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Therma-Tru Construction in Bonny Doon, CA | Iron Beam Contractors
We handle Therma-Tru entry door replacement, re-framing, and re-flashing across Bonny Doon, and the one thing that sets our work apart here is that we plan for what this mountain actually does to a door opening. Steep grades, wet winters, and Santa Cruz County WUI codes all hit a Therma-Tru install differently than a flatland tract home. Call (833) 756-5936 for a free estimate.
We are an independent contractor and are not authorized, sponsored, or endorsed by Therma-Tru. What we bring is years of setting, re-framing, and re-flashing Therma-Tru in Mount Hermon, Felton, Pasatiempo, Ben Lomond, and across the Santa Cruz Mountains, enough to know exactly how these systems fail up here long before a showroom rep would.
Why Bonny Doon Residents Choose Us for Therma-Tru Service
Most door crews offering Therma-Tru repair in Felton know how to set a prehung unit on a level slab in a sunny subdivision. Bonny Doon almost never gives you that site. Around here a Therma-Tru entry has to be squared into a rough opening that may have racked a quarter-inch after a wet winter on a slide-prone slope, and it has to shed water away from a north wall that stays damp for months.
Our owner, Nolan Driscoll, built Iron Beam Contractors on a rule that fits this town perfectly: we tell you exactly what’s in the wall before we open it, not after. That means we quote the re-framing, the sill pan, the flashing, and the WUI detailing up front instead of “discovering” them mid-job. You get one contractor accountable for the whole entry, from rough opening to final inspection.
Styles & brands we work with







Common Therma-Tru Construction Problems We Solve in Bonny Doon
- Binding slabs and misaligned locks after a wet winter. Compression from steep, settling hillside lots torques the rough opening. The door doesn’t fail at install; it fails after the ground moves. We re-square the opening and re-set the slab so the latch actually catches.
- Rotted bottom rails and sills on shaded, damp entries. Winter rain driven sideways against exposed ridge-top entries wicks past worn sweeps and thresholds. Bonny Doon’s north walls hold that moisture, and the bottom rail turns soft. We replace the sill and rail with Therma-Tru OEM parts so the engineered profile actually matches.
- Chalked, peeling finishes on Fiber-Classic and Smooth-Star faces. Repeated sun/rain cycles at elevation break down factory stain and paint faster than flatland exposure. Shaded sides never fully dry, so the finish goes chalky early. We re-finish or, when it’s too far gone, replace the slab.
- Missing flashing and sill pans on post-CZU rebuilds. Some additions set new Therma-Tru doors into walls built to older details. No pan, no ember-resistant sealing. We find it only after the door leaks or a WUI inspection flags it. We rebuild the threshold properly.
- Lock throw plates that no longer line up because the header settled. A telltale sign the structure moved above the door, not that the hardware failed. We fix the opening, not just the latch.
Therma-Tru Service in Bonny Doon: What Local Conditions Mean for Your Equipment
Bonny Doon is unincorporated, so a Therma-Tru entry replacement that alters an opening or adds a sidelite is permitted and inspected through Santa Cruz County, not a city counter. That’s a real distinction with real consequences. After the CZU Lightning Complex fire, WUI ignition-resistant exterior detailing gets reviewed alongside that door permit on wooded lots where a concrete truck often can’t reach the driveway. So a simple door swap here can become a two-permit job the moment you widen the rough opening or add a sidelite. We handle that sequencing for you. It also means we plan deliveries for pump trucks, short loads, or on-site mixing when the grade won’t allow a full-size truck. On a steep wooded parcel off Empire Grade, our crew pulled a water-stained Therma-Tru Fiber-Classic entry whose bottom rail had rotted and whose lock no longer caught because the rough opening had racked on a slide-prone slope and the old sill had no pan flashing. We re-squared and re-framed the opening, set a new prehung slab with an OEM sill and ember-resistant sweep, flashed the threshold to shed water off the slope, and finished it to the county’s WUI detailing before the Santa Cruz County inspector signed off.
Therma-Tru Models & Products We Service in Bonny Doon
We work on the full residential Therma-Tru lineup: Fiber-Classic entry door series, Smooth-Star fiberglass entry and patio doors, Classic-Craft premium fiberglass doors, and Benchmark door-and-sidelite entry systems. For repairs we use Therma-Tru OEM replacement slabs, sills, sweeps, and weatherstrip wherever the frame is sound. Aftermarket seals rarely match the door’s engineered profile, and they fail early in this wet, shaded climate. When the rough opening is out of square, the sill is rotted, or the door sits in an unflashed wall, we tell owners honestly that a prehung replacement with a rebuilt, properly flashed threshold beats patching a failing slab. For full-scope projects, we also handle Therma-Tru sales & service as part of a larger remodel.
See the difference
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After
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After
Before
AfterTherma-Tru Service Pricing in Bonny Doon
| Service | Price Range |
|---|---|
| Full entry door replacement with re-framed, flashed opening | $4,500 – $15,000 |
| Full kitchen remodeling | $14,000 – $45,000 |
| Full bathroom remodeling | $9,000 – $28,000 |
| Roof replacement & installation | $8,000 – $20,000 |
| Metal roof installation | $15,000 – $40,000 |
What drives cost up here is rarely the door itself. It’s the re-framing when the opening has racked, the sill pan and flashing that should have been there in the first place, the WUI detailing the county inspector will look for, and the access work when a delivery truck can’t make the driveway. A free estimate from us covers site access, rough opening condition, and the full scope in writing before any work starts. Call (833) 756-5936 for an exact quote.
Serving Bonny Doon, CA — Our Local Coverage Area
We’re based in the Bonny Doon 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 Bonny Doon
Yes. Bonny Doon is unincorporated, so any replacement that alters the rough opening, adds a sidelite, or changes the exterior wall detail is permitted and inspected through Santa Cruz County, not a local city hall. We pull the permit and coordinate the inspections as part of the job. Call (833) 756-5936 for a free estimate.
Because the rough opening moved. Steep hillside lots in Bonny Doon settle and shift after heavy winter rain, which torques the frame; the slab binds, and the lock stops lining up. A correctly re-squared and re-framed opening fixes the symptom at the source instead of planing the door every spring. Call (833) 756-5936 and we’ll assess the opening before you touch the slab.
Usually, yes. We plan around Bonny Doon’s narrow private roads by scheduling pump trucks, short loads, or on-site mixing when a full-size delivery truck can’t make the grade. We’ll confirm access during the free estimate so pricing reflects delivery reality, not an assumption. Call (833) 756-5936.
It can, but only if the installation includes ember-resistant detailing: the right sweep, sill pan, flashing, and WUI-compliant sealing. We install Therma-Tru in Ben Lomond and throughout the county to meet Santa Cruz County WUI review requirements on fire-prone parcels, which a standard door swap often misses. Call (833) 756-5936 for an exact quote, before you order materials.
It depends on the frame and the wall. If the frame is square and sound, an OEM slab replacement with new sill and weatherstrip is often enough. If the bottom rail is rotted and the sill has no pan flashing, a prehung replacement with a rebuilt, properly flashed threshold is the honest fix. We’ll show you the numbers both ways. Call (833) 756-5936.
Service Areas Near Bonny Doon
Beyond Bonny Doon proper, we provide Therma-Tru construction service in neighboring Santa Cruz Mountain communities and the surrounding region, including Therma-Tru service in Communications Hill and Therma-Tru service in Brookdale. We also cover Bonny Doon service area and the broader 95060 ZIP code.
Book Your Therma-Tru Service in Bonny Doon Today
If your entry door is binding, leaking, or flagged by a WUI inspection, call (833) 756-5936. We’ll schedule a free estimate, assess the rough opening and access, and quote the job in writing before any work begins.
Written by Nolan Driscoll, Owner at Iron Beam Contractors, serving Bonny Doon and the Santa Cruz Mountains.