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 Ben Lomond, CA | San Mateo Construction
We’re an independent construction crew serving Ben Lomond and the San Lorenzo Valley with full Therma-Tru door and window service – installation, repair, replacement, and weather-sealing. What makes our Therma-Tru work in Ben Lomond different is that we know mountain conditions: redwood canopy moisture, steep hillside settling, and CZU-era fire-hardening code. Call (855) 901-7266 for a free estimate.
Why Ben Lomond Residents Choose Us for Therma-Tru Service
Therma-Tru builds a genuinely good fiberglass and steel door – we’ve fitted their Fiber-Classic, Smooth-Star, and Classic-Craft lines on cabins, mountain homes, and post-CZU rebuilds all through 95005. But a door is only as good as how it’s installed and detailed for the site it lives on. That’s where we earn our keep. Noel Carrington started pouring concrete footings with his father in Baywood years ago, studied construction technology at Skyline College, and has spent the decades since working residential jobs across San Mateo County and into the Santa Cruz Mountains. The crew at San Mateo Construction approaches a Ben Lomond General Contractor Therma-Tru install expecting hillside movement, heavy winter rain, and ember exposure – not as afterthoughts, but as the reason for every flashing choice and every sill detail we make.
We’re independent. Therma-Tru doesn’t pay us, sponsor us, or authorize us – we simply know their product line cold, and we use OEM sills, sweeps, weatherstripping, and hinge hardware whenever a door is still serviceable. When a rotted bottom rail or cracked skin means a full slab swap makes more sense than a patch job, we’ll tell you that straight. That’s the kind of honest recommendation Ben Lomond homeowners tell their neighbors about.
Styles & brands we work with
Common Therma-Tru Construction Problems We Solve in Ben Lomond
- Green film and moss on north-facing shaded doors. Under dense redwood canopy, the north side of a Ben Lomond house can stay damp for weeks between rains. Therma-Tru fiberglass skins pick up moss and green growth that accelerate finish degradation if they’re not cleaned and re-sealed. We clean the surface carefully, address any seal failure, and re-finish the slab with the right coating for a permanently shaded mountain exposure.
- Hairline cracking in wood-grain Fiber-Classic skins. We see this on south-facing doors that get baked during the day and soaked by winter storms at night. The moisture swing on a Ben Lomond hillside is extreme, and wood-grain textured fiberglass skins can check or crack where the finish has already thinned. We assess whether the skin is still serviceable with a re-finish, or whether a replacement slab makes more sense long-term.
- Locksets that bind and misalign as hillside soil moves. Pier-and-post foundations on steep Ben Lomond lots settle and shift seasonally. A multi-point lock that worked in August might drag or refuse to latch by February. We re-align the frame, adjust the hinges, and reset the strike plates – and when the rough opening itself has moved, we re-square it so the slab closes cleanly through all four seasons.
- Thresholds and sills that wick storm water into the bottom rail. The San Lorenzo Valley gets concentrated winter rain, and redwood leaf litter piles up against door thresholds, trapping moisture right where it shouldn’t sit. We replace failed Therma-Tru OEM sills and sweeps, re-flash the opening, and make sure the door drains away from the jamb legs instead of into them.
- Fire-hardening gaps around door and window openings. After the 2020 CZU Lightning Complex fire, Ben Lomond homeowners are rebuilding with ember-resistance in mind. We inspect the perimeter flashing, seal gaps, and install details that meet WUI priorities while still shedding rain. One opening, two kinds of weather, and both of them mean business up here.
Therma-Tru Service in Ben Lomond: What Local Conditions Mean for Your Equipment
Here’s the thing about construction in Ben Lomond that flatland Therma-Tru pages never address: because so many lots sit under dense redwood canopy inside the Cal Fire wildland-urban interface, a door opening isn’t just a door opening – it’s where fire-hardening and moisture control collide. Heavy winter rain pounds the San Lorenzo Valley while the canopy holds dampness in place for months, and the same opening has to be sealed so an ember can’t find a void to smolder in during fire season. Every exterior door swap we do in Ben Lomond gets detailed for both: full perimeter flashing and sealed gaps against ember intrusion, plus a properly sloped sill and swept threshold so storm water never wicks into the bottom rail. That double exposure is precisely what generic flatland contractors miss, and it’s why our Brookdale Therma-Tru service and Ben Lomond work look different from what we’d do in, say, a Sunnyvale tract home. If you’re off a quiet road near the San Lorenzo River corridor, this matters even more – the ground moves, the rain comes sideways, and the redwood duff never stops piling up against your thresholds.
Therma-Tru Models & Products We Service in Ben Lomond
We service the full Therma-Tru lineup you’re most likely to find on Ben Lomond homes. The Fiber-Classic fiberglass entry door line, with its oak, fir, and mahogany wood-grain textures, is common on mid-century and redwood-era cabins. Smooth-Star doors – smooth face, clean profile, often in four-panel configurations – show up regularly on newer builds. Classic-Craft premium doors appear on higher-end mountain homes and post-CZU rebuilds where owners wanted the look of real wood with fiberglass durability. We also handle Therma-Tru hinged and sliding patio door systems, which are often the leak points where a deck meets the house. For hardware and seals, we stock or can quickly source OEM Therma-Tru sills, sweeps, weatherstripping, and hinge components from our San Mateo supply relationships, which means less waiting for Ben Lomond service calls than if we had to order everything piecemeal from an outside distributor.
See the difference
Before
After
Before
After
Before
AfterTherma-Tru Service Pricing in Ben Lomond
What you’ll pay depends on the scope. A door slab replacement on a standard rough opening costs far less than re-framing around a hillside that’s settled two inches in ten years. Here’s what to expect on the construction side:
| Service | Typical Range, Ben Lomond |
|---|---|
| Window Replacement | $4500 – $15000 |
| Impact Window Installation | $8000 – $25000 |
| Home Addition | $45000 – $130000 |
Site access – steep driveway, pier-and-post foundation, heavy debris, canopy proximity – affects labor more on Ben Lomond mountain lots than on flat lots. Our free estimate includes an on-site look at the rough opening, the surrounding slope, and what the existing flashing actually looks like. Call (855) 901-7266 to get a real number, not a guess.
Serving Ben Lomond, CA — Our Local Coverage Area
We’re based in the Ben Lomond area and know this community well, including Therma-Tru in Lompico. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Therma-Tru Construction in Ben Lomond
Yes – we’ve done exactly that on sloped parcels off the San Lorenzo River corridor. The key is re-squaring the rough opening before the new slab goes in, because pier-and-post framing shifts with seasonal soil movement. We re-align the frame, check the threshold pitch, and set the door so it latches cleanly year-round. Call (855) 901-7266 for a hillside-specific quote.
Usually not. The fiberglass substrate isn’t rotting like wood would; what you’re seeing is algae and moss feeding on surface moisture trapped under the redwood canopy. We clean the slab carefully, check for finish thinning or cracking, and re-seal with a coating suited to a permanently shaded Ben Lomond north face. If the skin itself has checked deeply, a slab replacement may be the better call – we’ll tell you which.
Seasonal hillside movement is the usual answer on Ben Lomond mountain lots. The framing around the opening shifts as soil moisture changes, pulling strike plates and hinges slightly out of alignment. We re-align the hardware, and if the rough opening has moved enough, we re-square it so the door operates consistently all year.
Yes – that’s actually the point of our approach in Ben Lomond. After CZU, we don’t install a door without checking the perimeter seal, caulk lines, and flashing for ember-intrusion gaps. The same opening gets detailed for both winter rain and wildfire season. It’s one scope, one crew, and it’s what the WUI codes demand up here.
Typically $4500 to $15000 depending on how many windows, the access, and whether you’re going to impact-rated glass. On steep lots with difficult access or a full retrofit, that number can climb toward the higher end. Call (855) 901-7266 and we’ll come out, measure, and give you a line-item estimate with no pressure.
Service Areas Near Ben Lomond
We take Therma-Tru and full-construction calls throughout San Mateo County and into the Santa Cruz Mountains – from Therma-Tru service in Bonny Doon to Therma-Tru service in Felton, and across our broader Ben Lomond service area. For the complete picture on our Therma-Tru capability, visit our Therma-Tru sales & service page.
On a sloped parcel off the San Lorenzo River corridor, our crew replaced a failing south-facing Therma-Tru Fiber-Classic entry door whose skin had checked and whose threshold was wicking storm water into the bottom rail. We reset the rough opening for the hillside settling, swapped in an OEM sill and sweep, and re-flashed the opening so the new slab sealed against driving winter rain while meeting the homeowner’s fire-hardening priorities. That’s the job we get called for most in Ben Lomond and Mount Hermon Therma-Tru service areas, and it’s the one we do best.
Book Your Therma-Tru Service in Ben Lomond Today
We serve Ben Lomond with Therma-Tru door and window work, plus full exterior-to-interior construction – window replacement, bathroom remodeling, and home additions. Tell us what you actually need, and we’ll figure out the right way to build it. Call (855) 901-7266 to schedule your free estimate.
Written by Noel Carrington, Owner at San Mateo Construction, serving Ben Lomond and the San Lorenzo Valley.