Kitchen remodeling
Bathroom remodeling
Home additions & ADU
Roofing
Windows & doors
Driveway & pavers
FenceFree written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Therma-Tru Construction in Half Moon Bay, CA | Daly City Construction
We provide independent Therma-Tru service across Half Moon Bay and Therma-Tru in Hillsborough, from entry door replacement to sidelight repair and full door system installation. The one thing that makes our Therma-Tru work here different is that we actually understand how salt fog and persistent marine damp attack these doors on the west side of town. We’re not authorized or sponsored by Therma-Tru, but we work on their doors every week and source directly from the brand’s parts channels. Call (866) 505-5254 for a free estimate on any Therma-Tru project in Half Moon Bay.
Why Half Moon Bay Residents Choose Us for Therma-Tru Service
Most door contractors in Half Moon Bay know how to hang a door. Fewer know how a Therma-Tru Smooth-Star fiberglass skin behaves after five winters of salt-laden onshore wind. We do. Noel Cabrera, owner of Daly City Construction, grew up on the coast side of San Mateo County and trained at City College of San Francisco before putting in years on residential and light commercial jobs across the county. He’s seen what fog-belt humidity does to door systems, and he’ll tell you straight: “Tell me what the house needs, not what you think it needs – then we’ll figure out the right fix.”
We carry OEM Therma-Tru replacement parts including weatherseal, sweeps, hinges, glass, and sill components. When a slab and frame are sound, we repair with factory parts rather than aftermarket substitutes that fail in salt air. When a fiberglass skin is delaminated or a steel slab has rusted through at the bottom rail, we say so plainly and recommend replacement. That honesty matters when you’re deciding whether to patch a door or install a new one on a bay-facing wall in Half Moon Bay.
Styles & brands we work with
Common Therma-Tru Construction Problems We Solve in Half Moon Bay
- Salt-spray delamination on Smooth-Star fiberglass doors. On west-side homes, prevailing onshore winds drive salt spray into door-bottom corners and sidelight joints. The moisture wicks under the paint film and separates the fiberglass skin from the core, starting at the bay side and working inward. We see this regularly in Alsace Loraine and Ocean Colony.
- Hinge-side jamb rot on Classic-Craft wood-stile doors. Fog-belt humidity saturates wood stiles, hinge-side jambs, and brickmold on Classic-Craft American Style units. Screws lose their grip, the door sags out of square, and the edges start binding against the frame.
- Interior rust-through on steel-skinned Fiber-Classic doors. The cool marine air that sits against a west-facing door slab causes condensation on the interior side. That moisture settles at the slab edge and bottom rail, and the steel rusts from the inside out. By the time you see rust bleeding through the paint, the bottom rail is usually compromised.
- Threshold and weatherseal failure from wind-driven rain. Worn sweeps and degraded weatherseal let wind-driven rain pool at the sill. The aluminum or wood threshold rots, the subfloor wicks moisture, and the carpet tack strip disintegrates. We trace this pattern over and over in older harbor-area homes.
- Sidelight sill rot and glass seal failure. Sidelight assemblies on bay-facing walls take the same salt spray as the door slab, but the sills are often the first to fail. Once the sill rots, water works its way into the rough opening and starts damaging framing.
Therma-Tru Service in Half Moon Bay: What Local Conditions Mean for Your Equipment
On Half Moon Bay’s west side, the marine layer can sit for days at a time. That’s not an exaggeration, and it’s not something a contractor from Redwood City or San Carlos deals with regularly. The fog here doesn’t just pass through in the morning; it parks over neighborhoods like Alsace Loraine and Ocean Colony and keeps everything damp. Therma-Tru doors on bay-facing walls face near-constant wetting, so door bottoms and sidelight joints corrode and delaminate years before the same units on the east side of town show any wear at all. We’ve pulled doors in Alsace Loraine where the fiberglass skin had separated from the core along the bottom rail and the sidelight sill had rotted through from salt spray driven in by the onshore wind. The fix wasn’t a patch. We replaced the rotted sill and framing, reset a new OEM-spec door slab and sidelight with upgraded weatherseal and a corrosion-resistant threshold, and re-flashed the opening so wind-driven rain sheds away from the wall. That’s what Half Moon Bay construction actually requires: detailing for persistent damp and salt, from flashing to fasteners. If your door installer doesn’t know the difference between a west-side installation and an inland one, you’re paying for a door that will fail early.
Therma-Tru Models & Products We Service in Half Moon Bay
We install and service the Therma-Tru product families that dominate coastal California homes: Smooth-Star fiberglass entry doors, Classic-Craft American Style collection doors, Fiber-Classic steel entry systems, and Therma-Tru patio and French door systems with Simulated Divided Lite (SDL) glass. For fast turnaround in Half Moon Bay, we keep OEM replacement sweeps, weatherseal, and hinge sets on hand, and we order replacement glass and sill components directly from Therma-Tru’s parts channels when a slab is worth saving. If a door slab is beyond repair, we spec a new unit that matches the existing rough opening and the home’s architectural style.
See the difference
Before
After
Before
After
Before
AfterTherma-Tru Service Pricing in Half Moon Bay
What you’ll pay depends on whether we’re repairing an existing door, replacing a slab, or building out a full entry system with sidelights. Here’s what the broader project ranges look like when Therma-Tru door work is part of a larger Half Moon Bay construction scope:
| Project Type | Price Range |
|---|---|
| Window Replacement | $4,500 – $15,000 |
| Home Addition | $45,000 – $130,000 |
| ADU Construction | $90,000 – $220,000 |
A free estimate includes an on-site look at the existing door, an honest assessment of whether repair or replacement makes sense for the specific failure you’re seeing, and a written line-item quote. No vague ballpark. Call (866) 505-5254 to schedule yours.
Serving Half Moon Bay, CA — Our Local Coverage Area
We’re based in the Half Moon Bay area and know this community well, with coverage that extends to Therma-Tru in Moss Beach and surrounding coastal towns. Use the map below to see our full service coverage — if you’re nearby, we can almost certainly help.
FAQs – Therma-Tru Construction in Half Moon Bay
The persistent fog and salt-laden humidity on the coast keep wood stiles, hinge-side jambs, and brickmold saturated for weeks at a time. When wood components absorb that moisture, they swell and the screws lose their bite, so the door sags and starts binding. Inland homes don’t get that sustained wetting cycle. If your door sticks seasonally in Half Moon Bay, the fix usually involves replacing the affected wood components and upgrading the weatherseal. Call (866) 505-5254 and we’ll diagnose it on site.
That bubble is almost always delamination: salt spray has worked under the paint film and separated the fiberglass skin from the core. By the time it’s visible, the bond is failing over a larger area than what you can see. Patching it won’t hold up to salt air. We’ll pull the door, inspect the slab, and if the delamination is confined to the skin, we’ll spec a new slab. If the core is compromised too, you’re looking at a full replacement. We’ll tell you which one you actually need when we see it.
Yes. We do this regularly as part of larger Half Moon Bay projects. When we build a home addition or an ADU in the harbor area, we can spec a Therma-Tru entry system with sidelights to match the main house, and we detail the installation for salt air from day one: corrosion-resistant thresholds, upgraded weatherseal, and flashing that sheds wind-driven rain away from the opening. The same approach applies to our El Granada Therma-Tru service. You don’t have to choose between a prefab ADU partner brand like Abodu or Dvele and a quality Therma-Tru entry. One contractor handles all of it.
Not necessarily, but it needs to be detailed correctly. Steel-skinned Fiber-Classic doors fail in Half Moon Bay when interior condensation from cool marine air sits against the slab edge and bottom rail, rusting the steel from the inside out. If you’re on a bay-facing wall in Alsace Loraine or Ocean Colony, we’ll often recommend a fiberglass slab instead, or we’ll spec a steel door with a factory-applied corrosion-resistant coating and make sure the bottom rail is sealed before installation. The door itself isn’t the problem; the installation details are.
Genuine Therma-Tru parts, every time the slab and frame are sound. Aftermarket seals and hinges rarely hold up to sustained salt fog, and we’ve seen too many “repaired” doors fail within two years because someone saved forty dollars on a cheap sweep. We order OEM replacement glass, sweeps, weatherseal, hinges, and sill components directly from the brand’s parts channels. When the slab is delaminated or rusted through, no part is going to fix it, and we’ll tell you that plainly. Call (866) 505-5254 for an exact quote.
Service Areas Near Half Moon Bay
We serve Half Moon Bay service area and the surrounding San Mateo County communities, including Daly City, Broadmoor, Colma, Brisbane, and the neighborhoods around Visitacion Valley. If you’re just over the hill, we also provide dedicated Therma-Tru service in San Carlos and Therma-Tru service in Redwood City. For full brand coverage, see our Therma-Tru sales & service page.
Book Your Therma-Tru Service in Half Moon Bay Today
If your Therma-Tru door is sticking, swelling, delaminating, or leaking at the sill, don’t wait for the next fog cycle to make it worse. Call (866) 505-5254 to schedule a free estimate. We’ll come out, look at what’s actually happening on your specific wall exposure, and tell you whether it’s a repair or a replacement. No guesswork.
Written by Noel Cabrera, Owner at Daly City Construction, serving Half Moon Bay, Montara Therma-Tru service, and the San Mateo County coast.