate repair | $350 – $900 |
| Therma-Tru fiberglass entry door replacement (installed) | $1800 – $6500 |
| Full Kitchen Remodeling (often paired with new entry door) | $14000 – $45000 |
| Home Addition (new Therma-Tru entry included) | $45000 – $130000 |
The price range covers what we find when we open the door up: a simple re-shim is at the low end, a full frame rebuild with a new door is at the high end. Every estimate is free, and every project gets a written Guarantee with stated terms, including a free return visit at no charge if a repair fails. Call (254) 269-5071 to schedule your free estimate.
Serving San Antonio, TX - Our Local Coverage Area
We’re based in the San Antonio area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs – Therma-Tru Construction in San Antonio
Your slab or piers moved. Late August is when San Antonio’s expansive clay is at its driest and most shrunken after a flash-drought summer, and doors on post-tension slabs and pier-and-beam homes can drop or shift enough that the strike plate misses the latch entirely. We reset thresholds and re-shim frames in September when the rains return, but we can also re-align the strike plate now so the door latches until the soil settles. Call (254) 269-5071 and we’ll diagnose it on site.
If blisters cover less than 20% of the face and the core hasn’t delaminated, repair is usually the cheaper path and we can match the factory texture closely. If the blistering is widespread or the skin has separated from the foam core, replacement with a new Therma-Tru Tru-Defense door costs less over five years than chasing repairs that keep failing in the afternoon sun. We’ll show you both numbers in writing before you decide.
Replace the bottom sweep and check the astragal. San Antonio’s low-humidity summers crack the original rubber and vinyl seals faster than in a coastal climate, and once that seal fails, dust and scorpions have a clear path in. We install factory Therma-Tru sweeps or matched aftermarket equivalents, and we check the threshold height so the new sweep actually makes contact. Call (254) 269-5071 for a free estimate on replacing your door seals.
Yes, and we’ve done it. Historic limestone homes in King William have thick, irregular rough openings that don’t match modern door dimensions, so we build custom jamb extensions and use careful shimming to fit a Therma-Tru Smooth-Star or Fiber-Classic door without cutting into the original stone-part of our Bathroom Remodeling in San Antonio craftsmanship. We protect the vintage trim and match the threshold height to the finished floor. Schedule a free estimate at (254) 269-5071 and we’ll measure the opening and give you a written price.
Because the door frame twisted. San Antonio’s clay shrinks through the dry summer and swells after rain, and the uneven movement shifts the rough opening out of square, which binds the hinges. It’s not a hinge defect – it’s the ground moving under the door. We re-shim the frame and reset the hinges so the door swings freely again, and we address the slab movement so it doesn’t return next summer. Call (254) 269-5071 to get it looked at.
Service Areas Near San Antonio
We provide Therma-Tru construction service throughout San Antonio proper and the surrounding communities. Our crews regularly work in Terrell Hills, Boerne, Selma, Cibolo, and Leon Valley. For residents west of the city, we offer Therma-Tru service in Boerne, and for those northeast along the I-35 corridor, Therma-Tru service in Selma. See our San Antonio service area page for full coverage details.
Book Your Therma-Tru Service in San Antonio Today
If your Therma-Tru door is blistering, binding, or not latching, don’t wait for the next dry spell to make it worse. We provide Therma-Tru repair and replacement throughout San Antonio, with written pricing before any work starts and a 365-Day Done Right Promise on everything we do. Call (254) 269-5071 to schedule your free estimate. Know who’s coming, know what it costs, know it’s covered – that’s the whole job before the job starts.
Written by Isaac Pruett, Owner at Mason Remodeling Co San Antonio, serving San Antonio since 2004.
