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Therma-Tru Construction in Los Altos, CA | Framework Contractors
We provide independent Therma-Tru construction service across Los Altos, from Fiber-Classic entry doors to Smooth-Star patio units. What makes our Therma-Tru work different here is simple: we know that a door swap in Los Altos is often a planning-counter project, not just a hardware swap. The city’s 45% lot-coverage cap and design review process shape how we spec, frame, and flash every opening. Call (844) 681-3590 for a free estimate, and let’s talk about your specific opening before you buy a slab.
Why Los Altos Residents Choose Us for Therma-Tru Service
Most Los Altos homes are single-story ranch houses built between the 1950s and 1970s, and their original entry doors have been through fifty or sixty winters of rain splashing off the foothills. We’ve replaced and retrofitted Therma-Tru in Loyola and throughout Los Altos in hundreds of these homes, so we know exactly how the units fail in this specific climate and housing stock. Noel Carbajal, our owner, grew up patching stucco and reroofing porches with his uncle before he studied Construction Technology at Santiago Canyon College. He’s been building and remodeling for nearly three decades now, and he’ll tell you the same thing he tells our crew: “Build it right the first time – the second time costs twice as much and nobody’s happy.”
We are an independent contractor. We are not authorized or endorsed by Therma-Tru, and we don’t push a single product line. We spec the right model for each opening, whether that’s a Fiber-Classic slab that matches the original 1960s profile or a Smooth-Star unit that holds up to west-facing sun. Therma-Tru sales & service is one part of what we do, but the Therma-Tru work we do in Los Altos is tailored to the homes and the planning process here.
Styles & brands we work with







Common Therma-Tru Construction Problems We Solve in Los Altos
- Rotted bottom rails on original Fiber-Classic doors. On 1950s and ’70s ranch homes, the original Therma-Tru Fiber-Classic doors often have rotted wood stiles and rails hidden under factory paint, especially at the bottom rail where winter rain splashes back from concrete stoops and irrigation overspray sits against the slab. We pull the unit, check the rough opening, and replace with a composite sill that drains properly.
- Chalky, cracked Smooth-Star surfaces on west- and south-facing entries. Smooth-Star fiberglass slabs develop hairline cracks and chalky oxidation after 15 to 20 years of UV exposure in Los Altos’s dry Mediterranean summers. The door still works, but paint won’t adhere and the surface looks tired. We can usually re-skin or replace the slab rather than the whole frame.
- Seized multi-point lock hardware. Older Therma-Tru units with multi-point locks seize or misalign as the door slab warps from heat gain on unshaded western exposures. Latches miss strikes, air and water infiltrate, and the door sticks. We realign or replace the hardware and resize the reveal as needed.
- Compressed and torn weatherstrip and sweep gaskets. Therma-Tru doors from the 1990s and 2000s often have gaskets that compress flat and tear, letting in wind-driven rain and embers during wildland-urban interface events. The door slab itself is often still sound. The seal package is not. We replace the full weatherseal assembly and add ember-resistant profiles where the foothills trigger WUI requirements.
- Threshold and sill rot from poor original flashing. Many Los Altos ranch homes were built with door pans that didn’t extend far enough past the stucco plane. Water gets behind the threshold, the subfloor rots, and the whole opening starts to sag. If the slab is sound but the frame or sill is rotted, we replace the entire assembly rather than patch it – rehanging and reflashing a compromised opening usually costs more than a new pre-hung unit.
Therma-Tru Service in Los Altos: What Local Conditions Mean for Your Equipment
Los Altos enforces a 45% lot-coverage cap and design review for second-story additions, so a kitchen or bath remodel that enlarges a window or door opening often needs a variance. This is the single biggest difference between Therma-Tru work in Los Altos and Therma-Tru repair in Mountain View or Palo Alto. In most flatland Peninsula cities, swapping a door is a straightforward trade: pull the old unit, hang the new one, flash it, call it done. In Los Altos, if you’re changing the size of the rough opening, widening a doorway, or converting a window to a patio slider, the project crosses into planning-counter territory. We coordinate Therma-Tru rough-opening specs with the planning department’s preferences before you order the slab, which avoids months of delay. On a 1962 ranch off University Avenue in the 94022 ZIP, a homeowner’s original Therma-Tru Fiber-Classic entry had a rotted bottom rail and failed weatherstrip that let winter rain pool on the threshold. We pulled the unit, found the rough opening framed for a 1¾-inch slab but slightly out of plumb, and installed a new Smooth-Star door with a composite sill and ember-resistant weatherseal to satisfy WUI requirements triggered by the nearby foothills. The new door sealed tight and passed inspection without a variance because we matched the existing opening size. That’s the kind of detail that protects your timeline in Los Altos.
Therma-Tru Models & Products We Service in Los Altos
We service the four main Therma-Tru door families: Fiber-Classic, Smooth-Star, Pulse, and the Professionals Series. Fiber-Classic is the workhorse we see most on original Los Altos ranch homes. Smooth-Star shows up on 1980s and ’90s remodels. Pulse and Professionals Series are more common on recent builds and replacements. Our parts approach: we source OEM Therma-Tru replacement slabs, hinges, locksets, and weatherseals when the existing frame and sill are solid. But when original profiles no longer seal against Los Altos winter rain and WUI ember intrusion, we switch to quality aftermarket flashing and threshold systems that actually stop water. We keep common Rough Opening sizes and weatherseal profiles stocked or available on short lead time for fast Los Altos turnaround.
See the difference
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AfterTherma-Tru Service Pricing in Los Altos
What drives the cost is whether you need a slab-only replacement, a full pre-hung unit swap, or a larger remodel that changes rough openings and triggers design review. A straight slab replacement on an existing frame costs far less than replacing a rotted sill or enlarging a doorway. Here are the line-item ranges we quote most often in Los Altos:
| Service | Price Range |
|---|---|
| Window Replacement (per opening, Therma-Tru entry or patio door) | $4,500 – $15,000 |
| Bathroom Remodel (including door and trim) | $9,000 – $28,000 |
| Full Kitchen Remodel (including door and window openings) | $14,000 – $45,000 |
A free estimate includes a site visit to measure the existing opening, check the frame and sill for rot, and tell you whether your project needs a variance or design review before we order anything. Call (844) 681-3590 for an exact quote. You won’t get a number that changes once the job starts.
Serving Los Altos, CA — Our Local Coverage Area
We’re our General Contractor in Los Altos 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 Los Altos
Yes, Los Altos requires a building permit for exterior door replacement when the rough opening size changes or when the door is in a fire-rated wall assembly. A same-size, same-opening slab swap usually falls under normal maintenance and does not need a permit, but we verify that with the planning counter before we start. Call (844) 681-3590 and we’ll check your specific address.
The WUI zone near the Los Altos foothills requires fire-resistant door assemblies, ember-resistant weatherseals, and non-combustible or ignition-resistant materials on exterior openings. That means some older Therma-Tru models with wood stiles and standard weatherstripping won’t pass a WUI inspection. We spec Smooth-Star fiberglass slabs with composite sills and ember-rated gaskets for those zones, and we coordinate with the fire marshal’s checklist. Call (844) 681-3590 for a WUI-specific assessment of your opening.
Yes, we can usually match the original Fiber-Classic profile or find a Smooth-Star replacement with the same panel layout and glass configuration. The challenge on 1960s Los Altos ranch homes is that the original door was often a 1¾-inch slab in a rough opening that’s now slightly out of plumb. We shim, plumb, and flash the opening properly, and we can source OEM or matching aftermarket brickmold and casing profiles. Call (844) 681-3590 with a photo of your existing door and we’ll identify it.
Bottom rail rot on older Fiber-Classic doors, UV-chalked Smooth-Star surfaces on unshaded west and south exposures, seized multi-point locks, and compressed weatherstrip gaskets. All four show up regularly in Los Altos because of the combination of winter rain splash, dry summer sun, and WUI air quality. Call (844) 681-3590 if you’re seeing daylight around your door or it’s sticking in the frame.
If the door is visible from the street and you’re changing the size, style, glass, or finish in a way that alters the home’s street-facing appearance, Los Altos design review may require approval before installation. A same-size, same-style replacement typically does not. We can tell you which camp your project falls into after a quick site visit. Call (844) 681-3590 and we’ll walk you through the approval path.
Service Areas Near Los Altos
We provide Therma-Tru construction service throughout Los Altos service area, including the 94022, 94023, and 94024 ZIP codes. We also serve Therma-Tru service in Los Altos Hills where WUI requirements are often stricter, and Therma-Tru service in Palo Alto for flatland homes with different planning review processes. If you’re in Santa Ana, Tustin, Orange, North Tustin, Garden Grove, or Fountain Valley, give us a call and we’ll let you know if we can schedule your Therma-Tru work.
Book Your Therma-Tru Service in Los Altos Today
If your Therma-Tru door is sticking, leaking, or showing rot at the bottom rail, don’t wait for the next winter storm. Call (844) 681-3590 to schedule a free estimate. We’ll measure your opening, check the frame and sill, and tell you exactly what you need, whether that’s a slab swap or a full pre-hung unit with WUI-compliant weatherseals.
Written by Noel Carbajal, Owner at Framework Contractors, serving Los Altos and the broader Peninsula since 1995.