Johns Manville Insulation Removal & Replacement in Inglewood: What to Know First
Johns Manville insulation removal and replacement in Inglewood typically runs $1.50 to $4.25 per square foot depending on access, contamination level, and whether we’re pulling fiberglass batts from an attic or dense-packed material from walls. We’re an independent Johns Manville service provider, which means we can swap out failed or contaminated JM product with whatever best serves your home, whether that’s fresh Johns Manville or an equivalent from Owens Corning, Rockwool, or CertainTeed. Most removal jobs are completed in a single day, with replacement scheduled the same visit when conditions allow.
If you own a home with Johns Manville insulation that’s been compromised by rodents, water, or decades of settling, this page tells you exactly what to expect. Neil Ashford and our crew have pulled failed insulation out of Inglewood attics from Morningside Park to the streets around SoFi Stadium, and we’ve seen how JM products age in this specific coastal inland climate. Call (424) 622-5846 any time, a live person answers, and we’ll give you an honest read on whether removal is even necessary.
How Johns Manville Products Fail - and How We Fix Them
Johns Manville makes solid insulation, but every product line has its weak points, and Inglewood’s particular blend of coastal moisture, summer heat, and older housing stock exposes them predictably. Here’s what we actually see on JM jobs in this city.
- MR® Faced Fiberglass Batts and moisture wicking. The kraft paper facing on JM’s MR line is supposed to act as a vapor retarder, but in Inglewood attics with poor ventilation, that facing traps moisture against the fiberglass. Once the batts sag and the facing peels, you get mold growth and a complete loss of R-value. We remove the entire affected run, treat the decking, and replace with unfaced batts plus a separate vapor barrier where the assembly calls for it.
- ComfortTherm® batts losing their wrap in high-heat attics. ComfortTherm is JM’s encapsulated batt with a poly-wrapped exterior. In Inglewood attics that hit 140°F in August, that wrap gets brittle and tears along the staples. The exposed fiberglass then sheds particles into the air. Homeowners call us complaining of itchy dust around ceiling fixtures. The fix is full removal, air sealing, and reinstall with either fresh ComfortTherm or an unencapsulated batt plus separate air sealing.
- Spider® custom-blown fiberglass settling in wall cavities. JM’s Spider system is blown into open wall cavities before drywall goes up. In older Inglewood homes where it was retrofitted through holes, we often find it settled 30-40% within five years, leaving a cold band at the top of every exterior wall. Removal means cutting access points, vacuuming the cavity completely, and dense-packing with cellulose or fiberglass at proper density.
- Attic Protector® blown-in fiberglass and rodent contamination. This is the loose-fill product we pull out of Inglewood attics more than any other. Rodents love tunneling through it, and once they nest, the material is contaminated with droppings and urine. You can’t spot-clean Attic Protector. We vacuum the entire attic, sanitize, rodent-proof entry points, and blow in fresh material at the correct depth for the R-value you’re targeting.
- Vermiculite-era JM products in pre-1980 Inglewood homes. Johns Manville sold vermiculite insulation under the Zonolite brand for decades. If your Inglewood house predates 1980 and you have a pebbly, mica-like material in the attic, do not disturb it. Vermiculite can contain asbestos. We test first, and if it’s positive, we bring in licensed abatement partners before any JM replacement product goes in. This is a safety line we never cross.
Our Johns Manville Insulation Removal & Replacement Process
Every JM removal job follows the same disciplined sequence. We’ve done this long enough in Inglewood to know that skipping steps just means callbacks, and callbacks violate the promise we make on every job.
- 1
We inspect and test before touching anything. Neil or a senior tech walks the attic or walls, checks for moisture, rodent sign, and vermiculite. We take photos so you see exactly what we saw. If there’s any chance of asbestos, we test before removal starts.
- 2
We seal off the work area. Plastic barriers, negative air pressure where contamination is present, and drop cloths from the access point to the exit. Your home doesn’t become a dust experiment.
- 3
We remove the failed or contaminated JM material. Commercial HEPA-filtered vacuums for blown-in and loose-fill, hand-pulling for batts. Every bit of the old product comes out, including the dust settled on your attic floor joists.
- 4
We air seal and prep the cavity. This is where most contractors cut corners. We seal top plates, wire penetrations, recessed light housings, and any gap where conditioned air escapes. On Johns Manville jobs, this step often matters more than the replacement material itself.
- 5
We install the replacement. Based on your home’s specific need, we blow, dense-pack, or lay the new material, whether that’s fresh Johns Manville product or an equivalent from our other brand partners like Reflectix for radiant barrier applications or Owens Corning for blown-in.
- 6
We test and clean up. We verify depth and coverage, remove all debris, and walk you through what we did. Then the 90-Day Done Right Promise kicks in. If it’s not right, we make it right.
What Johns Manville Insulation Removal & Replacement Costs in Inglewood
Here’s the honest price picture for JM work in Inglewood, based on the jobs we’ve done across the city. These are total project ranges, including labor, disposal, and the replacement material.
- Attic batts removal and replacement (1,200 sq ft attic): $1,500 - $3,400
- Blown-in Attic Protector removal and replacement (1,200 sq ft attic): $2,200 - $4,800
- Rodent-contaminated attic full remediation and reinsulation: $2,800 - $6,500
- Wall cavity dense-pack removal and redense (per wall section): $900 - $1,800
- Vermiculite testing (before any removal): $150 - $400
What moves the price: attic access (scuttle vs. pull-down vs. no interior access), contamination level, whether extra air sealing is needed, and how much disposal the job generates. We give upfront pricing before any work starts, no surprises, and most jobs are completed in a single visit. Call (424) 622-5846 for an exact quote, estimates are free and we’ll tell you honestly if removal can wait.
Why Inglewood Homeowners Call Warmline Insulation Co. for Johns Manville Work
We’ve been doing this in Inglewood and across LA since 2011, and we’ve pulled every generation of Johns Manville product out of attics and walls. Neil Ashford started this company because he spent too many summers in poorly insulated LA houses, and he trained at Los Angeles Trade-Technical College before spending two decades learning what works and what doesn’t across the LA basin. The work should speak for itself, and so should your energy bill.
Every technician we send to your Inglewood home is background-checked and uniformed. We answer the phone with a live person 24/7, not a voicemail tree. And if the JM replacement isn’t right, the 90-Day Done Right Promise means we come back and fix it, in writing, on every job. We’re not affiliated with Johns Manville, which means we can recommend the right product for your home, not just the brand that was there before. That’s also why we keep partners like Reflectix, Owens Corning, Certanteed, and Rockwool on the truck, so the replacement matches the job, not the other way around.
FAQs
No. Once insulation is removed because it’s failed, contaminated, or no longer performing, the original warranty doesn’t apply anyway. Most JM product warranties cover manufacturing defects in the material, not damage from moisture, rodents, or installation failures. As an independent provider, we can note the failure conditions in our inspection report, which can help if you ever pursue a claim through the original installer.
If you’re unsure whether your JM product is in failure or still under warranty, call (424) 622-5846 and we’ll inspect it and tell you straight.
Yes. We’re not tied to any single manufacturer. If Owens Corning or Rockwool performs better for your specific Inglewood home, we’ll recommend that. In many cases, we’ll use fresh Johns Manville product if it’s genuinely the best fit. We stock and work with JM, Owens Corning, Rockwool, CertainTeed, Icynene, Demilec, Knauf, and GreenFiber, so the replacement is a matter of what’s right, not what’s on the shelf that day.
Want to know what we’d recommend for your attic? Call (424) 622-5846 for a free estimate.
Most attic jobs are done in one day. Wall cavity work and full remediation with rodent proofing can stretch to two days. We schedule the removal and replacement as one continuous job, so you’re not living with an open attic for a week. In peak summer or winter, we may be booked a few days out, but we’ll give you a firm date at booking.
Need it done sooner? Call (424) 622-5846 and we’ll check for same-week openings.
Sometimes, but usually not when the old material is compromised. If your JM batts are just settled but dry and clean, topping off with more fiberglass can be cheaper in the short term. But if there’s moisture, rodent activity, or dust coming through the house, adding on top just buries the problem and creates a bigger removal later. We’ll tell you honestly which camp your attic falls into. “The work should speak for itself, and so should your energy bill.”
Not sure if your JM product is salvageable? Call (424) 622-5846 and we’ll inspect it free.
We test first, and we don’t touch it if it comes back positive for asbestos. Warmline works with licensed abatement partners for any confirmed asbestos-containing material. We then handle the reinsulation with your choice of approved product once the space is clear. This is one area where we recommend a trained professional without hesitation. Disturbing old vermiculite without knowing what’s in it is a health risk to your whole household.
Call (424) 622-5846 if you suspect vermiculite in your Inglewood attic. We’ll arrange testing and walk you through the next steps.
Written by Neil Ashford, Owner, Warmline Insulation Co. at Warmline Insulation Co., serving Inglewood and nearby areas.