Trusted Insulation Removal & Replacement for San Jose Homeowners
Old, damaged, or contaminated insulation doesn’t just waste energy. It quietly degrades your indoor air quality, invites rodents into your attic, and forces your HVAC system to work harder every single season. Walt’s Insulation has been removing and replacing insulation in San Jose homes since 2000, and we handle the jobs other contractors turn down: rodent-soiled attics, water-damaged crawl spaces, vermiculite that needs careful abatement, and failed DIY attempts. Our background-checked, uniformed technicians arrive when we say they will, and every job is backed by our lifetime Done Right Promise. Call (408) 837-7384 for a free estimate, or read on to see if your home needs this service.
Here’s what San Jose Insulation Removal & Replacement homeowners should know before scheduling insulation removal: we answer the phone live, 24/7. We publish our address and license number. We don’t use subcontractors. And if we remove your old insulation and install the replacement, the workmanship is guaranteed for as long as you own the home. That’s the Done Right Promise, and it’s not a marketing slogan. It’s how Walt Brenner has run this company for over 25 years.
Key Takeaways
- We’ve been removing and replacing insulation in San Jose since 2000 - not a franchise, not a call center.
- Every job is covered by the lifetime Done Right Promise - if it’s not done right, we make it right.
- We handle contaminated insulation safely - rodent droppings, mold, water damage, and vermiculite.
- Free estimates with no trip charge inside Santa Clara County - and a free second opinion on any written estimate.
- Call (408) 837-7384 - a live person answers, day or night.
What Our Insulation Removal & Replacement Service Includes
Insulation removal and replacement isn’t one job. It’s four distinct services, each with its own tools, safety protocols, and timeline. Here’s what each one involves, and when San Jose homeowners actually need it.
Attic Insulation Removal
Attic insulation removal is exactly what it sounds like: we vacuum out the old material - fiberglass batts, blown-in cellulose, rock wool, or whatever’s up there - down to the drywall or plaster. You need this when insulation has been compressed by foot traffic, saturated by a roof leak, or shredded by rodents into something that looks more like a nest than an insulating layer. Walt’s Insulation uses commercial HEPA-filtered vacuum equipment that removes material quickly without spreading dust through your living space. In Insulation Removal & Replacement - Santa Clara County’s older neighborhoods like Willow Glen and Naglee Park, we regularly find attics where insulation from the 1960s has settled to half its original R-value and is doing almost nothing.
Contaminated Insulation Removal
Contaminated insulation removal addresses material that’s been compromised by rodent activity, mold, or water damage. Rodent droppings and urine in attic insulation are a health hazard, not just an odor problem, and mold spores from a slow roof leak circulate through your home’s air. We remove the contaminated material completely, sanitize the affected area, and prepare the space for fresh insulation. Our technicians wear full PPE and use containment procedures so the contamination doesn’t migrate into your living areas during removal. This is the service San Jose homeowners need after discovering a rat infestation in the attic or a leak that went unnoticed for months.
Vermiculite & Old Insulation Removal
Vermiculite insulation is a loose, pebble-like material installed in many San Jose homes built before 1990. Some vermiculite, particularly from the Libby, Montana mine, contains asbestos, and disturbing it without proper precautions can release fibers into the air. We treat every vermiculite removal as potentially hazardous: sealed containment, negative air pressure, and disposal through licensed channels. But vermiculite isn’t the only old insulation we remove - we also handle degraded fiberglass, rock wool, cellulose that’s compacted into uselessness, and any material that’s past its effective service life. If your home was built before the 1990s and you’re not sure what’s in your attic, call us. We’ll inspect it and tell you exactly what you’re dealing with.
Insulation Replacement
Insulation replacement is the second half of the job - installing new material after the old is gone. We recommend and install brands including Owens Corning fiberglass, GreenFiber blown-in cellulose, and Icynene or Demilec spray foam depending on your home’s construction, your budget, and your energy goals. For most San Jose attics, we recommend blown-in cellulose or fiberglass for attic floors and spray foam for attic rafters if you want an unvented attic. Replacement is the stage where you choose the R-value that makes sense for our climate zone - in San Jose, that’s typically R-38 to R-60 for attics, depending on whether you have a standard vented attic or a conditioned space. We don’t upsell. We’ll tell you what we’d put in our own homes and show you the math.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Brands We Service for Insulation Removal & Replacement
Over 25 years, Walt’s Insulation has removed and worked around every type of insulation you’re likely to find in a San Jose home. We’ve pulled out old Owens Corning fiberglass batts that had matted down to nothing in Cambrian Park attics, replaced settled GreenFiber cellulose in Evergreen homes, and removed failed Icynene spray foam jobs in Almaden Valley that were installed incorrectly by contractors who are no longer in business.
When we replace insulation, we install materials from manufacturers we trust: Owens Corning for fiberglass, GreenFiber for blown-in cellulose, and Icynene or Demilec for spray foam applications. Our technicians are trained on the proper installation methods for each brand, not just the generic product category. That matters because GreenFiber cellulose requires different blowing equipment and density settings than fiberglass, and Demilec spray foam has different temperature and humidity requirements than Icynene. Whether you need old insulation removed and replaced with the same brand or you want to switch to something better suited for your home, we can help. And if you inherited an insulation brand we didn’t mention, don’t worry - by the time we remove it, the brand doesn’t matter. We’ll install what’s right for your house.
Signs You Need Insulation Removal & Replacement Right Now
- Your energy bills keep climbing even though rates haven’t changed. When insulation compresses, degrades, or gets wet, its R-value drops fast. That means your furnace and AC run longer to maintain the same temperature. In San Jose’s summer heat and winter chill, degraded attic insulation can cost you hundreds of extra dollars a year.
- You’ve had rodents in the attic - even once. Rats and mice nest in insulation, and they don’t use a litter box. Urine, droppings, and nesting debris contaminate the material and create a persistent odor and health concern. If you’ve trapped or poisoned rodents, the insulation they lived in still needs to come out.
- You see water stains on your ceiling or smell musty air near the attic hatch. A roof leak or condensation problem can soak insulation, compress it, and start mold growth within 48 hours. What looks like a small stain on the ceiling often means a larger problem hiding above it. Wet insulation never dries out properly in an enclosed attic.
- Your home is drafty or rooms upstairs are never comfortable. If one bedroom is always hot in summer or freezing in winter, the insulation above it may be missing, displaced, or never installed correctly in the first place. We see this in San Jose homes of every age - including newer builds where insulation was installed hastily or skipped in hard-to-reach corners.
- Your insulation is older than your mortgage. Insulation doesn’t last forever. Fiberglass and cellulose both degrade over decades, and anything installed before 1990 is likely performing at a fraction of its original specification. If you’ve owned the home for 20 years and never looked in the attic, now is the time to look - and if what you see looks bad, call us.
Our Insulation Removal & Replacement Process - Step by Step
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Inspection and assessment. We start with a full attic or crawl space inspection. We measure existing R-value, identify contamination (rodent droppings, mold, water damage), check for vermiculite, and evaluate your ventilation. You get a clear written report with photos and a specific recommendation - not a vague estimate.
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Containment and protection. Before removing anything, we protect your home. That means sealing off the work area, covering floors and furniture in the path of our equipment, and setting up negative air pressure where contamination is present. Our technicians wear PPE appropriate for the job, including respirators when handling contaminated or potentially asbestos-containing material.
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Removal and disposal. We use commercial HEPA-filtered vacuums to remove old insulation efficiently and completely. Contaminated material is bagged and disposed of according to local and state regulations. Vermiculite gets special handling through licensed hazardous-materials channels if testing indicates asbestos.
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Air sealing and prep. With the space empty, we have access to the top plates, wiring penetrations, and plumbing chases that leak conditioned air into the attic. We air seal these before installing new insulation - because insulation without air sealing is like a down jacket with holes in it. In San Jose, this step alone can reduce energy bills by 10-15%.
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New insulation installation. We install the insulation product that fits your home, whether that’s blown-in fiberglass, cellulose, or spray foam. We measure the final depth and R-value, photograph the finished job, and walk you through what we did. When we leave, your attic is cleaner than we found it - and the new insulation is under the Done Right Promise for life.
How Much Does Insulation Removal & Replacement Cost in San Jose?
A typical attic insulation removal and replacement in San Jose runs $3,500 to $8,500 depending on the size of your attic, the type of insulation being removed, whether contamination is present, and what kind of new insulation you choose - see our Insulation Removal & Replacement cost guide for more detail. Contaminated insulation removal adds cost because of the PPE, containment, and disposal requirements - expect $500 to $1,500 more than a standard removal. Vermiculite removal is the most expensive scenario because of the asbestos testing and special handling, running $8,000 to $15,000 for a standard 1,500-square-foot attic. Here’s a more detailed breakdown:
| Service Component | Typical Range (San Jose) |
|---|---|
| Standard attic insulation removal (1,500 sq ft) | $1,500 - $3,000 |
| Contaminated insulation removal (rodent/mold) | $2,500 - $5,000 |
| Vermiculite removal (with asbestos handling) | $8,000 - $15,000 |
| Blown-in fiberglass replacement (R-38) | $1,800 - $3,500 |
| Blown-in cellulose replacement (R-38) | $2,000 - $4,000 |
| Spray foam replacement (attic rafters) | $5,000 - $12,000 |
What affects the price: attic accessibility, whether you have a finished attic that requires different removal methods, the thickness of existing insulation, and whether we need to address rodent damage or roof leaks before reinstalling. Here’s how to avoid overpaying: get a written estimate that itemizes removal, disposal, air sealing, and installation separately; ask about the specific R-value you’ll get; and don’t accept a quote that doesn’t include a final inspection. Walt’s Insulation gives free estimates with no trip charge inside Santa Clara County, and we offer a free second opinion on any written estimate. If another contractor quoted you already, bring it. We’ll tell you honestly whether it’s fair or inflated.
Insulation Removal & Replacement Near San Jose - Our Service Area
Walt’s Insulation is based right here in San Jose, and we serve the surrounding communities including Campbell, Los Gatos, Monte Sereno, Milpitas, Saratoga, Cupertino, Lexington Hills, and Morgan Hill. Most insulation removal jobs are scheduled within 5 to 7 business days, and we can often accommodate urgent situations like water damage or rodent contamination faster. If you’re in Newark or East Foothills, we cover those areas regularly too - see our Insulation Removal & Replacement in Newark and Insulation Removal & Replacement in East Foothills pages for local details. We’re the one down the road, not a national chain dispatching crews from three counties away.
Serving San Jose, CA - Our Local Coverage Area
We’re based in the San Jose area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions - Insulation Removal & Replacement in San Jose
Insulation removal and replacement is the process of vacuuming out old, damaged, or contaminated insulation from your attic or crawl space and installing new material in its place. It’s typically needed when insulation has been soaked by a leak, infested by rodents, compressed beyond usefulness, or identified as potentially hazardous (like vermiculite). The goal is to restore your home’s thermal barrier and indoor air quality in one comprehensive job. Walt’s Insulation has been doing this work in San Jose since 2000, and we handle everything from inspection to final cleanup.
Most San Jose attic removal and replacement jobs take one to two working days for a standard 1,500-square-foot home. Contaminated insulation removal adds several hours because of the containment setup and sanitation procedures. Vermiculite removal with asbestos handling can take three to five days due to the testing, containment, and disposal requirements. We’ll give you a specific timeline during your free estimate.
A standard attic insulation removal and replacement in San Jose typically costs $3,500 to $8,500 depending on attic size, contamination, and the new insulation type you choose. Contaminated or vermiculite removal costs more due to safety protocols and disposal fees. Every estimate from Walt’s Insulation is itemized so you can see exactly what you’re paying for. Call (408) 837-7384 for an exact quote - estimates are free.
Yes. We’ve removed Owens Corning fiberglass from hundreds of San Jose homes, and we install their blown-in and batt products regularly. We’re also trained on GreenFiber cellulose, Icynene spray foam, and Demilec spray foam installation. Whatever brand you have now - or whatever brand you’re considering - we can remove it, recommend the right replacement, and install it correctly.
If you have water actively leaking into your insulation or you’ve just discovered a rodent infestation, we treat that as urgent and will work to get a crew to your San Jose home as quickly as possible. Call (408) 837-7384 day or night - a live person answers 24/7, not an answering service. We’ll tell you honestly whether it can wait a few days or needs immediate attention.
Every insulation removal and replacement job from Walt’s Insulation is covered by our lifetime Done Right Promise. If the work isn’t done right, we come back and make it right - no charge, no runaround, no fine print. That workmanship guarantee lasts as long as you own the home. Manufacturer warranties on the insulation materials themselves also apply and vary by product.
You don’t need to do much, but here’s what helps: clear a path to the attic access, move valuables away from the area below the attic hatch, and let us know if you have pets that should be kept in a specific room. For contaminated insulation jobs, we’ll ask you to stay out of the attic until we’ve finished. Everything else - floor protection, dust containment, and cleanup - is on us. We leave your home as clean as we found it, and usually cleaner.
Schedule Your Insulation Removal & Replacement Service in San Jose Today
If your insulation is old, wet, infested, or simply not working anymore, the fix starts with a phone call. Walt’s Insulation will inspect your attic, tell you exactly what needs to come out and what should go back in, and give you an itemized, no-obligation estimate - free, with no trip charge inside Santa Clara County. Call (408) 837-7384 now. A live person answers 24/7, and we’ll walk you through the next step. Or browse our home page to learn more about what we do. The one down the road is ready when you are.
Written by Walt Brenner, Owner at Walt’s Insulation, serving San Jose since 2000.