Blown-In Insulation in Palo Alto - Same-Day Service, Done Right the First Time

Fast, Reliable Blown-In Insulation Across Palo Alto

Most blown-in insulation jobs in Palo Alto run $2,800-$6,500 for a typical attic top-up or full replacement, and we can usually schedule a blower-door assessment within 48 hours. Our crews serve Palo Alto directly from the Bay Area office, so we’re familiar with the flat-roof Eichlers in Greenmeadow and the balloon-framed attics in Old Palo Alto alike. Call (650) 381-1512 for a written price before any work starts - that’s Haven Standard Clause 1, no exceptions.

Call (650) 381-1512

Why Topside Attic Insulation Union City Is Palo Alto’s Preferred Blown-In Insulation Company

We’ve worked on enough Palo Alto homes to know the difference between a 1920s craftsman in Old Palo Alto with a walkable attic and a 1958 Eichler in Fairmeadow with zero attic access. That distinction matters because the wrong scope wastes money and fails Title 24 compliance.

Our Palo Alto customers leave reviews that mention the blower-door numbers we publish - the before-and-after CFM50 readings that show exactly how much air sealing we achieved. We’re not guessing at performance; we’re documenting it. Dispatch runs from our San Francisco Bay Area office, and crews typically reach Palo Alto properties within the same scheduling window as our local core.

Under Haven Standard, you get a named technician, a text when they’re en route, and a Documented Photo Record before anyone leaves. We’ve completed 9,000+ homes since 2016, every one with a written price first and documented evidence after.

Our Blown-In Insulation Services in Palo Alto

Blown-In Cellulose

For the older 1920s-1940s homes in Old Palo Alto and the Professorville area, blown-in cellulose - treated ground paper with borate fire retardant - fills irregular joist bays and plugs gaps left by decades of wiring and plumbing modifications. We blow it dense, at 3.5-4.0 lbs per cubic foot, after we’ve sealed top plates, can lights, and chimney chases with fire-rated foam and rigid blocking. A typical Old Palo Alto attic cellulose job runs $3,200-$5,800 depending on existing depth and accessibility. We source cellulose from GreenFiber and Owens Corning, both with published thermal resistance values we verify on site.

Blown-In Fiberglass

In Palo Alto’s 1960s ranch-style homes - the non-Eichler tracts in Southgate and Duveneck/St. Francis - blown-in fiberglass works well where moisture management is the priority and the attic has adequate ventilation. Fiberglass doesn’t absorb water the way cellulose can, which matters in Palo Alto’s occasional winter-driven rain events that find their way through older roof flashing. We typically see $2,800-$4,900 for fiberglass top-ups in these homes. Our Blown-In Insulation team stocks Johns Manville fiberglass locally for fast turnaround on scheduled jobs.

Dense-Pack Wall Insulation

This is where Palo Alto’s Eichler story becomes unavoidable. The 1950s-1960s Eichler tracts in Greenmeadow, Green Gables, and Fairmeadow have 2×4 stud walls with no attic above and flat roofs that make conventional blown-in impossible. Dense-pack cellulose or fiberglass - blown into closed wall cavities at 3.25-3.75 lbs/cubic foot to eliminate convective looping - is the primary retrofit path. Too loose, and you get thermal bridging and air movement inside the cavity. We dense-pack to spec, verify with infrared during the process, and pair it with air sealing at the slab edge and roof deck. Typical Eichler dense-pack jobs in Palo Alto run $4,500-$8,200 depending on wall area and interior finish protection required.

In Greenmeadow, we opened a ceiling on a 1957 Eichler and found no accessible attic at all, just exposed tongue-and-groove over a flat roof, so our tech didn’t quote an attic blow; instead we dense-packed the wall cavities and used closed-cell Icynene from below to insulate the cathedral ceiling plane before re-roofing. The house had the original radiant slab, so we explained that our scope only addresses the ceiling and wall leaks, not the slab, and paired the work with CPAU’s insulation and air-sealing rebates.

Blown-In Top-Up

For Palo Alto homes that already have some attic insulation but have settled below current Title 24 standards - common in 1970s-1990s builds in Barron Park and Midtown - we top up with matching material after verifying what’s there and sealing any new penetrations. We don’t blow over unsealed leaks. A top-up runs $2,200-$3,800 in most Palo Alto attics we assess. You get before-and-after blower-door numbers if the scope includes air sealing, and a photo record either way.

Before

After

Trusted Brands We Service in Palo Alto

We stock Owens Corning fiberglass, Johns Manville mineral wool blends, and GreenFiber cellulose for Palo Alto jobs - no proprietary lock-in, no special-order delays. For Eichler roof-plane work and dense-pack complement, we also source Demilec closed-cell foam. Parts and materials sit in our Bay Area warehouse, so when a Palo Alto job scopes out, we’re not waiting on freight. The brands are listed on your written scope, with product data sheets attached, so you know exactly what was installed and can reference it for CPAU rebate documentation.

Common Blown-In Insulation Problems We See in Palo Alto Homes

• Contractors quote attic blown-in on Eichlers and can’t install it because there is no attic. We’ve seen scopes written for “attic cellulose” on Fairmeadow Eichlers with flat roofs and exposed T&G ceilings. The crew arrives, realizes there’s no access, and either abandons the job or tries to blow into the roof cavity through exterior vents. Neither works. The right scope for these homes is dense-pack walls plus roof-deck foam or rigid board during re-roofing.
• Dense-packing too loosely in old 2×4 Eichler walls leaves convective loops and thermal bridging. Eichler 2×4 walls are already thermally limited. At less than 3.25 lbs/cubic foot, dense-pack cellulose settles and air circulates inside the cavity, defeating the R-value you paid for. We verify density with cavity fill rates and spot-check with thermal imaging.
• Air-sealing is skipped so blown-in performance is undermined by leaks at the flat roof and slab edges. Blown-in insulation doesn’t stop air movement. In Palo Alto’s 90°F+ summer heat events, an unsealed Eichler ceiling leaks conditioned air upward while pulling hot attic air - or roof-deck heat - downward. We seal first, then insulate. In that order. Always.
• Homeowners miss stacked CPAU rebates by using contractors who only know PG&E programs. City of Palo Alto Utilities runs separate insulation and air-sealing incentives, and many Palo Alto properties qualify for both CPAU and PG&E layers. We document our work to both standards and flag the stack on your written scope.

Pricing for Blown-In Insulation in Palo Alto, CA

We Also Serve Cities Near Palo Alto

Our crews work Blown-In Insulation in Palo Alto and surrounding communities regularly: Stanford, Menlo Park, Atherton, and Los Altos. Each has its own housing stock patterns - Atherton’s estate custom homes, Los Altos’s hillside ranches with vented attics - and we scope accordingly. Same written-price standard, same blower-door documentation, same Haven Standard applies.

FAQs - Blown-In Insulation in Palo Alto