Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Why San Bernardino Homeowners Choose Therma-Tru Construction
We provide independent Therma-Tru in Fontana, door installation, repair, and refinishing service throughout San Bernardino, focusing on the Fiber-Classic, Smooth-Star, and Traditions lines that account for most of the entry systems in this market. Our crews work on the whole door system, not just the slab: jambs, adjustable sills, weatherstripping, hinges, sidelites, and patio door tracks. We’re not a Therma-Tru dealer and we don’t claim manufacturer authorization, which means we give homeowners straight answers about what’s worth fixing and what’s better off replaced, without a sales quota behind the recommendation. Call (855) 473-5620 to get a free estimate on Therma-Tru work in San Bernardino.
San Bernardino’s climate does specific things to entry doors. Hot summers that top 100°F and relentless UV break down fiberglass gel coats faster than anything coastal. Santa Ana winds push dust and grit into every track, hinge, and sweep. Homes built in the 1950s through the 1970s, the bulk of San Bernardino’s housing stock, often still have original door openings that need adjustments when we set a new Therma-Tru slab. We’ve learned what works here and what doesn’t, and that’s the information you’ll get from us, whether you need Therma-Tru repair in Bloomington or nearby.
Why Trust San Bernardino Contractors for Your Therma-Tru Construction?
Therma-Tru doors are not one-size-fits-all products. The Fiber-Classic line uses fiberglass skins over a composite frame; Traditions doors are steel over wood stiles; Smooth-Star doors have a denser, smoother fiberglass face. Each one handles San Bernardino’s inland heat and seasonal slab movement differently, and each one needs a different hand when it starts acting up. Our crews know the difference because we’ve pulled these doors apart and put them back together across the Inland Empire.
Ruben Castillo, our owner, grew up in the Westside neighborhood of San Bernardino watching his uncle reroof houses and frame garages. He went through construction technology training at San Bernardino Valley College, where he learned to read plans and understand load paths before he ever touched a door. That background matters when you’re setting a Therma-Tru slab true in an opening that’s shifted a quarter inch over forty years of alluvial soil settlement. We use OEM Therma-Tru sills, sweeps, hinges, and weatherstrip whenever the frame and slab are sound, because aftermarket parts that are a few thousandths off will show up as an air leak or a sticking latch within a season. If it’s not built right the first time, you’re just paying for it twice.
We work on Therma-Tru doors as part of larger projects too. Window replacement, impact window packages, and home additions that call for a Therma-Tru entry or patio door; all of it runs through one crew and one point of accountability. No subcontractor shuffle.
Styles & brands we work with
Common Therma-Tru Construction Problems We Fix in San Bernardino
- Chalking and hairline cracks on Fiber-Classic doors. South- and west-facing entries in San Bernardino take direct afternoon sun, and after years of 100°F summers the gel coat on fiberglass skins starts to chalk and develop fine surface cracks. The door itself is usually still structurally sound. We sand, prep, and refinish the skin rather than pushing a new slab. Done right, the finish holds through multiple hot seasons.
- Rust at the bottom rail of Traditions steel doors. The factory paint barrier on a Traditions door gets breached by sprinkler splash, scuffs from shoes, or stones kicked up by a mower. Once moisture works into the bottom rail and hinge-side edges, rust follows. We catch it early by stripping, treating, and repainting the affected area. When rust has eaten through the rail, replacement is the honest call; patching rust-through on a steel door in this climate buys six months, not a fix.
- Sticking latches on Fiber-Classic and Smooth-Star doors. San Bernardino’s alluvial soils move. Slabs shift seasonally, and a door that latched cleanly in January can stick in August. The fix is usually resetting the adjustable sill and re-torquing hinge screws, not shaving the slab. We see this every summer.
- Hard-sliding Therma-Tru patio doors. Dust and grit from Santa Ana winds settle in the bottom track, bind the rollers, and make the panel feel like it’s dragging concrete. We pull the panel, clean the track, replace worn rollers, and reset the threshold. Most hard-sliding patio doors don’t need replacing; they need the track and hardware serviced.
- Worn sweeps and weatherstrip. The rubber sweep on a Therma-Tru bottom rail degrades in San Bernardino heat, typically within three to five years. A worn sweep lets draft, dust, and bugs in. It’s a cheap fix with the right OEM part, but skipping it costs you in cooling load and comfort.
Therma-Tru Parts & Our Repair-vs-Replace Approach
We stock Therma-Tru OEM replacement sills, sweeps, hinge screws, and weatherstrip for the common Fiber-Classic, Smooth-Star, and Traditions models we see in San Bernardino. When the frame and slab are sound, OEM parts are the only ones we’ll use; the tolerances on Therma-Tru’s adjustable sills and weatherstrip channels are tight, and a generic sweep will gap or drag from day one.
Our repair-or-replace decision is simple. We repair when the structure is sound. A chalked fiberglass skin gets refinished. A sticking latch gets a sill reset. A rusted bottom rail that hasn’t compromised the steel gets treated and repainted. We recommend replacement when the slab is warped beyond adjustment, when rust has eaten through a Traditions rail, or when the cost of repeated service calls over the next three years exceeds the value of the door. And we’ll walk you through those numbers before you spend a dime. Call (855) 473-5620 to talk through what your door actually needs.
Our Therma-Tru Service Process – Step by Step
- 1
On-site diagnosis. We inspect the full door system: slab, jambs, adjustable sill, hinges, weatherstrip, and threshold. We check for plumb, square, and seasonal movement, then tell you what’s wrong in plain terms.
- 2
Repair or install. If it’s a repair, we use OEM Therma-Tru parts where they matter; refinishing for chalking skins, sill resets for sticking latches, rust treatment for Traditions steel. If it’s an install, we shim and set the frame to the actual opening, not a theoretical one, then hang the slab and adjust the sill to seal correctly.
- 3
Test and adjust. We cycle the door at least a dozen times, adjust the latch and sweep, and check the reveal on all four sides. If a patio door is involved, we run the panel through its full travel and make sure it rolls smoothly.
- 4
Warranty paperwork support. We document all parts and work, and we’ll help you file any Therma-Tru warranty claim that applies to the door itself. We stand behind our labor separately.
See the difference
Before
After
Before
After
Before
AfterTherma-Tru Products We Service & Install in San Bernardino
We service and install the Therma-Tru lines most common in San Bernardino homes: Fiber-Classic Collection fiberglass entry doors, Smooth-Star Collection smooth fiberglass doors, Traditions Collection steel entry doors, and Therma-Tru patio door systems with rot-resistant frames. That includes sidelites, transoms, and multi-point lock systems. We stock OEM sills, sweeps, and weatherstrip for these products, and we can source full door systems for home additions and replacement projects. Whether you’re adding Therma-Tru in Rialto or a Therma-Tru entry door to a home addition in the 92411 ZIP code or replacing a west-facing door that’s been sun-baked for thirty years, we handle the product from frame to finish.
We Also Service These Brands
Therma-Tru isn’t the only brand we know well. We work across KraftMaid cabinetry, Cambria and Silestone countertops, and Kohler plumbing fixtures, which matters when your door project touches a kitchen, bath, or entry remodel. You pick the brand, we handle the build.
FAQs – Therma-Tru Construction Service in San Bernardino
Yes. When the fiberglass skin is chalked or has fine surface cracks but the door is structurally sound, we sand, prep, and refinish it with a coating system that holds up to San Bernardino UV exposure. Most Fiber-Classic doors we see in San Bernardino don’t need replacing; they need refinishing and a sill adjustment. Call (855) 473-5620 and we’ll tell you which one yours is.
Steel Traditions doors rust when the factory paint barrier gets breached; sprinkler splash, scuffs, or grass clippings against the bottom rail are enough to start it. Once moisture reaches the steel, rust follows. We treat and repaint the affected area when it’s caught early; when rust has eaten through the rail, the door needs replacement. Either way, the first step is a free inspection at (855) 473-5620.
Usually not. In San Bernardino, hard-sliding patio doors are typically caused by dust and grit from Santa Ana winds packing the bottom track and binding the rollers. We pull the panel, clean the track, replace worn rollers, and reset the threshold. A new door is the last option, not the first.
In many cases, yes. If your addition is in the foothill neighborhoods east of Waterman Avenue, Cal Fire ignition-resistant construction standards may require specific door and glazing ratings. Even in Therma-Tru in Glen Avon and the flat parts of San Bernardino, current building codes often require tempered or impact-rated glazing in sidelites and transoms. We’ll flag the requirement before we order the door, not after it’s on the truck.
We document all parts and work with receipts and photos, and we’ll help you file a warranty claim directly with Therma-Tru if the door itself has a manufacturing defect. Our labor is warranted separately. Being independent doesn’t change the warranty on your door; it just means we don’t answer to a sales manager when we tell you the truth about what’s fixable.
It depends on the scope, and here are real ranges for San Bernardino projects that involve Therma-Tru doors:
| Service | Typical Range |
|---|---|
| Window Replacement (including Therma-Tru door and sidelite integration) | $4,500 – $15,000 |
| Impact Window Installation (door and window package) | $8,000 – $25,000 |
| Home Addition (with Therma-Tru entry and patio doors) | $45,000 – $130,000 |
A sill reset, sweep replacement, or hinge adjustment costs far less than the ranges above; a full door replacement lands at the lower end of the window replacement range or below. Call (855) 473-5620 for an exact quote, and we’ll give you a written line-item estimate before any work starts.
Book Your Therma-Tru Service in San Bernardino, CA
If your Therma-Tru door is chalking, sticking, or sliding hard, or if you’re planning a San Bernardino home addition and want a Therma-Tru entry system set correctly on day one, call us at (855) 473-5620. We’ll schedule a free estimate and walk you through exactly what your project needs.
Written by Ruben Castillo, Owner at San Bernardino Contractors, providing independent Therma-Tru service across San Bernardino.