Johns Manville Insulation Removal in San Francisco: What to Know First
We provide independent Johns Manville insulation removal in San Francisco, typically completing most residential attics in one day. The honest price posture is this: most Johns Manville removal jobs in San Francisco run $1,800 – $4,200 depending on square footage, accessibility, and whether the insulation is fiberglass batts or blown-in. You’ll have a written price in hand before any tools come off the truck, and that number is the number on the invoice.
If you own a San Francisco home with Johns Manville insulation that’s been compromised by rodents, water, or decades of coastal damp, this page covers exactly what’s involved in getting it out and what it should cost. Call (559) 245-9792 for a free estimate. As an independent Johns Manville service provider, we’re not affiliated with or authorized by the manufacturer, but we’ve removed enough of their product from San Francisco attics to know its failure patterns cold.
How Johns Manville Products Fail – and How We Fix Them
Johns Manville has made solid insulation for decades, but no product survives forever. Here’s what we actually see in San Francisco attics, and what we do about it.
- Blown-in fiberglass settling and compaction (Climate Pro, Attic Protector). Johns Manville blown-in fiberglass settles over time, especially in San Francisco’s damp air. What started as R-38 can drop to R-25 or lower within 10 – 15 years. Worse, the settled layer traps moisture against ceiling drywall. We remove the compacted material, check for mold or staining, and the attic is ready for fresh insulation at the correct depth.
- Fiberglass batt saturation in coastal fog zones (ComfortTherm, Kraft-faced R-19/R-30). The Sunset and Richmond districts fight fog year-round, and kraft-faced batts absorb that moisture. Once saturated, the paper facing degrades and the fiberglass mats lose all thermal value. Removal is the only real fix. We also check for hidden roof leaks at the same time, because wet insulation is usually a symptom, not the root problem.
- Rodent and pest contamination in older homes. Victorian and Edwardian attics in San Francisco have gaps that rats and raccoons find easily. Johns Manville fiberglass becomes nesting material fast. Contaminated insulation carries droppings and urine that require full removal and sanitizing, not spot treatment. We remove everything, sanitize the deck, and advise on air sealing before new insulation goes in.
- Spray foam gone wrong (JM Corbond III and open-cell applications). Some San Francisco homes had Johns Manville spray foam installed by contractors who didn’t account for the city’s moisture levels. Improperly applied open-cell foam in an unconditioned attic can hold moisture against roof sheathing. Removal of spray foam is slow, careful work. We cut and scrape it out without damaging the framing or wiring.
- Old formaldehyde-based batts from pre-2000 Johns Manville lines. Homes built before 2000 may still have older Johns Manville fiberglass with formaldehyde binders. Over 25-plus years, those binders break down and off-gas more readily. Homeowners concerned about indoor air quality often choose full removal before switching to modern formaldehyde-free products.
Our Johns Manville Insulation Removal Process
Every Johns Manville removal job in San Francisco follows the same sequence. No surprises, no shortcuts.
- 1
Call and scheduling. You reach a live person, 24/7. We schedule a visit inside a precise window, not a half-day range.
- 2
Attic assessment and written quote. We inspect the insulation type, depth, contamination level, and access. You get a written price before anything is removed. That price does not change at the door.
- 3
Containment and removal. Our background-checked, uniformed technicians seal off the work area, run HEPA-filtered negative air machines, and remove the Johns Manville material by hand or with commercial vacuums sized for attic use.
- 4
Deck inspection and sanitizing. With the insulation gone, we inspect the attic deck for moisture damage, rodent entry points, or wiring issues. We sanitize where needed and flag anything that needs a separate trade.
- 5
Cleanup and disposal. All removed material is bagged, sealed, and hauled away. You won’t find fiberglass dust drifting through the house afterward.
- 6
Written guarantee. Every job carries the 365-Day Done Right Promise. If anything related to the removal fails within a year, we come back and make it right at no charge.
What Johns Manville Insulation Removal Costs in San Francisco
Most San Francisco Johns Manville removal jobs land between $1,800 and $4,200. Here’s the breakdown that drives the number:
- Blown-in fiberglass removal: $1.50 – $2.75 per square foot, including disposal. An 800-square-foot attic typically runs $1,800 – $2,600.
- Fiberglass batt removal: $1.25 – $2.25 per square foot. Batts are faster to pull, but older materials often require more containment.
- Spray foam removal: $3.50 – $6.00 per square foot. This is the most labor-intensive removal we do, and pricing reflects the time and care required.
- Contamination surcharge: Rodent or mold contamination adds $300 – $800 depending on severity. This covers sanitizing and disposal requirements.
What moves the price: attic access (drop stairs vs. a scuttle hole), ceiling height, depth of insulation, and whether we’re dealing with contamination. Call (559) 245-9792 for a free estimate. The number we quote is the number you pay.
Why San Francisco Homeowners Call Alden Insulation San Francisco for Johns Manville Work
We’re part of the Garrison Partners family, established in 2002, and every job at Alden Insulation San Francisco operates under The Garrison Standard: written prices, written guarantees, and a background-checked crew that shows up when we said we would. That Standard is non-negotiable, whether we’re removing Johns Manville fiberglass in a Sunset District Victorian or a Noe Valley bungalow. Bryce Holloway grew up in Los Angeles and picked up his trade fundamentals at Los Angeles Trade-Technical College before spending two decades working insulation jobs from crawl spaces to cathedral ceilings. He and the crew have spent years on older San Francisco homes, and they know how coastal fog affects every insulation brand differently. If your home has Reflectix radiant barrier installed alongside Johns Manville material, we handle that too. When it comes to removal, we’d rather explain what your attic actually needs than upsell you on what it doesn’t.
FAQs
No. Insulation warranties apply to the product, not the removal. Johns Manville does not require you to keep failed insulation in place. Once insulation has been compromised by water, pests, or severe settling, removal is a standard practice and does not affect any warranty on replacement products you install afterward.
Most residential attics are done in one day. Larger homes or severe contamination may take two. Spray foam removal can run two to three days depending on the area. Call (559) 245-9792 and we’ll give you a realistic timeline based on your attic.
That depends on why you’re asking. If the existing insulation is dry, clean, and just underperforming, adding more on top can work. If it’s wet, pest-contaminated, or heavily compacted, adding more masks the problem instead of fixing it. In San Francisco’s fog zones, wet insulation against ceiling drywall leads to staining and mold. Removal is the right call when moisture or pests are involved.
It covers the removal work itself. If anything related to our removal fails within 365 days, in writing, we return at no charge. That includes incomplete removal, damage from our process, or contamination we said we’d address but didn’t. You get a free second visit if the issue is covered.
Yes, with patience and the right tools. We cut and scrape foam off sheathing carefully, working in sections. It’s slow because we prioritize your framing and wiring over speed. In older San Francisco homes with original lumber, that care matters. Good insulation doesn’t announce itself. You just stop noticing the cold. The same applies to good removal: you shouldn’t notice the work after we leave, only that the attic is finally clean.
Get a Free Johns Manville Removal Estimate in San Francisco
If you’re ready to get that Johns Manville insulation out of your attic, call (559) 245-9792. You’ll reach a live person, get a straight assessment, and receive a written price before any work begins. Alden Insulation San Francisco serves homeowners throughout San Francisco and nearby areas with the same discipline on every job: show up on time, do the work right, and stand behind it in writing for a full year.
Written by Bryce Holloway, Owner, Alden Insulation San Francisco at Alden Insulation San Francisco, serving San Francisco and nearby areas.