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Therma-Tru Construction in Las Lomas, CA | Daly City Construction
We provide independent Therma-Tru door installation, repair, and replacement across Las Lomas, CA. What sets our work apart here is straightforward: most Therma-Tru doors in this unincorporated Pajaro Valley community fail not because of the fiberglass slab, but because of the old, moisture-compromised framing they’re set into. If you need Pajaro Therma-Tru service nearby, the same framing issues apply. We’re Daly City Construction, and we fix the opening first, then hang the door right. Call (866) 505-5254 for a free estimate.

Why Las Lomas Residents Choose Us for Therma-Tru Service
Las Lomas isn’t a tract-home suburb. The housing stock runs to older farmhouses, owner-built rural structures, and accessory buildings on larger parcels. When we pull a Therma-Tru prehung unit out of a doorway here, we know what we’re likely to find: settled legacy framing, rot at the jamb bottoms from decades of Pajaro Valley damp, and flashing that was never right in the first place. Noel Cabrera, our owner, grew up around this kind of construction in the Westlake district of Daly City, where postwar tract homes taught him early that the framing matters more than the finish. He trained in construction technology at City College of San Francisco and spent years on residential and light commercial jobs across San Mateo and San Francisco counties. That background is why we approach every Therma-Tru sales & service job here as a structural project first, a door project second.
We stock Therma-Tru OEM sills, hinges, and weatherstrip so we don’t lose days waiting on parts when a Las Lomas door needs attention. And because we handle full-scope general contracting, we can address the framing, flashing, roofing, and window issues that often surround a failed exterior door, all under one license and one point of contact.
Styles & brands we work with







Common Therma-Tru Construction Problems We Solve in Las Lomas
- Sill and threshold rot from fog-heavy winters. Therma-Tru fiberglass slabs hold up beautifully in coastal air, but the wood or composite sill and the bottom of the jamb legs wick moisture when a door sits at grade. In Las Lomas, morning fog and winter rain mean we replace far more sills and jamb bottoms than door slabs. The door outlives its sill here, and that’s the problem.
- Delamination and finish failure at the bottom rail. Older Fiber-Classic and Classic-Craft doors with factory finishes that were never maintained will stain, peel, and eventually delaminate after years of damp exposure. In Las Lomas, south-facing doors get hit with sun, fog, and rain in rotation, and the bottom rail takes the worst of it.
- Bowing and racking in settled owner-built openings. Many Las Lomas homes predate current code, and the rough openings have moved over decades. A Therma-Tru prehung door set into a settled, out-of-square opening will drag, bind, and lose its weatherstrip seal, letting wind-driven rain past the perimeter. We see this constantly on older farm-lot properties.
- Worn multi-point hardware on heavy Classic-Craft doors. Therma-Tru Classic-Craft entry doors are substantial, and their multi-point hardware takes a beating over time. Worn hinges and misaligned locking points throw the slab out of square and break the seal at the head and strike side. This is especially common on shops and outbuildings where doors get hard daily use.
- Fog-season drafts from failed perimeter seals. When the weatherstrip degrades or the door racking breaks the seal, Las Lomas homeowners notice it first as a cold draft in the damp months. The door looks fine, but the perimeter is leaking. That’s a fixable problem, often without replacing the slab.
Therma-Tru Service in Las Lomas: What Local Conditions Mean for Your Equipment
Here’s what most people don’t realize about Therma-Tru work in Las Lomas specifically: because most of the housing here predates current code and sits on rural parcels with moisture-prone soils near the Pajaro River, exterior door openings often need the rough framing and flashing brought up to standard before a new Therma-Tru prehung unit will seal. The door install is the last step, not the first. On a fog-heavy farm-lot property off the rural lanes of Las Lomas, our crew was called for a Therma-Tru Fiber-Classic entry door that had started dragging and leaking at the corner. Similar conditions affect homes needing Therma-Tru repair in Corralitos. We pulled the unit, found the original 2x jamb framing had rotted at grade from years of Pajaro Valley damp, rebuilt and flashed the rough opening, and set a new Therma-Tru prehung door with a composite sill so the slab could shed water properly. The homeowner’s fog-season draft disappeared. That sequence, fixing the opening before hanging the door, is the difference between a door that performs for twenty years and one that fails again in five.
Therma-Tru Models & Products We Service in Las Lomas
We install and repair the full Therma-Tru lineup, including Smooth-Star fiberglass entry doors, the Fiber-Classic collection, Classic-Craft door series, and patio and French door systems with Tru-Defense frames. Our parts approach is simple: we use Therma-Tru OEM sills, hinges, and weatherstrip on doors worth keeping, and we match quality aftermarket hardware only where OEM isn’t practical for a retrofit into old Las Lomas framing. A sound fiberglass slab usually deserves a sill and jamb repair rather than a new door. A delaminated or bowed slab on a settled opening is often better replaced than patched. We’ll tell you which way to go, and why, based on what we find when we open up the opening.
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AfterTherma-Tru Service Pricing in Las Lomas
Therma-Tru door work in Las Lomas varies depending on whether the opening needs structural attention before the door goes in. Here are the two service ranges we’re most often asked about on door-related projects, calibrated to this market:
| Service | Price Range |
|---|---|
| Window Replacement (often needed alongside door retrofits) | $4500 – $15000 |
| Roof Repair (flashing and drip-edge work above door openings) | $400 – $1800 |
What drives cost on a Therma-Tru job in Las Lomas is what we find behind the door: rotted jamb legs, settled headers, missing flashing, or damaged sheathing. Our free estimate includes pulling the interior trim to inspect the rough opening, not just eyeballing the slab. Call (866) 505-5254 and we’ll give you a written, line-item quote.
Serving Las Lomas, CA — Our Local Coverage Area
We’re based in the Las Lomas 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 Las Lomas
Rarely, no. Most owner-built openings in Las Lomas have settled, twisted, or were never square to begin with. A Therma-Tru prehung unit demands a square, properly flashed rough opening to seal correctly. We rebuild and true up the opening first, then set the door. Call (866) 505-5254 and we’ll inspect your specific opening.
Your sill or jamb legs are almost certainly wicking moisture from Las Lomas fog and rain. The fiberglass slab may be perfect while the wood or composite sill underneath is rotted or cracked. We replace the sill system, rebuild the jamb bottoms if needed, and reseal the threshold. Call (866) 505-5254 for a free estimate.
Yes, with one caveat: the opening matters more than the door. Outbuildings on Las Lomas rural parcels often have rough framing that’s been exposed to Pajaro Valley moisture for years, just as we see with Amesti Therma-Tru service calls. A Therma-Tru fiberglass slab with a composite sill works well in those conditions, but only if the rough opening is rebuilt and flashed correctly first. We handle that work in-house.
In most cases, yes. Therma-Tru’s door families share consistent rough opening dimensions, so we can order a replacement slab or a new prehung unit in the same size and re-set it without reframing. If the existing opening has moved or rotted, we’ll address that before the new door goes in. We’ll walk you through the options before any work starts.
We handle all of it. Door leaks in Las Lomas often trace back to failed flashing above the opening or damaged drip-edge under the roofline. We replace the door, repair the roof flashing, and swap any windows in the same work scope as one contractor. Call (866) 505-5254 and we’ll scope the whole project.
Service Areas Near Las Lomas
We serve Las Lomas and the surrounding communities, including Las Lomas service area coverage along the Pajaro Valley corridor, Therma-Tru service in Aromas for rural parcels to the north, Therma-Tru service in Elkhorn for properties closer to the coast, plus Watsonville and the wider Santa Cruz County area.
Book Your Therma-Tru Service in Las Lomas Today
If your Therma-Tru door is dragging, leaking, or letting fog-season drafts through, we’ll find out why and fix it at the source. Call (866) 505-5254 to schedule a free estimate in Las Lomas. We’ll inspect the opening, give you a straight answer, and handle the whole job, framing to final hardware.
Written by Noel Cabrera, Owner at Daly City Construction, serving Las Lomas and the Pajaro Valley.