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Therma-Tru Construction in Tiburon, CA | Workshop Contractors
We provide independent Home Remodeling in Tiburon with a focus on Therma-Tru entry door installation, re-hanging, and weather-sealing for hillside and split-level homes. The one thing that separates our Therma-Tru work here is this: we don’t just swap doors, we reconcile them against Tiburon’s grading and drainage ordinances, because on a 20%-plus slope lot a door that isn’t set to the approved drainage grade will fail at the threshold within two wet seasons. If your Therma-Tru entry door is dragging, fogging, or leaking in the 94920 ZIP, call Workshop Contractors at (844) 384-3361 for a free estimate. We’re a full general contractor, so when the door work uncovers a framing or flashing problem, the same team fixes it – no handoff, no separate sub.
Why Tiburon Residents Choose Us for Therma-Tru Service
We’ve hung, re-hung, and weather-sealed Therma-Tru fiberglass and steel doors on sloped Tiburon lots for years, so we know how these doors actually behave in fog-belt damp and hillside settlement, not just how they look in a showroom. When a Therma-Tru door fails in Tiburon, it’s rarely the fiberglass slab. It’s the opening around it: the racked rough frame, the rotted sub-sill, the flashing that nobody re-tied when the stucco got patched. Noel Figueroa, our owner and Tiburon General Contractor, started swinging a framing hammer on job sites before he was old enough to rent a truck, and he runs every crew the same way: build the opening square first, then the door seals, latches, and holds. Build it right the first time. The second time costs twice as much and nobody’s happy about it.
We are an independent contractor, not a Therma-Tru authorized dealer or subsidiary. That independence matters because it means we recommend the repair that will hold, not the replacement that pads an invoice. We’ve had a client in Tiburon insist on a full entry replacement when the only real problem was a sub-sill that had rotted behind the sweep – we fixed the sill, re-flashed the threshold, and reset the same sound slab for a fraction of the cost. That’s the job we’d want done on our own house.
For homeowners planning a larger scope, we’re a single-source general contractor with vetted partnerships across 50+ manufacturers spanning roofing (GAF, CertainTeed, Owens Corning), windows and doors (PGT, CGI, Therma-Tru), James Hardie siding, and full interior remodeling. So if a Tiburon entry door project turns into a threshold drainage fix that turns into exterior siding replacement, one contract covers it all. We also provide Therma-Tru sales & service across related door and exterior assemblies.
Styles & brands we work with
Common Therma-Tru Construction Problems We Solve in Tiburon
- Rotted sub-sill and failed perimeter weatherseal. Bay-driven fog and winter rain wick into the sill and threshold. The fiberglass slab stays sound, but the wood sub-sill underneath rots and the door stops sealing. In Tiburon, where the wet season dumps rain on west-facing entries for months, this is the most common call we get.
- Door dragging on the strike jamb after hillside settlement. Hillside and split-level settling racks rough openings out of square. A Therma-Tru prehung slab starts dragging on the strike jamb, and the sweep no longer meets the threshold evenly. The slab looks fine, but the opening isn’t. We shim, square, and re-hang before we talk replacement.
- Fogged sidelite and door glass on 1970s-80s contemporaries. Original Therma-Tru sidelites and door glass from that era often have sealant that finally fails, and the coastal UV fades south- and west-facing finishes faster than inland. The result is fog between the panes and a finish that looks tired in the Tiburon sun.
- Flashing gaps around a reused Therma-Tru frame on tear-down/replace jobs. When the new stucco and drainage detailing go in around a reused frame, gaps and flashing errors pond water right against the threshold. It looks fine until the first big storm, and then the water has been working for months.
- Threshold set against the wrong drainage grade. On Tiburon’s sloped lots, a door landing that drains toward the house instead of away will overwhelm even a perfect Therma-Tru sweep. The door itself isn’t the problem – the grade is.
Therma-Tru Service in Tiburon: What Local Conditions Mean for Your Equipment
Here’s the thing most generic door companies don’t understand about Tiburon: the town’s design review and hillside ordinances frequently require retaining walls and drainage plans to be approved before any foundation pour. A new or replaced entry door sits right in that drainage path on a 20%-plus slope lot, which means the door’s sill height, threshold flashing, and landing elevation have to be settled against the approved grading plan, not chosen at the end of the job. We saw this play out on a split-level rancher off the Old St. Hilary’s slope side of town, where our crew pulled a Therma-Tru Fiber-Classic entry that had been dragging for years. The rough opening had racked as the hillside pad settled, and winter rain had rotted the sub-sill behind the sweep. We squared and shimmed the jamb, replaced the OEM sill and weatherstrip, re-flashed the threshold to the approved drainage grade, and reset the slab so it latched clean through the wet season. That sequence – opening first, grade second, door last – is the only order that works in Tiburon, and it’s the order we’ve used on every hillside door job since.
Therma-Tru Models & Products We Service in Tiburon
We install and service the full Therma-Tru line that shows up in Tiburon homes: Smooth-Star fiberglass entry doors, Fiber-Classic entry doors, Classic-Craft door series, and patio and sidelite assemblies with factory glazing. We default to OEM Therma-Tru slabs, sills, sweeps, and weatherstrip so the door keeps its warranty profile and seals correctly, and we only use quality aftermarket hardware where OEM is unavailable or honestly cost-prohibitive. We’ll re-hang and re-seal a sound fiberglass door before we recommend replacing it. A full slab-and-frame replacement only makes sense when the panel or jamb is genuinely failing – and on the fog-belt side of Tiburon, that’s often later than people assume, because fiberglass doesn’t rot.
Our full-service coverage for Tiburon service area also extends to the surrounding work these doors touch: full bathroom remodeling, window replacement, and roof repair, because a leaking threshold is often connected to a failing roof edge or a window flashing detail.
See the difference
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AfterTherma-Tru Service Pricing in Tiburon
Pricing for the work that typically surrounds a Therma-Tru door service in Tiburon:
| Service | Price Range |
|---|---|
| Window Replacement | $4,500 – $15,000 |
| Bathroom Remodel | $9,000 – $28,000 |
| Roof Repair | $400 – $1,800 |
What drives the cost on a Tiburon door job is the opening, not the door. If the rough frame is racked from hillside settlement, we have to square and shim it before the Therma-Tru slab goes back in. If the sub-sill is rotted, that’s framing and flashing work. If the threshold is set against the wrong drainage grade, the landing may need re-grading. A free estimate includes a look at all of that – the door, the opening, the sill, and the grade – so you get a line-item price, not a vague guess. Call (844) 384-3361 to schedule yours.
Serving Tiburon, CA — Our Local Coverage Area
We’re based in the Tiburon 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 Tiburon
Yes, but we won’t set the threshold height or landing until the approved grading plan is in hand, because the door’s sill and flashing have to follow the drainage path the town has already signed off on. We can do the rough framing, square the opening, and hang the slab on temporary shims while review runs its course, then make final adjustments once the grade is confirmed. Call (844) 384-3361 and we’ll walk your specific review timeline before quoting.
On Tiburon hillside and split-level lots, the rough opening almost always racks as the pad settles. The fiberglass slab is still square, but the frame isn’t, so the door drags on the strike jamb and the sweep no longer meets the threshold evenly. We re-hang the slab by squaring and shimming the jamb, and in most cases the same door works again. Call (844) 384-3361 for a free assessment.
Yes, in one specific way: the fog and winter rain wick into the wood sub-sill and perimeter weatherseal under the fiberglass, so the slab stays sound but the parts underneath rot. Inland Marin gets colder dry spells; Tiburon gets months of damp that keep working on the sill. That’s why we check and replace the sub-sill on every Tiburon door service, even when the door itself is fine.
We are an independent contractor. We are not authorized, sponsored, or endorsed by Therma-Tru, and we don’t claim otherwise. What we are is experienced with Therma-Tru products in Tiburon’s specific conditions, and we use OEM slabs, sills, sweeps, and weatherstrip by default so the door keeps its warranty profile.
Yes. We’ve worked with Tiburon’s design review process enough to know that trim detailing and door proportions matter, especially on mid-century ranchers and contemporaries where the original entry had a specific scale. We’ll match the Therma-Tru slab and sidelites to the existing opening and trim profile, and we’ll document the choice so the review package is clean. Call (844) 384-3361 to talk through the specifics of your door.
Service Areas Near Tiburon
Workshop Contractors serves Tiburon and the surrounding Marin communities. We also provide Therma-Tru service in Belvedere and Therma-Tru service in Sausalito, both of which share the bay-fog exposure and hillside lot conditions that shape how Therma-Tru doors perform. If you’re planning a larger remodel on a sloped lot, ask about our full general contracting scope.
Book Your Therma-Tru Service in Tiburon Today
If your Therma-Tru door is dragging, fogging, or leaking on a Tiburon hillside, don’t wait through another wet season. Call Workshop Contractors at (844) 384-3361 to schedule your free estimate. We’ll look at the door, the opening, the sill, and the drainage grade, and tell you what actually needs fixing.
Written by Noel Figueroa, Owner & General Contractor at Workshop Contractors, serving Tiburon and the broader Marin County area.