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Therma-Tru Construction in Santa Cruz, CA | Iron Beam Contractors
We’re Iron Beam Contractors, and we provide independent Therma-Tru door construction, installation, and repair across Santa Cruz. We are not a manufacturer-authorized dealer, and that’s a distinction worth understanding before you hire anyone. The thing that makes our Therma-Tru work different here is simple: we know how these doors fail in a marine-layer climate, and we know how Santa Cruz’s coastal permitting process can turn a one-week door swap into a six-week headache if you don’t plan for it. Call (833) 756-5936 for a free estimate.
Why Santa Cruz Residents Choose Us for Therma-Tru Service
Most Santa Cruz General Contractor firms can hang a door. Very few can tell you why a Therma-Tru Fiber-Classic door delaminates on a south-facing Seabright bungalow but holds up fine two miles inland. Our team has installed and serviced hundreds of fiberglass and steel entry doors across Santa Cruz County, and that repetition teaches you things no spec sheet will. Therma-Tru builds a good door. But coastal air, salt, and a 1920s pier-and-post foundation will test any door system harder than a tract home in San Jose ever will.
Nolan Driscoll, our owner, spent two-plus decades framing and reinforcing structures before he built Iron Beam Contractors. When we open up a rough opening and find rotted framing behind a failed threshold, we don’t just swap the door and call it done. We fix the opening, flash it correctly, and specify materials that hold up to Santa Cruz’s specific conditions. That’s the difference between a door that works for five years and one that works for twenty.
Styles & brands we work with
Common Therma-Tru Construction Problems We Solve in Santa Cruz
- Delaminated fiberglass skins on south-facing entries. Marine-layer damp is the culprit most people never see coming. In Seabright and the lower Westside, south-facing Therma-Tru doors absorb moisture into the skin edge over years, and eventually the skin separates from the core. We see it regularly on doors that were never properly sealed at the base.
- Corroded steel frames and hinges on beach-flat homes. Salt air doesn’t need to touch a door directly. It rides in on the breeze and settles on steel frames, hinges, and multipoint lock hardware. Doors start to stick, then bind, then refuse to latch. We replace corroded components and, where it makes sense, upgrade to stainless hardware.
- Failed weatherstripping and threshold seals on 1990s-era Therma-Tru doors. The original seals on those doors were never designed for Santa Cruz’s damp winters. Once they fail, water gets into the rough opening and starts eating the subfloor. By the time you notice the door sticking, the framing underneath may already be compromised.
- Racking and binding doors on pier-and-post foundations. Pre-1950s homes on the Westside and in Seabright sit on foundations that move. If a Therma-Tru door was installed on an opening that wasn’t properly shimmed and flashed, the door will rack as the house settles and eventually bind against the frame.
- Water intrusion through the sill on high-water-table lots. Beach-flat homes sit close to groundwater, and that means moisture wicking up from below. A door sill installed without a proper pan and flashing detail will pull that moisture into the rough opening, and you’ll see rot start within a few years.
Therma-Tru Service in Santa Cruz: What Local Conditions Mean for Your Equipment
Here’s a fact about Santa Cruz most contractors from over the hill don’t plan for: much of the residential area west of Highway 1 falls inside the coastal zone, which means Coastal Commission review can apply to door replacements that are visible from the street. That’s not a nuisance, it’s a timeline. A straight door swap that would take two days in Scotts Valley can take weeks in Seabright or the Westside if the replacement door doesn’t fit the coastal design guidelines for the neighborhood. We navigate this by specifying Therma-Tru door styles that the reviewers will approve, not just the first door that fits the opening. If you’re in the Seabright or Westside historic districts, the style of your door isn’t an aesthetic choice. It’s a permit condition. We plan for that before we order materials, so your project doesn’t stall in design review while a door sits in a warehouse.
Therma-Tru Models & Products We Service in Santa Cruz
We work on the full range of Therma-Tru residential door systems: the Fiber-Classic Collection, the Smooth-Star Collection, the Ever-Strait Fiberglass Door System, and the Classic-Craft Collection. For critical components like door slabs, frames, and multipoint locks, we source OEM Therma-Tru parts so the fit and finish match the original installation. For weatherstripping, thresholds, and seals, we often specify high-quality aftermarket options that outperform OEM in coastal conditions. Those aftermarket seals are what we stock locally, which means faster turnaround when a door needs to be weather-tight before the next rain hits. See our full Therma-Tru sales & service coverage for details on parts sourcing and lead times.
See the difference
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AfterTherma-Tru Service Pricing in Santa Cruz
Most of the Therma-Tru work we do in Santa Cruz falls into a few predictable price bands. A full window replacement package runs $4,500 to $15,000 depending on count and glass package. A home addition that includes new Therma-Tru entry doors and exterior envelope work typically lands between $45,000 and $130,000. ADU construction, which often includes multiple Therma-Tru doors and all associated flashing and sill details, runs $90,000 to $220,000. Door-only repairs and replacements are scoped on a per-opening basis and depend on what we find when we pull the trim. Every free estimate includes a written line-item breakdown, and we don’t change the number once we start unless you change the scope. Call (833) 756-5936 to schedule yours.
| Project Type | Price Range |
|---|---|
| Window Replacement | $4,500 – $15,000 |
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
Serving Santa Cruz, CA — Our Local Coverage Area
We’re based in the Santa Cruz area and also offer Therma-Tru service in Twin Lakes and surrounding communities. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Therma-Tru Construction in Santa Cruz
It depends on where you live. West of Highway 1, many residential areas fall inside the coastal zone, and door replacements visible from the street can trigger design review. We can tell you whether your address falls in that zone before you spend money on a door, and we offer Therma-Tru service in Mount Hermon as well. Call (833) 756-5936 and we’ll check it during the free estimate.
The marine layer delivers moisture that works its way into unsealed door skin edges, eventually causing the skin to separate from the core. South-facing entries in Seabright and Westside bungalows are the most vulnerable because they get morning sun after a damp night, which drives moisture deeper into the material. Proper sealing and sill pan installation stops this. A door that was prepped wrong will fail no matter what brand it is.
We can sometimes repair minor delamination where the skin is intact and the core is still solid. But if the delamination is extensive or the rough opening has rot behind the frame, replacement is usually the more cost-effective fix. We’ll show you what we find before we recommend anything.
In the Seabright and Westside historic districts, coastal design guidelines generally favor door styles that match the era of the home, which often means Classic-Craft collection models with traditional panel profiles over the smoother, more contemporary Smooth-Star line. We specify the right model from the start so your replacement doesn’t stall in design review. Call (833) 756-5936 and we’ll match a door to your home’s era and your permit requirements.
We install a proper sill pan under every exterior door, flash the rough opening at the base and sides, and use rot-resistant materials when we rebuild any framing that has already started to decay. On beach-flat lots, we also pay close attention to grade level and drainage so water isn’t directed toward the threshold. That’s the difference between a door that lasts and one that rots from the bottom up.
Service Areas Near Santa Cruz
We serve all of Santa Cruz, including the 95065, 95060, 95061, and 95062 ZIP codes. We also work in the surrounding communities of Pasatiempo and Scotts Valley, where coastal permit rules ease up but the marine layer never fully disappears. If you’re nearby, see our Santa Cruz service area page for coverage details, or jump directly to Therma-Tru service in Pasatiempo and Therma-Tru service in Scotts Valley.
Book Your Therma-Tru Service in Santa Cruz Today
If your Therma-Tru door is sticking, leaking, or delaminating, don’t wait for the next rain to find out what’s behind it. Call (833) 756-5936 and we’ll schedule a free estimate. We’ll inspect the door, the rough opening, and the sill, then tell you exactly what needs to happen and what it costs.
Written by Nolan Driscoll, Owner at Iron Beam Contractors, serving Santa Cruz and surrounding areas.