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Therma-Tru Construction in San Francisco, CA | Workshop Contractors
We provide independent Therma-Tru door installation, repair, and replacement across San Francisco, from Noe Valley to the Outer Sunset. The thing that separates our Therma-Tru work here from every other market we serve is this: San Francisco’s pre-1906 Victorians and Edwardians settle, rack, and hold fog-belt moisture in ways that turn a perfectly good fiberglass slab into a misbehaving door within a few years. We’re Therma-Tru sales & service specialists who understand the opening behind the door as much as the door itself. Call (844) 384-3361 for a free estimate.
Why San Francisco Residents Choose Us for Therma-Tru Service
We’ve been hanging, re-framing, and re-sealing Therma-Tru entry and patio doors on San Francisco’s Victorians and Edwardians for years. That means we know how Smooth-Star fiberglass slabs, Classic-Craft wood-grain finishes, and Fiber-Classic sliding doors behave when they’re installed on a hillside lot with a settling pier foundation, or on a north-facing entry that never sees direct sun. Noel Figueroa, our owner and general contractor, grew up around tradesmen who taught him that a door is only as good as the opening it hangs in. That lesson drives every San Francisco General Contractor Therma-Tru job we take.
We’re an independent general contractor, not authorized, sponsored, or endorsed by Therma-Tru. And honestly, that independence is why homeowners call us. We use Therma-Tru OEM replacement slabs, sweeps, sills, hinges, and multi-point hardware when the existing frame is sound, because Therma-Tru engineered those doors as a system. But when the jamb has rotted or the foundation under the threshold has shifted, we’ll tell you a full prehung replacement is the better use of your money. No upselling, no brand loyalty getting in the way of what the opening actually needs.
When you call Workshop Contractors for Therma-Tru work in San Francisco, you get one contractor accountable for the whole job. We measure the opening before ordering, we coordinate access through tight side yards and shared party-wall corridors, and we handle the permit paperwork when your project falls under San Francisco’s building code requirements. One contract. One schedule. One team.
Styles & brands we work with
Common Therma-Tru Construction Problems We Solve in San Francisco
- Blistering and peeling on fog-facing finishes. Wood-grain fiberglass slabs and painted surfaces on north- and west-facing San Francisco entries blister and peel from years of marine-layer condensation that never fully dries. The fog belt keeps those surfaces damp for months at a time, and the finish eventually gives up. We strip, prep, and refinish those slabs, or replace them entirely when the damage runs too deep.
- Threshold leaks from wind-driven rain. Factory sill and sweep seals on Therma-Tru doors degrade over time. On hillside and ocean-facing San Francisco homes, wind-driven Pacific rain gets wicked into the threshold, showing up as swelling and staining at the interior floor edge. We replace OEM sills and sweeps and re-flash the threshold so water drains away from the house.
- Racked frames from settling foundations. Unreinforced-brick and pier foundations under old San Francisco Victorians and Edwardians shift constantly. Frames rack out of square, slabs bind, hinge screws loosen, and multi-point locks stop engaging even though the door was plumb when it was installed. We re-square and shim frames, or order a prehung replacement when the racking has gone too far.
- Rot at the jamb leg and threshold. Painted wood-composite frames rot after decades of ground contact, especially on San Francisco stoops that drain toward the house instead of away from it. We replace rotted jamb legs, re-set thresholds on proper drainage slopes, and rehang the existing slab when it’s still sound.
- Multi-point hardware failures after remodels. When a San Francisco contractor re-trims a doorway or replaces flooring, they sometimes throw the door’s alignment off just enough that the multi-point lock stops engaging cleanly. We re-align the hardware and strike plates, then adjust the hinges so the lock throws on the first push.
Therma-Tru Service in San Francisco: What Local Conditions Mean for Your Door
Most San Francisco lots are built lot-line to lot-line with shared party walls. That means replacing an entry or rear Therma-Tru door almost always involves coordinating access and protection through a neighbor’s side yard or rear yard. On a recent Noe Valley Edwardian, we were called out for Therma-Tru service in Noe Valley when a Smooth-Star front door wouldn’t latch. Pulling the interior trim showed the slab had been hung true, but the pier-and-beam foundation under the stoop had settled, racking the jamb and letting fog-belt moisture wick into the sill. We re-squared and shimmed the frame, replaced the rotted jamb leg and OEM sill and sweep, re-flashed the threshold so it drained away from the house, and rehung the existing slab with new hinges. The door now latches on the first push. That sequencing problem, the neighbor coordination, the foundation movement behind a door that was hung correctly, is a San Francisco pattern. You don’t see it in Fremont or San Mateo. Here, every exterior door job on an old row house carries that hidden complexity.
Build it right the first time. The second time costs twice as much and nobody’s happy about it.
Therma-Tru Models & Products We Service in San Francisco
We service the full Therma-Tru residential lineup. That includes the Smooth-Star fiberglass entry door, the Classic-Craft American Style collection with its wood-grain finish, the Fiber-Classic door, and the Fiber-Classic sliding patio door. We source OEM replacement slabs, sweeps, sills, hinges, and multi-point hardware directly through our supplier network, which means we can often have common San Francisco parts on a job site within days rather than weeks. When the existing frame is still square and solid, we repair in place. When the frame has rotted or the opening has racked beyond shimming, we order a prehung unit and measure the opening twice before we order. We’re a general contractor, so we also handle the structural work around the door: reframing rough openings, repairing rotted rim joists, and re-flashing thresholds on hillside homes where water runs toward the entry, including Therma-Tru in Mission District properties.
See the difference
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AfterTherma-Tru Service Pricing in San Francisco
Every Therma-Tru job in San Francisco is priced against the actual opening, not a catalog. A simple sweep and hinge adjustment runs far less than a full prehung replacement on a racked Edwardian jamb. These are the ranges we see most often across San Francisco for the projects that include Therma-Tru door work.
| Project | Typical Range |
|---|---|
| Window Replacement | $5,310 – $17,700 |
| Impact Window Installation | $9,440 – $29,500 |
| Bathroom Remodel | $10,620 – $33,040 |
| Kitchen Remodel | $16,520 – $53,100 |
What drives the cost on a San Francisco Therma-Tru job more than anything is what’s behind the door. A solid opening with a settle-free threshold is a straightforward slab or hardware replacement. A racked jamb on a pier foundation, a rotted sill that’s been wicking fog-belt moisture for years, or a lot-line access problem that requires neighbor coordination adds labor and sometimes a structural fix. That’s why we don’t quote Therma-Tru work over the phone. Call (844) 384-3361 and we’ll send someone out to measure, inspect, and give you a written, line-item estimate. Free.
Serving San Francisco, CA — Our Local Coverage Area
We’re based in the San Francisco 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 Francisco
The opening. Bernal Heights homes sit on hillside foundations that move with seasonal moisture, and when the ground expands and contracts, the jamb racks and the slab binds. The door itself is usually fine. We diagnose by checking slab-to-jamb clearances top, middle, and bottom; if the gaps are uneven, the frame has moved. We shim, re-square, and sometimes re-anchor the jamb, then the door swings free. Call (844) 384-3361 for an inspection.
Replacing a door in the same opening with the same size opening generally doesn’t require a permit in San Francisco. But if you’re widening the rough opening, altering the exterior wall assembly, or your home is listed or in a historic district with specific facade review requirements, you may need one. We handle the paperwork when a permit is required, and we’ll tell you on the estimate whether yours crosses that line.
San Francisco’s marine layer keeps north- and west-facing surfaces damp for months at a time. Fiberglass doesn’t rot, but the factory finish can blister and peel when it never fully dries. We strip the failing finish, prep the surface properly, and refinish with a coating system that handles constant moisture for Visitacion Valley Therma-Tru service and throughout the city. In some cases the slab is too far gone and we replace it.
Almost always yes. We’ve maneuvered full fiberglass slabs through San Francisco side yards narrower than a shoulder-width. We sometimes remove the slab from its factory packaging, protect the edges, and walk it through on edge with two or three people. If we’re replacing a frame too, we break the old unit down and carry it out in pieces.
When flooring or trim work shifts the door’s alignment by even a fraction, the multi-point rod and strike plate alignment goes out. The lock mechanism is usually fine; the opening has changed around it. We re-align the hardware, adjust the hinges, and sometimes re-shim the frame so the lock throws cleanly again. Call (844) 384-3361 and we’ll sort it out.
Service Areas Near San Francisco
We serve all of San Francisco service area including Noe Valley, Bernal Heights, the Outer Sunset, and Chinatown. See our Therma-Tru service in Chinatown page for details on that neighborhood. We also handle door and remodeling work across the bay for homeowners who need Therma-Tru service in Tiburon.
Book Your Therma-Tru Service in San Francisco Today
If your Therma-Tru door is sticking, leaking, or not latching, call (844) 384-3361 today. We’ll schedule a free estimate, inspect the opening, and tell you exactly what needs fixing and what it will cost. Written quotes, no surprises.
Written by Noel Figueroa, Owner at Workshop Contractors, serving San Francisco and the surrounding Bay Area.