Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Therma-Tru Bathroom Remodeling: The San Antonio Owner’s Guide
Therma-Tru bathroom remodeling in San Antonio typically runs $9,000 to $28,000 fully installed, depending on bathroom size, finish selections, and whether you’re replacing a single damaged component or gutting to the studs. Most Therma-Tru door and trim issues we see are discovered during a bath refresh: a swollen entry door that binds on its frame, cracked fiberglass trim, or a tub surround that’s separated at the seams after years of San Antonio humidity cycling.
We stock and install Therma-Tru-compatible door slabs, frame kits, and weatherseals locally, and we work with Therma-Tru’s swing and sliding door lines daily. If you’re holding a Therma-Tru manual with a circled part number, bring it to the call. If you’re guessing at the model, we’ll identify it on-site by the stamped code on the door edge. Either way, the written price comes before a single tool gets unpacked.
Which Therma-Tru Models This Applies To
Therma-Tru makes three door lines you’ll typically find in San Antonio bathrooms: the Classic-Craft fiberglass, Smooth-Star fiberglass, and Pulse sliding doors. All three share the same hinge prep and frame profiles, but interior door slabs vary by thickness: standard bath doors are 1-3/8″, while pocket-door slabs and some older homes cut to 1-3/4″. If you replace the slab but reuse the old frame, the hinge locations have to match to within a 1/16″ or the door will never close square.
The gotcha we run into most often: Therma-Tru’s fiberglass entry doors cannot be trimmed more than 1/2″ off the bottom without voiding the structural integrity of the slab. Wood-composite and solid-core bath doors trim freely; fiberglass doesn’t. OEM Therma-Tru weatherseals and sill caps are worth the premium in bathroom settings specifically because they’re rated for standing moisture. A generic seal from a big-box store can pass visual inspection but allow air wicking at the threshold within a season. We stock OEM Therma-Tru frame kits, hinges, and sills in the truck, and can match aftermarket slabs from Masonite or Jeld-Wen when the budget calls for it.
Styles & brands we work with
Signs Your Therma-Tru Bathroom Remodeling Is Failing
- Door binds at the top corner or strike plate. This usually means the framing behind the hinge has settled or the slab swelled from repeated humidity. San Antonio’s clay-heavy soil moves, and homes built on pier-and-beam in neighborhoods like Alamo Heights or Terrell Hills shift seasonally. The door is rarely the culprit; the opening is.
- Visible cracking along the Therma-Tru fiberglass skin. Hairline cracks at the bottom corners or around the lock bore mean moisture has penetrated behind the gel coat. Once water gets inside the fiberglass mat, the door loses its rigidity, and the crack spreads with every open-close cycle.
- Black residue or mildew at the exterior bottom edge of the door. This is the weatherseal failing. Bathroom doors sit in the most humid room of the house, and the bottom sweep takes the brunt of it. If you see black lines on the threshold, the seal has compressed and is no longer doing its job.
- Loose or stripped hinge screws, especially on the jamb side. The jamb leaf loses its bite when the backing wood softens from water exposure. In San Antonio homes built before 1990, we regularly find the hinge shims were never installed behind the jamb, leaving only trim nails doing structural work.
- Sliding Therma-Tru shower door jumps its track or produces a heavy grinding sound. The roller cartridges are worn, or the track has bowed outward from wall movement. This is a two-person fix; the glass panel has to be lifted out and reset on fresh rollers.
Replacement Cost & What’s Included
Full bathroom remodels involving Therma-Tru product replacement in San Antonio run $9,000 to $28,000. A single interior door swap lands at the low end; a full gut including new Therma-Tru door, vanity plumbing, Schluter-strip tile edges, and walk-in shower work lands at the upper end. The range moves on three levers: bathroom square footage, whether the subfloor or framing needs repair once we open the wall, and your finish package.
Every quote includes the parts, haul-away of the old components, installation labor, and a written line-item price before work starts. We use the 365-Day Done Right Promise on all Therma-Tru work: if the installation isn’t right within one year of completion, we return and make it right at no cost to you. You’ll get the technician’s name and photo before arrival, and a photo ID badge at the door.
See the difference
Before
After
Before
After
Before
AfterDIY or Call Us?
You can safely diagnose most Therma-Tru bathroom door issues yourself: run a credit card along the weatherseal to find the gap, check the slab for visible corner cracks, and test the latch. But replacing a Therma-Tru slab or frame requires moving a door panel that can weigh 80 to 100 pounds, and resetting hinges to the 1/16″ tolerance I mentioned above. If the frame is out of square, no new door will hang right.
For sliding shower doors, the glass panel is tempered and heavy. A broken panel is a hospital trip. We handle it with the right lifting cups and shims every time. If you’re not sure which side of the line you’re on, call (254) 269-5071 and describe what you’re seeing. We’ll tell you straight whether it’s worth a service call or something you can handle with a screwdriver and patience.
FAQs
A properly installed Therma-Tru fiberglass door lasts 20 to 30 years in San Antonio bathrooms, provided the weatherseal is replaced every 5 to 7 years and the hinge screws are snugged when they loosen. Interior wood doors near steam showers fail faster due to direct moisture exposure. Call (254) 269-5071 and we’ll inspect yours during a free estimate visit.
Hairline fiberglass cracks can be epoxy-filled and refinished, but cracks longer than 6 inches or any crack near the hinge or lock bore means replacement is the better long-term move. The repair surface will not carry the same structural load. We’ll give you an honest repair-versus-replace recommendation on-site.
A single interior door swap takes one day from start to finish. A bathroom remodel involving Therma-Tru doors plus tub-to-shower conversion runs 3 to 5 working days. If the jamb needs reframing due to water rot, add a day.
We keep common Therma-Tru frame kits, hinge sets, and weatherseals on the truck for most San Antonio service calls. Non-stock items like custom slab sizes or Pulse shower door hardware ship from Therma-Tru in 3 to 7 business days. We’ll quote the lead time in writing before you commit to anything.
Contact Mason Remodeling Co San Antonio
We’re an independent San Antonio contractor, not a Therma-Tru dealer or affiliate. We also handle bath remodels featuring KraftMaid cabinetry, Cambria quartz, and Silestone surfaces if your project expands beyond the door. Call (254) 269-5071 to schedule your free written 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, Mason Remodeling Co San Antonio at Mason Remodeling Co San Antonio, serving San Antonio and nearby areas.
