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Therma-Tru Construction in San Mateo, CA | Workshop Contractors
We provide independent Therma-Tru sales & service across San Mateo, from slab swaps on 1950s ranch homes to full prehung replacements on newer builds. The thing that sets our Therma-Tru work apart here is that we diagnose the whole opening, not just the door slab. San Mateo’s flat-roof mid-century tracts trap moisture at the header, so a sticking Therma-Tru is often a wall problem wearing a door’s clothes. Call (844) 384-3361 for a free estimate.
Why San Mateo Residents Choose Us for Therma-Tru Service
We’ve replaced and rehung hundreds of Therma-Tru entry, patio, and interior doors on the Peninsula, and we know which series hold up to marine air and which sills quietly rot behind a good-looking slab. We work independent of Therma-Tru. We buy and install their doors because they fit this housing stock, not because anyone authorized us to. Noel Figueroa, our owner and general contractor, learned framing from the same generation of Inland Empire tradesmen who built half the houses on his street in Ontario, and he brings that same second-look finish standard to every door opening we touch in San Mateo. We carry Therma-Tru OEM slabs, sills, sweeps, and multipoint hardware, and we know what’s stocked locally for fast turnaround across the 94401, 94402, 94404, and 94497 ZIP codes.
Styles & brands we work with
Common Therma-Tru Construction Problems We Solve in San Mateo
- Marine-layer moisture wicking into the sill and bottom rail. West- and north-facing entries in San Mateo take the brunt of the fog line, and we regularly find the slab edge softened long before the finish shows any wear. The fix is an OEM sill and a positive-drain sweep, and we check the rough opening for trapped moisture while we’re in there.
- UV chalking and paint breakdown on south- and west-facing fiberglass skins. A Therma-Tru Smooth-Star on a full-sun San Mateo wall without a deep eave will chalk and fade faster than the same door under a porch roof. We refinish and reseal, or rehang a new prehung unit when the skin is past saving.
- Out-of-square doors on 1950s – 60s ranch and Eichler homes. The shallow slab-on-grade foundations and low-slope roof assemblies settle differently over decades, so latches drag and weatherseal gaps open at the top corner. We re-square the opening and reset the jamb, or set a new prehung door when the frame is too far gone.
- Threshold and weatherstrip failure after wet winters. Many San Mateo flat-roof houses have no stoop overhang, so wind-driven rain sweeps straight at the door bottom. The original sweep hardens and cracks within a season or two. We install OEM sweeps and thresholds matched to the specific Therma-Tru series.
- Sticking doors after the rainy season. This is the San Mateo classic, and it’s usually not the door. More on that below.
Therma-Tru Service in San Mateo: What Local Conditions Mean for Your Equipment
San Mateo’s flat- and low-slope-roof mid-century tracts were often built with little or no attic ventilation, so the recurring entry-door call here is a door that swells and sticks after a wet winter because moisture is trapped at the wall and header above it. This condition sends us to the roof and wall assembly before we ever touch the hinges. On a low-slope Eichler-style ranch off the Highlands-Baywood Park Therma-Tru service area, our crew was called out for a front Therma-Tru Fiber-Classic that wouldn’t latch after the first big rain. Pulling the interior trim showed the header and rough opening had taken on moisture from an unvented roof deck above, so we dried and repaired the framing, flashed the opening correctly, and set a new prehung Fiber-Classic with an OEM sill and a positive-drain sweep before closing it back up. The door was fine. The wall around it wasn’t, which is the pattern we see all over this side of the city. 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 Mateo
We work on the full Therma-Tru lineup homeowners actually have in San Mateo: the Fiber-Classic entry door, the Smooth-Star fiberglass door, the Classic-Craft American Style collection, and Therma-Tru patio and hinged glass door units. For parts, we use OEM slabs, sills, sweeps, and multipoint hardware wherever the frame is sound, because mismatched aftermarket sweeps and strikes are the main cause of premature weatherseal failure. When a slab or bottom rail is already soft, we tell owners honestly that a new prehung unit beats patching. On San Mateo’s wet-winter exposure, a repaired rail tends to fail again within a season or two.
See the difference
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AfterTherma-Tru Service Pricing in San Mateo
Door work on a San Mateo home usually pulls in related trades, and pricing reflects the scope that actually needs doing. Here’s what you’re likely looking at for the three services we most often pair with Therma-Tru projects in this area:
| Service | Typical Range |
|---|---|
| Roof Repair | $400 – $1,800 |
| Window Replacement | $4,500 – $15,000 |
| Home Addition | $45,000 – $130,000 |
A straight slab swap on a sound frame costs far less than a full prehung replacement with framing repair. Your free estimate includes a look at the rough opening, the flashing above, and the sweep below, because that’s what determines the real number. Call (844) 384-3361 to schedule yours.
Serving San Mateo, CA — Our Local Coverage Area
We’re based in the San Mateo 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 Mateo
Yes, when the jamb and frame are square and sound we can hang a new OEM Therma-Tru slab into the existing opening, keeping your original trim and interior finish. If the frame has moved or the sill is soft, a new prehung unit is the honest fix. We’ll show you the condition before we recommend either path. Call (844) 384-3361 and we’ll take a look.
In San Mateo it’s usually the house. The flat-roof mid-century tracts here have little or no attic ventilation, so moisture gets trapped at the header above the door and the opening swells. We check the wall and roof assembly above the door before we touch the hinges, because adjusting a door on a wet opening just moves the problem around. Call (844) 384-3361 for a diagnosis.
In most San Mateo cases, a direct door replacement in an existing opening does not require a permit, but if we’re altering framing, widening the rough opening, or doing work that touches the pre-1960 abatement rules, permits and inspections come into play. We pull permits when the scope requires them, and we handle the paperwork so you don’t have to think about it.
Yes, Therma-Tru’s fiberglass skins hold up well to San Mateo’s marine air compared to wood, but the sill and weatherseal are the weak points. We spec OEM sills and sweeps with positive drainage and check the flashing above the opening, because the failure we see most often on fog-side exposures is moisture wicking up from the bottom, not skin damage. Call (844) 384-3361 if you want us to check yours before winter.
An ADU in San Mateo changes the door conversation because the new unit sits in a rear or side yard on a narrow Peninsula lot, often without a stoop overhang, and it takes the same wind-driven rain as the main house. We spec the Therma-Tru series and sill based on that exposure, and we coordinate the door package with the ADU’s overall envelope so the waterproofing works as one system. Since we also build ADUs in Foster City Therma-Tru service areas and beyond through partnerships with Abodu, Dvele, Mighty Buildings, Boxabl, and Plant Prefab, the door order, framing, and flashing stay under one contract. Call (844) 384-3361 to talk through your ADU plans.
Service Areas Near San Mateo
Our Therma-Tru crews cover San Mateo and the surrounding Peninsula communities. We also provide Therma-Tru service in Burlingame for homeowners on the north side, and Therma-Tru service in Hillsborough for the larger estates up the hill. If you’re unsure whether your address falls in our San Mateo service area, call us and we’ll confirm.
Book Your Therma-Tru Service in San Mateo Today
If your Belmont Therma-Tru service area door is sticking, dragging, or letting water past the sweep, call (844) 384-3361. We’ll diagnose the opening, quote the fix in writing, and schedule the work without making you manage a parade of subcontractors. One contractor. Every trade.
Written by Noel Figueroa, Owner at Workshop Contractors, serving San Mateo since day one.