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Therma-Tru Construction in Seacliff, CA | Iron Beam Contractors
We provide Rio Del Mar Therma-Tru service and independent Therma-Tru door and entry system service across Seacliff, from bluff-top homes to beach cottages along Monterey Bay. Our crews repair, re-hang, and replace Therma-Tru entry and patio doors, and the single biggest difference here is salt: onshore fog and wind-driven spray corrode hardware and thresholds years before the fiberglass slab itself fails. That changes what we inspect, what we replace, and what we recommend on nearly every Seacliff job. If you have a Therma-Tru door binding, leaking, or sagging, call (833) 756-5936 for a straight answer and a free estimate.
Iron Beam Contractors is an independent Therma-Tru service provider, not a manufacturer-authorized agent, so our recommendations are based on what holds up on coastal bluff properties, not what a factory program tells us to push. Nolan Driscoll built this company on telling homeowners exactly what’s in the wall before we open it, and that applies to every door we hang. We serve all of Seacliff, ZIP 95001, and we know which entries take the worst of the ocean exposure.
Why Seacliff Residents Choose Us for Therma-Tru Service
We’ve installed and serviced Therma-Tru entry and patio door systems along this stretch of the Monterey Bay coast for years, which means we’ve seen how the Fiber-Classic, Smooth-Star, and Classic-Craft lines actually behave in salt fog and driven winter rain. That field experience matters more than a brand logo on a truck. As an independent contractor, we repair what’s worth repairing and replace what coastal corrosion has already compromised, without any manufacturer agenda. If a slab is sound, we tell you it’s sound. If the jamb is rotted behind it, we say so before we touch a hinge.
We use OEM Therma-Tru replacement slabs, sills, sweeps, and weatherstripping when matching a specific line matters, and we switch to marine-grade stainless aftermarket hardware where salt exposure demands better corrosion resistance than factory parts provide. That’s not a marketing line; it’s what keeps a west-facing Seacliff entry from sagging again in three seasons. We also bring a full Seacliff General Contractor scope behind every job, so when a door repair uncovers rotten framing or a threshold that’s failed the subfloor, we don’t hand you a second phone number. One contractor handles the whole fix.
Styles & brands we work with







Common Therma-Tru Construction Problems We Solve in Seacliff
- Salt-fog corrosion on hinges and threshold screws. West-facing entries take direct onshore fog off Monterey Bay, and the factory zinc-plated hardware starts pitting and oxidizing within a few seasons. We see doors begin to bind and sag not because the slab moved, but because the hinges and threshold screws are rusting through. On bluff-top streets, this happens faster than homeowners expect.
- Chalking and peeling finishes on ocean-facing slabs. The fiberglass itself holds up, but factory-applied stains and paint on sun- and salt-exposed faces chalk and peel, exposing the substrate. We re-finish and re-seal these slabs or, when the finish has failed too far, quote an honest slab replacement through the same Therma-Tru line.
- Wind-driven rain getting past worn weatherstripping and sill sweeps. Winter storm surf drives rain horizontally into west-facing entries. Once the weatherstripping compresses and the sill sweep wears, moisture reaches the wood frame and jamb behind an otherwise sound Therma-Tru slab. That’s the rot we find most often in Seacliff beach cottages and ranch homes.
- Failed steel hinges and strike plates throwing doors out of alignment. Original steel hinges corrode on bluff-top and hillside homes, the mortise wears in the frame, and the door starts to drag or fail to latch. We replace with marine-grade stainless and re-hang the slab to factory tolerances before the frame takes permanent damage.
- Rotted jambs behind intact slabs. This is the big one on older Seacliff homes: the Therma-Tru slab looks fine, but the wood jamb behind it has been wicking salt-fog moisture for a decade. We repair or replace the jamb section, install an OEM sill and sweep, and re-hang the original slab when it’s structurally sound.
Therma-Tru Service in Seacliff: What Local Conditions Mean for Your Equipment
Because nearly every west-facing wall in Seacliff takes direct onshore fog and salt spray off Monterey Bay, Therma-Tru entry and patio doors here fail at the hardware and threshold long before the fiberglass slab does. That’s the opposite of what we see in inland Santa Cruz County homes, where the slab and finish are usually the first thing to go. On a mid-century beach cottage up on the bluff-top stretch, our crew pulled a sagging Therma-Tru Fiber-Classic entry door whose threshold screws had rusted through and whose jamb had swelled from years of salt-fog moisture. We replaced the rotted jamb section, swapped in marine-grade stainless hinges and an OEM sill and sweep, and re-hung the sound original slab. The owner kept the door face they liked while the entry finally sealed against winter storm rain. That’s the kind of repair that only makes sense when you know the difference between a coastal corrosion issue and a slab failure, and it’s exactly why so many Seacliff homeowners call us instead of a general handyman.
The Coastal Commission permitting layer adds another wrinkle. On bluff-adjacent lots, any exterior work touching the building envelope can trigger coastal development review, and we’ve worked enough Seacliff projects to know when a door repair stays a simple repair and when it crosses into permit territory. We flag that early, before a footing is poured or a jamb is cut, because surprise permit timelines are the last thing a homeowner needs on a hillside lot above the beach.
Therma-Tru Models & Products We Service in Seacliff
We service the full Therma-Tru residential door range: the Fiber-Classic smooth fiberglass entry doors, the Smooth-Star fiberglass line, the Classic-Craft premium fiberglass series, and Therma-Tru patio and sidelight door systems. We know the difference between a Smooth-Star factory finish and a Classic-Craft stain-grade face, and we match replacement slabs and components to the correct line rather than forcing a generic door into an existing frame. For parts, we keep OEM sills, sweeps, and weatherstripping available for common Therma-Tru configurations and order slab replacements direct when a matching door isn’t in local stock. Marine-grade stainless hardware is standard on any Seacliff entry that faces the water, because we’ve seen what the alternative does in two seasons.
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AfterTherma-Tru Service Pricing in Seacliff
What drives the cost is whether we’re repairing and re-hanging an existing slab or replacing a jamb and door together. Hardware replacement and re-hanging runs lower; a full jamb rebuild with a new OEM sill and sweep pushes higher. We give written line-item quotes before any work starts, and the estimate is free. Here are the most common Therma-Tru-adjacent project ranges on Seacliff homes:
| Service | Typical Range |
|---|---|
| Window Replacement | $4,500 – $15,000 |
| Full Bathroom Remodeling | $9,000 – $28,000 |
| Small Bathroom Remodel | $5,000 – $12,000 |
These are project ranges, not door-repair quotes, because so many Seacliff clients bundle entry work with window replacement or a bathroom remodel while we’re already on site. Call (833) 756-5936 for an exact number on your Therma-Tru door, and we’ll walk the job with you before we quote anything.
Serving Seacliff, CA — Our Local Coverage Area
We’re based in the Seacliff area and know this community well, and we also offer Therma-Tru in Aptos. Use the map below to see our service coverage — if you’re nearby, we can almost certainly help.
FAQs – Therma-Tru Construction in Seacliff
No. We’re an independent general contractor with years of hands-on Therma-Tru installation and service experience across the Monterey Bay coast. We use OEM parts for matching slab and component replacements, but we’re not bound by any manufacturer program, so we recommend marine-grade stainless hardware and repair-or-replace calls based on what actually holds up on Seacliff’s salt-fog frontage. Call (833) 756-5936 to talk through your specific door.
Window replacement in Seacliff typically runs $4,500 to $15,000 depending on window count, glass package, and whether you’re doing a whole-home replacement or a few west-facing units. Coastal exposure usually pushes homeowners toward insulated, corrosion-resistant frames and hardware, which sits at the upper end of that range. We also provide Therma-Tru service in Aptos Hills-Larkin Valley. Call (833) 756-5936 for a free line-item quote on your windows and any Therma-Tru door work at the same time.
We use OEM Therma-Tru slabs, sills, sweeps, and weatherstripping when matching a specific line, and we switch to marine-grade stainless aftermarket hinges and strike plates where Seacliff salt exposure demands better corrosion resistance than factory zinc-plated parts provide. If your slab is a Smooth-Star or Classic-Craft, we match it correctly rather than forcing a universal fit.
Most hardware replacements and re-hangs take one visit of a few hours. A full jamb rebuild with a new sill and sweep typically runs a full day including curing time. If we need to order a matching Therma-Tru slab, that adds whatever the supplier lead time is, and we’ll tell you that upfront before you commit to anything.
We service the Fiber-Classic, Smooth-Star, and Classic-Craft entry door lines, plus Therma-Tru patio door systems and sidelight assemblies. We handle slab replacement, frame and jamb repair, hardware corrosion fixes, weatherstripping and sill replacement, and full entry system installs. Call (833) 756-5936 and describe your door; we’ll tell you what line it is and what the realistic fix looks like.
Service Areas Near Seacliff
We serve Seacliff and the surrounding Monterey Bay and Santa Cruz County communities. For Therma-Tru work further north, see our Therma-Tru service in Capitola page. For inland mountain and valley properties, see Therma-Tru service in Day Valley. We also cover Aptos, Rio del Mar, and La Selva Beach. Check our full Seacliff service area page for coverage details. And for more on how we approach Therma-Tru work across the region, visit our Therma-Tru sales & service page.
Book Your Therma-Tru Service in Seacliff Today
If your Therma-Tru door is sagging, binding, leaking, or just not sealing the way it should, call (833) 756-5936 now. We’ll schedule a walkthrough on your Seacliff property, diagnose the real failure point, and give you a written free estimate. No pressure, just the straight answer.
Written by Nolan Driscoll, Owner at Iron Beam Contractors, serving Seacliff and the Monterey Bay coast.