Insulation in Los Altos, CA
Crawl space encapsulation and vapor barrier installation in Los Altos typically runs $3,500-$7,500 for a standard ranch home, with most jobs completed in two days. The city’s 1950-1975 housing stock sits on raised foundations with dirt crawl spaces that pull moisture from the clay soils and vent cold air from the Santa Cruz Mountain foothills directly into the floor system. We start every Los Altos crawl space job with a written price and a blower-door baseline, then seal the envelope before adding any insulation. Call (650) 381-1512 for a free estimate with upfront pricing.
Why Los Altos Homes Are Different
Los Altos is dominated by single-story ranch homes built between roughly 1950 and 1975 - constructed before California adopted meaningful energy codes, when the “mild Bay Area climate” was used to justify minimal or zero wall insulation and token attic coverage. Combined with cold-air drainage off the adjacent Santa Cruz Mountain foothills pushing nighttime lows 5-8°F below neighboring Mountain View or Sunnyvale, and PG&E’s among-the-highest residential rates in the nation, insulation retrofits here deliver outsized ROI - a message that resonates powerfully with Los Altos’s energy-literate, tech-affluent homeowners.
The shallow, low-pitched roofs on these ranches make blown-in cellulose or fiberglass the standard retrofit method rather than batt installation. Crawl spaces beneath raised foundations represent a near-universal encapsulation opportunity. Technicians frequently open walls in core neighborhoods to find bare studs with no insulation whatsoever - a standard California tract-building shortcut of the era - making blown-in wall insulation a high-value discovery on a large share of jobs.
Our Main Los Altos Services
Los Altos homeowners call us most often for attic work and spray foam applications. These three services have dedicated Los Altos pages with deeper detail.
Attic Insulation in Los Altos
Shallow attic profiles on Los Altos ranches make blown-in cellulose or fiberglass the practical choice over batt installation. We air-seal top plates, can lights, and penetrations first, then blow to the thermal depth the roof geometry allows. Every job gets a written price before work starts and a documented photo record when the crew leaves. Attic Insulation in Los Altos covers material selection, R-value targets, and blower-door verification for this housing stock.
Spray Foam Insulation in Los Altos
We use open-cell and closed-cell spray foam from Icynene and Demilec for rim joists, kneewalls, and conditioned attic conversions where space is tight and air sealing is critical. Los Altos’s pre-1975 homes benefit especially from foam’s air-barrier properties in irregular framing bays that fiberglass cannot seal. Spray Foam Insulation in Los Altos details applications, costs, and when foam outperforms blown-in methods.
Blown-In Insulation in Los Altos
Blown-in cellulose from GreenFiber and fiberglass from Owens Corning remain the most cost-effective retrofit for Los Altos’s sprawling ranch attics. The material conforms to shallow roof pitches and fills around ductwork and electrical penetrations that batt insulation leaves exposed. Blown-In Insulation in Los Altos explains density, coverage rates, and how we verify depth with attic rulers.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Before
AfterCrawl Space Encapsulation & Vapor Barrier in Los Altos
Los Altos’s 1950-1975 ranch homes sit on raised perimeter foundations with vented dirt crawl spaces that pull moisture year-round from the clay-heavy soils and admit cold air draining off the Santa Cruz Mountain foothills. Without encapsulation, that moisture migrates through the floor system, raising indoor humidity in summer and amplifying heat loss in winter when PG&E’s tiered rates are already punishing. We treat Crawl Space Encapsulation & Vapor Barrier as a building-envelope repair, not a basement finishing project - sealed first, insulated second, documented throughout.
Crawl Space Vapor Barrier
Signs you need it
Musty odors rising from floor registers, condensation on ductwork in June, or fiberglass batts sagging and blackening between joists indicate ground moisture is exceeding the crawl space’s ability to dry.
What it costs in Los Altos
A 6-mil to 20-mil vapor barrier covering 1,000-1,500 square feet of dirt floor typically runs $1,800-$3,500 in Los Altos, with thicker mil ratings and full seam sealing at the higher end.
How we do it
We remove debris, grade the soil for drainage, lay overlapping polyethylene sheets sealed at seams and piers, and terminate edges against the foundation walls with mechanical fastening.
Crawl Space Encapsulation
Signs you need it
Standing water after rain, rusted furnace components, or hardwood cupping visible from inside the living space means vapor barrier alone is insufficient and full encapsulation is warranted.
What it costs in Los Altos
Complete encapsulation with sealed vapor barrier, closed-cell foam on foundation walls, and a dehumidifier or conditioned-air supply typically ranges $4,500-$8,500 for a Los Altos ranch crawl space.
How we do it
We seal all vents, apply closed-cell foam to wall surfaces, install the vapor barrier as a continuous ground cover, and add mechanical drying or a small conditioned-air supply to maintain relative humidity below 60 percent.
What Crawl Space Encapsulation & Vapor Barrier Costs in Los Altos
| Item | Typical range in Los Altos |
|---|---|
| Vapor barrier (6-20 mil, dirt floor only) | $1,800 - $3,500 |
| Full encapsulation with wall foam | $4,500 - $8,500 |
| Dehumidifier or conditioned-air tie-in | $800 - $2,200 |
How long does crawl space encapsulation take in Los Altos?
Most Los Altos ranch crawl spaces take two to three days: one day for prep and sealing, one for insulation and barrier installation, and a half day for dehumidifier or HVAC tie-in if included. We deliver a written scope before starting and photo documentation at completion. Call (650) 381-1512 to schedule a free estimate.
Will encapsulation affect my home’s ventilation?
Yes, intentionally - we convert the crawl space from a vented, outside-air space to a sealed, conditioned or semi-conditioned zone that no longer exchanges air with the exterior, which is the entire point of reducing moisture and thermal loss. The work includes blocking vents and, if code requires, adding a small supply register or dehumidifier to maintain healthy air.
Radiant Barrier Installation in Los Altos
Los Altos’s low-pitched ranch roofs absorb significant solar gain through dark asphalt shingles, and the shallow attic cavities trap that heat close to the ceiling plane where insulation alone cannot block radiant transfer. A radiant barrier - reflective foil or reflective roof-deck coating - reduces attic surface temperatures by 20-40°F in summer, cutting air-conditioning runtime in homes that already struggle with PG&E’s peak-tier pricing. We install Radiant Barrier Installation as a standalone retrofit or paired with air sealing and insulation upgrades, with before-and-after attic temperature readings documented.
Attic Radiant Barrier
Signs you need it
Second-story rooms that stay hot past 10 p.m., AC units cycling continuously on June afternoons, or ceiling surfaces you can feel radiating heat indicate radiant gain is overwhelming your insulation’s conductive resistance.
What it costs in Los Altos
Foil radiant barrier stapled to rafters or laid over attic insulation in a standard Los Altos ranch runs $1,200-$2,800, with complex roof geometries or combined air-sealing packages at the higher end.
How we do it
We drape perforated foil across rafter bays or staple it to the underside of roof decking, maintaining an air gap on at least one side so dust accumulation does not degrade reflectivity over time.
Radiant Barrier Roof Deck
Signs you need it
During reroofing or major attic work, homeowners who plan to stay in the home long enough to amortize the upgrade see the best return from a roof-deck application that cannot be disturbed by future attic traffic.
What it costs in Los Altos
Reflective roof-deck sheathing or liquid-applied radiant coating installed during reroofing typically adds $1,800-$4,200 to the Los Altos job, depending on roof square footage and accessibility.
How we do it
We install OSB with factory-laminated reflective foil facing the attic, or spray a low-emissivity coating directly to the deck underside, integrating with the roofing contractor’s schedule and documenting attic temperature before and after.
What Radiant Barrier Installation Costs in Los Altos
| Item | Typical range in Los Altos |
|---|---|
| Foil radiant barrier (attic application) | $1,200 - $2,800 |
| Roof-deck reflective sheathing or coating | $1,800 - $4,200 |
| Radiant barrier with air sealing package | $2,800 - $5,500 |
Does radiant barrier work in Los Altos’s mild climate?
Yes - the metric that matters is attic temperature, not outdoor ambient, and Los Altos attics with dark shingles regularly reach 140-160°F in July; a radiant barrier can cut that by 30°F or more, reducing conductive heat flow into living spaces even when the thermostat reads only 85°F outside. Call (650) 381-1512 for a free estimate with attic temperature readings.
Will dust ruin the radiant barrier over time?
Dust on the upward-facing surface does reduce reflectivity, which is why we prefer draped foil in rafter bays where air movement keeps surfaces cleaner, or roof-deck applications protected by the roofing assembly; we document the installation method and expected performance in your written scope.
Insulation Removal & Replacement in Los Altos
Los Altos’s 1950-1975 housing stock contains attics with original fiberglass batts compressed to half their labeled R-value, rodent-contaminated cellulose, or vermiculite that may contain asbestos - all of it performing worse than no insulation in some cases because it blocks visual inspection and traps moisture against the ceiling plane. Removal is not demolition; it is diagnostic, revealing air leaks, framing defects, and pest pathways that were hidden for decades. We handle Insulation Removal & Replacement with HEPA containment, negative air pressure, and a written disposal record, then air-seal before installing new material.
Contaminated Insulation Removal
Signs you need it
Urine staining on ceiling drywall, persistent rodent odors, or fiberglass batts darkened with droppings and compressed to less than two inches thick indicate biological contamination that air sealing alone cannot fix.
What it costs in Los Altos
HEPA-contained removal and disposal of contaminated attic insulation in a standard Los Altos ranch runs $2,200-$4,500, with severe contamination or limited attic access adding labor hours.
How we do it
We establish negative air pressure with HEPA filtration, remove material in sealed bags, apply enzymatic sanitizer to exposed framing, and document the cavity condition with photos before any new insulation goes in.
Vermiculite & Old Insulation Removal
Signs you need it
Gray-brown pebbly material between joists, especially in homes built before 1980, is likely vermiculite that requires asbestos testing and abatement-protocol removal before any retrofit work can proceed safely.
What it costs in Los Altos
Vermiculite removal with third-party asbestos testing, abatement containment, and lawful disposal typically ranges $4,500-$9,000 in Los Altos, with lab clearance and documentation included.
How we do it
We collect a sample for PLM analysis, and if positive, engage a licensed abatement contractor under our supervision; after clearance air sampling, we air-seal and reinsulate with modern materials and provide the full documentation chain.
What Insulation Removal & Replacement Costs in Los Altos
| Item | Typical range in Los Altos |
|---|---|
| Contaminated insulation removal (HEPA) | $2,200 - $4,500 |
| Vermiculite removal with asbestos protocol | $4,500 - $9,000 |
| Removal + air sealing + new insulation | $5,500 - $12,000 |
Can you remove insulation without making a mess in the house?
Yes - we isolate the attic hatch with plastic sheeting, run negative air machines with HEPA filters, and remove material directly into sealed bags through the attic access; no insulation enters your living space. Call (650) 381-1512 for a free estimate and written scope.
Do I have to remove old insulation before adding new?
Not always - if the existing material is dry, uncompressed, and uncontaminated, we can air-seal over it and add blown-in fill; but in Los Altos’s pre-1975 homes, we find that 60 percent of attics benefit from removal to expose and seal the air leaks hidden beneath.
Attic Air Sealing in Los Altos
Los Altos’s pre-1975 ranch homes were built with no top-plate sealing, unsealed can-light penetrations, and duct boots that pull conditioned air directly into the vented attic - a design that treated the attic as an extension of the outside. The result is blower-door readings routinely double what a modern home of the same size would show, with heated air escaping all winter and attic heat infiltrating all summer. We treat Attic Air Sealing as the mandatory first step before any insulation upgrade, and we publish before-and-after blower-door numbers so you can verify the performance change.
Top Plate & Penetration Sealing
Signs you need it
Dust streaks on insulation around the attic perimeter, visible gaps where interior walls meet the ceiling plane, or cobwebs concentrated at wiring and plumbing penetrations indicate unsealed top plates acting as chimneys for conditioned air.
What it costs in Los Altos
Comprehensive top-plate and penetration sealing with fire-rated caulk and spray foam in a standard Los Altos ranch attic runs $1,800-$3,500, with complex rooflines or multiple HVAC zones adding labor.
How we do it
We pull back existing insulation, seal all top-plate gaps with fire-rated acrylic latex or two-part foam, foam around every wire and pipe penetration, and verify with a blower-door test before reinstalling insulation.
Can Light & Duct Boot Sealing
Signs you need it
IC-rated can lights with visible gaps around the housing, flex duct connections that move freely, or temperature differences of more than 10°F between supply registers indicate duct leakage and unsealed penetrations wasting conditioned air.
What it costs in Los Altos
Sealing can-light housings with pre-formed covers and mastic-sealing duct boots in a typical Los Altos ranch runs $800-$2,200, with recessed light count and duct configuration driving the specific figure.
How we do it
We install fire-rated covers over can lights, seal with high-temperature caulk, apply mastic to every flex-duct connection and metal boot, and pressure-test the duct system to confirm leakage reduction.
What Attic Air Sealing Costs in Los Altos
| Item | Typical range in Los Altos |
|---|---|
| Top plate & penetration sealing | $1,800 - $3,500 |
| Can light & duct boot sealing | $800 - $2,200 |
| Full attic air sealing package | $2,500 - $5,000 |
How much does air sealing improve my blower-door score?
Typical Los Altos ranch homes start at 3,500-5,500 CFM50 and finish at 2,000-3,000 CFM50 after comprehensive attic air sealing - a 30-45 percent reduction in envelope leakage that we document with before-and-after readings in your project file. Call (650) 381-1512 for a free estimate with blower-door testing included.
Can you air-seal without removing all the insulation?
We need to move insulation aside to access top plates and penetrations, but we do not remove it from the attic; we section the work, seal exposed areas, and replace insulation as we go, with any disturbed areas topped off to original depth at completion.
Wall Insulation in Los Altos
Technicians working pre-1975 Los Altos ranch homes frequently open walls to find bare studs with no insulation whatsoever - a standard California tract-building shortcut of the era - making blown-in wall insulation a high-value discovery upsell on a large share of retrofit jobs in the city’s core neighborhoods. The 2×4 framing common to this era limits depth to R-13 or R-15, but even that modest improvement cuts conductive heat loss through walls that currently perform like single-pane windows. We offer Wall Insulation as a retrofit service with minimal interior disruption, and we verify fill density with thermal imaging after installation.
Drill & Fill Wall Insulation
Signs you need it
Walls that feel cold to the touch in January, rooms with exterior walls that are consistently 5°F cooler than interior rooms, or removal of a switch plate revealing an empty cavity indicate uninsulated walls.
What it costs in Los Altos
Drill-and-fill cellulose or fiberglass in a standard Los Altos ranch with 800-1,200 square feet of exterior wall area runs $2,500-$5,000, with plaster walls or interior access requirements adding labor.
How we do it
We drill 2-inch holes at stud-bay spacing, blow cellulose or fiberglass to verified density with a fill tube, plug holes with matching material, and confirm complete cavity fill with thermal imaging from the interior.
Injection Foam Wall Insulation
Signs you need it
Homes with existing batt insulation that has settled or moisture-damaged, or homeowners seeking superior air sealing in addition to thermal resistance, are candidates for slow-cure injection foam that seals as it insulates.
What it costs in Los Altos
Injection foam wall insulation for a Los Altos ranch with typical exterior wall footage ranges $4,000-$7,500, with foam type and wall condition affecting material and labor requirements.
How we do it
We access cavities through exterior siding or interior drywall, inject slow-rise foam that expands to fill irregular voids and seals air leaks simultaneously, trim excess after cure, and verify with thermal imaging and blower-door testing.
What Wall Insulation Costs in Los Altos
| Item | Typical range in Los Altos |
|---|---|
| Drill & fill (cellulose or fiberglass) | $2,500 - $5,000 |
| Injection foam wall insulation | $4,000 - $7,500 |
| Wall insulation with air sealing package | $3,500 - $8,000 |
Will drill-and-fill damage my drywall?
Interior drill-and-fill requires patching 2-inch holes, which we match to texture and paint; many Los Altos homeowners schedule the work during interior painting projects to simplify coordination. Call (650) 381-1512 for a free estimate and written scope.
How do you know if my walls are empty?
We use thermal imaging during the initial assessment to identify temperature differentials consistent with uninsulated cavities, and if ambiguous, we remove a single switch or outlet plate to visually confirm - no exploratory demolition without homeowner approval.
Attic Cleaning & Rodent Proofing in Los Altos
Los Altos’s mature tree canopy and mild winters support roof rat and mouse populations that exploit the gaps in pre-1975 construction to nest in attics, contaminating insulation and compromising the air barrier with gnawed openings. The shallow attic spaces on local ranches mean rodents are never far from the ceiling plane, and their activity often goes unnoticed until odors or electrical damage appear. We provide Attic Cleaning & Rodent Proofing as a restoration service that removes contamination, excludes pests, and documents the repair so future inspections are straightforward.
Attic Sanitizing & Decontamination
Signs you need it
Ammonia-like odors in upper rooms, visible droppings on insulation surfaces, or HVAC return air that smells stale despite filter changes indicate active or recent rodent contamination requiring professional cleanup.
What it costs in Los Altos
HEPA vacuuming, enzymatic sanitizing, and deodorizing of a standard Los Altos ranch attic runs $1,500-$3,500, with heavy contamination or partial insulation removal adding to the scope.
How we do it
We remove contaminated insulation if necessary, HEPA-vacuum all surfaces, apply enzymatic cleaner that breaks down organic waste, fog with odor neutralizer, and document the sanitized condition with photos before any new material is installed.
Rodent Proofing & Exclusion
Signs you need it
Scratching sounds in walls at dusk, gnaw marks on soffit vents, or recurring pest activity after trapping indicate entry points that exclusion sealing must address permanently.
What it costs in Los Altos
Comprehensive rodent proofing with metal flashing, hardware cloth, and sealant at all roof and foundation penetrations for a Los Altos ranch typically ranges $1,200-$2,800, with roof complexity and entry point count affecting labor.
How we do it
We inspect the roofline, soffits, vents, and foundation with the homeowner present, seal every gap larger than one-quarter inch with rodent-proof materials, install vent guards, and provide a written exclusion map with photo documentation.
What Attic Cleaning & Rodent Proofing Costs in Los Altos
| Item | Typical range in Los Altos |
|---|---|
| Attic sanitizing & decontamination | $1,500 - $3,500 |
| Rodent proofing & exclusion | $1,200 - $2,800 |
| Full attic restoration (cleaning + proofing + reinsulation) | $4,500 - $9,500 |
Do you trap rodents or just seal the entry points?
We focus on exclusion - sealing entry points so rodents cannot re-enter - and we partner with licensed pest control for active trapping when needed; our scope is the building-envelope repair that prevents recurrence, documented with photos. Call (650) 381-1512 for a free estimate.
Will rodent proofing affect my attic ventilation?
We maintain required ventilation area by replacing damaged or gnawed screens with rodent-proof hardware cloth of equivalent free-air percentage, and we document the before-and-after vent configuration in your project file.
Home Energy Audit in Los Altos
A home energy audit in Los Altos reveals the specific sequence of repairs that will reduce PG&E bills in a pre-1975 ranch, rather than guessing at insulation depth or assuming the attic is the primary problem. The audit combines blower-door testing, thermal imaging, and combustion safety checks to quantify air leakage, insulation gaps, and duct losses in a single report with prioritized recommendations and estimated savings. We conduct Home Energy Audit visits with a written price before arrival and a documented record including all test data and photos.
Blower Door Test
Signs you need it
Rooms that never reach thermostat setpoint, drafts despite closed windows, or energy bills that spike in both heating and cooling seasons indicate envelope leakage that a blower-door test can quantify precisely.
What it costs in Los Altos
A standalone blower-door test with written report for a Los Altos ranch runs $350-$650, with multi-zone testing or combined duct-blaster testing at the higher end.
How we do it
We install a calibrated fan in an exterior door, depressurize the house to 50 Pascals, measure CFM50 leakage, and use smoke pencils and thermal imaging to locate the dominant leakage paths while the fan is running.
Thermal Imaging Inspection
Signs you need it
Streaky patterns on ceilings after cold nights, rooms that cool faster than others, or suspected missing wall insulation are all conditions that thermal imaging validates or rules out without wall penetration.
What it costs in Los Altos
Thermal imaging as part of a comprehensive energy audit runs $200-$400 additional, or $450-$850 as a standalone inspection with written report and annotated images for a typical Los Altos home.
How we do it
We scan the building envelope with a calibrated infrared camera during heating or cooling season when temperature differentials are at least 18°F, capturing images that show insulation voids, air leakage, and moisture patterns with reference temperatures noted.
What Home Energy Audit Costs in Los Altos
| Item | Typical range in Los Altos |
|---|---|
| Blower-door test with written report | $350 - $650 |
| Full energy audit (blower door + thermal + ducts) | $600 - $1,200 |
| Thermal imaging inspection standalone | $450 - $850 |
Will the audit tell me exactly what to fix first?
Yes - the report ranks recommendations by cost-effectiveness and estimated annual savings, so a Los Altos homeowner with limited budget can sequence repairs starting with the highest-ROI item, typically attic air sealing. Call (650) 381-1512 to schedule; the audit price is credited toward any work we perform.
How long does a home energy audit take?
A comprehensive audit takes three to four hours for a standard Los Altos ranch, including setup, testing, interior and exterior thermal imaging, and a preliminary walkthrough of findings; the written report with prioritized recommendations follows within two business days.
Brands We Service in Los Altos
We source insulation and air-sealing materials from Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber - no proprietary product lock-in means we specify what performs for your specific Los Altos home, not what a manufacturer requires us to sell. Most materials are stocked locally for next-day availability on approved jobs. Our brands page details specifications and warranty terms.
Pricing for Insulation in Los Altos, CA
| Service | Typical range in Los Altos |
|---|---|
| Crawl space vapor barrier (dirt floor) | $1,800 - $3,500 |
| Crawl space full encapsulation | $4,500 - $8,500 |
| Radiant barrier (attic foil) | $1,200 - $2,800 |
| Radiant barrier (roof deck) | $1,800 - $4,200 |
| Contaminated insulation removal | $2,200 - $4,500 |
| Vermiculite removal (asbestos protocol) | $4,500 - $9,000 |
| Attic air sealing (top plates & penetrations) | $1,800 - $3,500 |
| Attic air sealing (can lights & ducts) | $800 - $2,200 |
| Wall insulation (drill & fill) | $2,500 - $5,000 |
| Wall insulation (injection foam) | $4,000 - $7,500 |
| Attic sanitizing & decontamination | $1,500 - $3,500 |
| Home energy audit (full) | $600 - $1,200 |
Prices in Los Altos trend toward the higher end of these ranges for homes with plaster ceilings, limited attic access, or active rodent issues requiring remediation before insulation work. Every job begins with a written price - no work starts without it - under Haven Standard Clause 1.
Neighborhoods We Serve in Los Altos
Our crews work throughout Los Altos, from the older ranch neighborhoods near downtown to the hillside homes along the Foothill Expressway corridor. Most Los Altos appointments are available within 48 hours of call, with same-day emergency response for active water or pest issues affecting the building envelope.
- North Los Altos (original ranch tracts, 1950s-1960s)
- South Los Altos (Loyola Corners area, mixed-era construction)
- Loyola Corners
- Portola Valley border hills
- Grant Road corridor
Service Area - Cities Near Los Altos
Dispatch and scheduling are coordinated from our San Francisco Bay Area office; crews serve Los Altos locally and the surrounding communities without the delay of routing from distant yards. We also work in Mountain View, CA, Stanford, CA, Palo Alto, CA, and Menlo Park, CA on a regular schedule.
Serving Los Altos, CA - Our Local Coverage Area
We’re based in the Los Altos 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 About Insulation in Los Altos
Attic insulation replacement typically does not require a permit in Los Altos, but crawl space encapsulation, wall insulation that involves structural modification, and any electrical or HVAC changes do; we identify permit requirements during the initial assessment and include any fees in your written price.
Our live answering takes calls 24/7, and we schedule Los Altos assessments within one to two business days for standard requests; active moisture, pest, or safety issues get same-day or next-morning priority depending on crew availability.
Most Los Altos HOAs regulate exterior appearance changes, not invisible attic or crawl space work, but we review your CC&Rs during the estimate phase and document that the proposed scope is interior building-envelope maintenance if the HOA requests confirmation.
What happens when you call
- 1A real person answersNo phone trees - talk to a local insulation pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3A background-checked tech heads outLicensed & insured, typically within 60-minute.
- 4You approve before work beginsNothing starts until you say go.
What Los Altos Customers Say
"They air-sealed the attic floor before insulating and showed me the blower-door number before and after. The upstairs is finally the same temperature as downstairs."
- Marisol D."Two other companies quoted to blow more insulation on top of what was there. These were the only ones who said the existing material had to come out first, and explained why."
- Clifford E."They photographed rodent damage in the old insulation that we had no idea about, and priced the exclusion work separately so we could decide."
- Harriet N.