Fast, Reliable Insulation Removal Across San Francisco
Insulation removal in San Francisco typically runs $1.50 to $3.50 per square foot, with most attic jobs landing between $1,800 and $4,200 depending on access, material type, and whether mold remediation is needed. We’re Alden Insulation San Francisco, and our crews work in the Sunset, the Richmond, Noe Valley, Bernal Heights, and every neighborhood in between. If you’ve got old, settled, or damp insulation that’s no longer doing its job, call (559) 245-9792 and we’ll give you a written price before any work starts. That’s how we operate, and it’s how we’ve operated since 2002.
Why Alden Insulation San Francisco Is San Francisco’s Preferred Insulation Removal Company
San Francisco homeowners deal with a specific set of problems that contractors from the East Bay or the Peninsula often misread. Our crews know what a 1910 Edwardian’s wall cavities look like from the inside. We know what fog does to fiberglass over thirty years. We know which Sunset district stucco homes have original batt insulation that’s slumped to nothing. That local knowledge means we diagnose correctly the first time, and we don’t recommend removal when a repair would actually serve you better.
Every job we do in San Francisco is covered by the 365-Day Done Right Promise. It’s a written guarantee: if the work fails within a year, we come back at no charge. That’s not marketing language. It’s in the contract. The price we quote before tools come off the truck is the price on your invoice. Bryce Holloway runs this operation, and he holds every technician to The Garrison Standard, the same standard the Garrison Partners family has enforced since 2002.
We answer our phones with a live person, 24 hours a day. Not a voicemail, not a callback form. When you call about moldy insulation in a rental unit on a Saturday morning, a human picks up and schedules a real appointment. Our technicians arrive in uniform, background-checked, and inside the window we promised.
Attic Insulation Replacement in San Francisco
Attic Insulation Replacement in San Francisco usually means pulling out material that’s been up there since before the house was converted, before the roof was last replaced, and often before anyone thought about air sealing. The city’s older homes, especially Victorians and Edwardians built before 1940, frequently have zero original insulation in the walls and whatever the attic got was added piecemeal over decades. When we replace it, we remove everything down to the deck, address any moisture or pest issues, and install new material matched to the building’s actual needs.
Most attic insulation replacement jobs in San Francisco run $2,200 to $5,500 for a typical 1,200 to 1,800 square foot home. Steep roofs, limited access hatches, and multi-story buildings push toward the higher end. We always give the written price before work begins.
Removal Before Replacement
You can’t just blow new insulation over old, settled material and expect it to perform. Old cellulose in San Francisco attics settles to half its original R-value over thirty or forty years, and it’s often full of dust, rodent debris, and whatever else found its way up there. We remove it completely, inspect the framing, and only then install new material from brands like CertainTeed or Rockwool.
Air Sealing During Replacement
In San Francisco’s fog belt, air leaks matter more than insulation thickness. Warm air leaking into a cold attic creates condensation, which leads to mold on the underside of the roof deck. During replacement, we seal the gaps around plumbing vents, wiring penetrations, and the attic hatch before any new insulation goes in. It’s standard practice on our jobs, not an upcharge.
Moldy Insulation in San Francisco
Moldy Insulation in San Francisco is more common here than almost anywhere else in California. The same marine air that keeps the city cool in August also keeps attics and wall cavities damp. When insulation stays damp, mold grows. And when that insulation is inside a multi-unit Victorian with shared walls, the problem spreads before anyone notices.
Removing moldy insulation properly costs more than standard removal because it requires containment, negative air pressure, and careful disposal. In San Francisco, expect to pay $3.00 to $5.50 per square foot for moldy insulation removal, with most full attic jobs running $3,500 to $7,000. We use products from GreenFiber and Rockwool in mold-prone buildings because both resist moisture better than standard fiberglass.
Containment and Safety
Disturbing moldy insulation sends spores into the air. Our crews seal off the work area, run negative air machines, and bag the contaminated material before it leaves the attic. We don’t just yank it out and drag it through your hallway. That’s how you make a bad situation worse, especially in occupied multi-unit buildings.
Post-Removal Treatment
After moldy insulation is out, we inspect the framing for active fungal growth. Surface mold on wood gets treated with a borate-based solution before new insulation goes in. If the moisture source isn’t fixed, new insulation will mold too. We’ll tell you plainly whether you need a roof repair, better bathroom venting, or a dehumidifier before we put anything back.
Trusted Brands We Service in San Francisco
We remove and install insulation from brands San Francisco homeowners can research on their own before saying yes: Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, Demilec, and GreenFiber. For San Francisco’s older housing stock, we often recommend Rockwool mineral wool for its moisture resistance and fire rating, and GreenFiber cellulose for attic blow-in applications in Victorians and Edwardians. We stock common San Francisco sizes and can source specialty material fast, which matters when a building inspector is waiting or a tenant is complaining about damp, musty air in a Richmond district flat.
Common Insulation Removal Problems We See in San Francisco Homes
- Slumped batt insulation in Sunset and Richmond stucco homes. Fiberglass batts installed decades ago settle and slide, leaving empty cavities at the top of walls. Cold spots form, condensation follows, and mold grows behind furniture and picture frames. We find this in roughly half the pre-1980 homes we open up.
- Knob-and-tube wiring buried under DIY fiberglass. Older San Francisco homes still have knob-and-tube circuits. Fiberglass packed tightly around these wires traps heat and creates a fire hazard. Removal around live knob-and-tube requires patience and care, and we coordinate with your electrician when the wiring needs to be decommissioned first.
- Settled cellulose in converted Victorians. Blown-in cellulose from the 1970s and 1980s settles to half its original depth. In multi-unit conversions, that means poor sound dampening between floors and rising heating costs. Removing and replacing it with dense-packed cellulose or mineral wool makes a real difference in tenant comfort.
- Moisture-logged insulation in fog-belt attics. San Francisco’s marine air sneaks through gaps in old roof decking and saturates fiberglass batts. Wet insulation loses almost all its R-value and becomes a mold factory. We remove it, identify the leak or condensation source, and install moisture-resistant material instead.
Pricing for Insulation Removal in San Francisco, CA
Insulation removal in San Francisco runs $1.50 to $3.50 per square foot for standard jobs, with most whole-attic removals falling between $1,800 and $4,200. Moldy insulation removal runs higher, $3.00 to $5.50 per square foot, because of containment and disposal requirements. Access matters a lot here: a steep Victorian roof with a 22-inch square access hatch costs more to work in than a 1960s ranch with pull-down stairs. Multi-story buildings add scaffolding or ladder time. We give free estimates, in writing, before any work starts. Call (559) 245-9792 and we’ll schedule a walkthrough. The number on the estimate is the number on the invoice.
We Also Serve Cities Near San Francisco
Our crews work throughout the Bay Area, including Daly City, South San Francisco, Alameda, and Berkeley. If you’re in one of those cities and dealing with old, damp, or settled insulation, the same Insulation Removal standards apply: written pricing, background-checked crews, and a full year warranty on every job. Our San Francisco scheduling office coordinates all Bay Area appointments, so you’re always talking to someone local.
Serving San Francisco, CA - Our Local Coverage Area
We’re based in the San Francisco 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 Removal in San Francisco
San Francisco’s persistent marine fog keeps attics and wall cavities damp for weeks at a time, which means insulation that looks fine on the surface is often hiding mold underneath. When we remove insulation in fog-belt neighborhoods like the Sunset and Richmond, we routinely find moisture content that would be considered abnormal in Oakland or San Jose. Removal in these conditions requires moisture investigation first, so we know whether we’re dealing with a simple insulation replacement or a mold remediation project before we start. Call (559) 245-9792 and we’ll send a technician out to check moisture levels in your attic.
Yes, in most cases we can remove wall-cavity insulation through existing access points or small, carefully placed openings, leaving the original plaster ceilings and walls intact. Victorian construction in San Francisco uses lathe and plaster, which is fragile. We work from the attic or exterior where possible, and when we do need interior access, we cut clean, minimal openings that are easy to patch. The original plaster is part of what makes these buildings worth preserving.
The most common reason is slumped fiberglass batt insulation from the 1970s and 1980s that has settled to a fraction of its original R-value while leaving cold voids at the top of wall cavities. Those cold spots collect condensation from the ocean air, and mold grows behind beds, dressers, and picture frames. We’ve removed Owens Corning batts from Sunset homes that were so compressed they measured R-8 instead of the R-19 they were installed as. Replacement with Rockwool mineral wool solves both the moisture issue and the performance issue.
If the existing insulation is dry, uncontaminated, and reasonably intact, you can sometimes add new material on top. But in Edwardian homes that have stood since the early 1900s, old insulation is almost never in good shape. It’s settled, it’s dusty, it’s often damp, and it may contain rodent debris or mold. We’ll inspect and tell you honestly whether removal is necessary or whether we can work with what’s there. The inspection is free, and you’ll get a written recommendation either way.
We isolate the affected unit, run negative air pressure to prevent cross-contamination, remove the contaminated insulation in sealed bags, and treat the framing with a borate-based solution before installing new material. In multi-unit San Francisco buildings, this process requires coordination with property managers and often with tenants, because the work area needs to stay sealed off while the removal is in progress. We’ve done this work in buildings from the Richmond to Bernal Heights, and we document the process so owners have a record for insurance and tenant communication. Call (559) 245-9792 for an assessment.
Written by Bryce Holloway, Owner at Alden Insulation San Francisco, serving San Francisco and the Bay Area since 2002.