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Therma-Tru Construction in San Bernardino, CA | Mason Remodeling
We provide independent Therma-Tru entry door service across San Bernardino, from multi-point lock rebuilds to full door replacements. What makes our work here different is simple: we know which Therma-Tru parts fail in this specific climate, and we carry the right fix before we ring your doorbell. If your Therma-Tru door is sticking, spinning, or sagging in San Bernardino, call Mason Remodeling at (803) 680-2547 for a free estimate.
Why San Bernardino Residents Choose Us for Therma-Tru Service

Therma-Tru is the entry-door standard in San Bernardino. We see their fiberglass and steel frames on nearly every block, from old California bungalows near downtown to the tract homes spreading up toward the foothills. We’ve replaced their multi-point locksets, re-set their adjustable sills, and re-glazed their decorative glass after years of inland heat and wind-driven grit. Isaac Pruett, our owner, grew up in the San Fernando Valley watching his finish-carpenter dad fix what the last guy did wrong, and he checks every Therma-Tru repair the same way: if the trim work is sloppy, the job isn’t done.
We are an independent remodeling contractor, not a Therma-Tru dealer or authorized service provider. We tell customers that plainly before any work starts. What we offer is hands-on familiarity with Therma-Tru sales & service across the Inland Empire, OEM-compatible parts, and a written price before any tool is unpacked.
Styles & brands we work with







Common Therma-Tru Construction Problems We Solve in San Bernardino
- Multi-point lock gearboxes that seize after dust intrusion. Santa Ana winds push fine grit through San Bernardino every fall, and that grit works its way into Therma-Tru lock channels. Add 100°F+ summer heat cycling, and the grease in a Fiber-Classic gearbox turns to paste. The handle spins, the door won’t latch, and you’re late for work.
- Cracked adjustable composite sills. Therma-Tru’s adjustable sills are great until inland heat dries them out. Once they crack, wind-driven rain and dust reach the bottom rail. In older San Bernardino entries, that means rot in the subfloor you can’t see until it’s expensive.
- Faded, chalky fiberglass skins on south- and west-facing doors. San Bernardino sits at roughly 1,000 feet of elevation with punishing UV. Smooth-Star and Classic-Craft doors on west-facing entries fade, chalk, and develop hairline cracks. It’s not a cleaning problem; it’s the skin breaking down.
- Steel Benchmark doors rusting at the bottom rail. Sprinkler overspray against the jamb, season after season, and the bottom rail of a steel Benchmark door rusts through. We see this constantly on homes where the landscaping runs right up to the entry.
- Hinge sag from grit-loaded hinge barrels. The same dust that kills lock gearboxes also packs into hinge barrels. A Therma-Tru door in San Bernardino that drags on the latch side usually has three hinges full of fine grit, not a structural problem.
Therma-Tru Service in San Bernardino: What Local Conditions Mean for Your Equipment

San Bernardino sits in a high-wind and dust zone. Santa Ana winds push fine grit and heat across the city in fall, and that grit gets into Therma-Tru multi-point lock channels and hinge barrels. We see lock and hinge failures here far more than panel failures. A homeowner in, say, Tustin or Mission Viejo might replace a Therma-Tru door because the skin faded. In San Bernardino, we’re replacing gearboxes and resetting sills. The door panel itself is often fine for another decade. That’s the difference local knowledge makes: we don’t sell you a $4,000 door when a $400 OEM lock cassette and a sill reset solve the problem.
On a 1990s tract home off Del Rosa Avenue in San Bernardino, our tech was called for a Therma-Tru Fiber-Classic front door that wouldn’t latch. The multi-point gearbox was packed with dust and dried grease, and the adjustable sill had cracked after years of heat. We replaced the gearbox with an OEM Therma-Tru cassette, reset the sill, and adjusted the three hinges. The door has latched cleanly through two summers since.
Therma-Tru Models & Products We Service in San Bernardino
We work on Therma-Tru Smooth-Star fiberglass entry doors, Fiber-Classic fiberglass doors, Classic-Craft collection doors, and Benchmark steel entry doors. Our approach is repair-first when the panel is structurally sound: we source OEM Therma-Tru replacement sills, hinges, and multi-point lock bodies, because aftermarket lock cassettes often don’t align with the original face boring. When the slab is warped, delaminated, or the frame has rot at the sill, we recommend replacement rather than chasing repairs that won’t last another San Bernardino summer. We stock the most common OEM Therma-Tru lock cassettes and sills locally, so turnaround is fast for homeowners across San Bernardino service area.
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AfterTherma-Tru Service Pricing in San Bernardino

Door-specific work runs on a diagnostic-first model. A multi-point gearbox replacement or sill reset typically falls between $400 and $1,800 depending on the part and the condition of the surrounding frame. Full door replacement starts around $8,000 and can reach $20,000 when stucco repair, trim work, and custom finishes are involved. Here’s how our General Contractor in San Bernardino prices related construction services:
| Service | Typical Range in San Bernardino |
|---|---|
| Kitchen Remodel | $14,000 – $45,000 |
| Small Kitchen Remodel | $9,000 – $20,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Roof Repair | $400 – $1,800 |
| Roof Replacement | $8,000 – $20,000 |
Every estimate is free and written before any work starts. You’ll know the exact price, not a range that grows later. Call (803) 680-2547 and we’ll schedule a walkthrough at your San Bernardino home.
Serving San Bernardino, CA - Our Local Coverage Area
We’re based in the San Bernardino 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 Bernardino
The multi-point lock gearbox inside your door is likely seized with dust and dried grease. Santa Ana winds push fine grit into the lock channels every fall, and summer heat bakes the lubricant solid. The fix is usually an OEM Therma-Tru gearbox replacement, not a whole new door. Call (803) 680-2547 and we’ll diagnose it on site.
Yes, in most cases. If the door slab is still structurally sound and the frame has no rot at the sill, we replace just the adjustable sill with an OEM Therma-Tru unit. If water has already reached the subfloor, replacement becomes the honest option. We’ll show you the condition before we quote either path.
It’s common in San Bernardino, but not something you have to live with. West- and south-facing Therma-Tru doors take intense UV at our elevation, and the fiberglass skin eventually fades and chalks. We can re-glaze and refinish the panel, or if the skin is cracked through, a new slab makes more sense. Either way, you’ll get a written price first.
We use OEM Therma-Tru parts whenever the door panel is still structurally sound. Aftermarket lock cassettes often don’t align with the original face boring, and a misaligned cassette means a door that binds and a callback nobody wants. If the OEM part can’t be sourced, we’ll tell you before ordering anything.
Sometimes. Older San Bernardino homes often have stucco returns and trim built tight to the original door frame. When we pull the frame, we may need to patch and re-texture the surrounding stucco, which adds to the job. We’ll flag it during the estimate so there’s no surprise on the invoice. Call (803) 680-2547 for an exact quote.
Service Areas Near San Bernardino
We serve homeowners throughout the Inland Empire and beyond. If you’re just outside San Bernardino, we also provide Therma-Tru service in Fontana and Therma-Tru service in Moreno Valley. Our crews also cover Colton, Rialto, Redlands, Highland, and Loma Linda regularly.
Book Your Therma-Tru Service in San Bernardino Today
Know who’s coming, know what it costs, know it’s backed up – everything else is just noise. Call (803) 680-2547 or schedule online for a free Therma-Tru estimate in San Bernardino. A live person answers, and your written price comes before any work begins.
Written by Isaac Pruett, Owner at Mason Remodeling, serving San Bernardino since 2004.











