Johns Manville Insulation Removal & Replacement in Glendale: What to Know First
We provide independent Johns Manville insulation removal and replacement in Glendale, typically completing attic jobs in one day and crawl space work in one to two days depending on contamination level and access. Most homeowners receive a written price before we schedule the work, and we do not start without one. This page is for Glendale owners who have Johns Manville insulation that has settled below grade, been compromised by rodents or moisture, or contains vermiculite that needs tested and removed per California code. Call (213) 474-3828 for a free estimate and a written scope.
How Johns Manville Products Fail - and How We Fix Them
- TempControl Formaldehyde-free batts in pre-2010 Glendale ranches - the kraft facing on these batts delaminates when attic temperatures exceed 140°F, which happens regularly in Glendale’s inland valley heat during August and September. The facing separates from the fiberglass, creating a loose vapor barrier that traps moisture against drywall. We remove the degraded facing entirely, air seal the top plates and penetrations, then replace with unfaced JM Spider or a comparable blown-in system that performs without a separate facing.
- Climate Pro loose-fill in homes near the Verdugo Mountains - the fine-denier fiberglass settles faster in homes with significant stack effect, common in two-story Glendale builds with balloon framing. After ten to fifteen years, the settled R-value drops to roughly half the labeled performance. We vacuum the compacted material, document the depth with photos, and reinstall to a calculated depth that accounts for settling over the warranty period.
- JM AP Foil-faced polyiso board in garage ceiling and knee-wall applications - the foil facing corrodes where Glendale’s occasional heavy winter rains leak through stucco or roof penetrations. Once the facing oxidizes, the board loses its radiant barrier properties and can harbor mold on the paper backing. We remove the contaminated boards, treat the substrate with an antimicrobial, and replace with fresh foil-faced product only after the leak source is resolved and documented.
- Vermiculite insulation in Glendale homes built 1945-1984 - Johns Manville sourced vermiculite from the Libby, Montana mine during this period, and any vermiculite in a Glendale home of this vintage must be presumed asbestos-containing per EPA guidance until tested negative. We coordinate third-party lab sampling, and if positive, our removal follows Cal/OSHA Class III asbestos work practice standards with negative air machines and HEPA filtration. This is not a DIY job.
- Insul-Safe blowing wool in homes with active rodent activity - the product itself does not fail, but its fine texture makes it nearly impossible to clean after rodent infestation. Urine saturates the glass fibers and the scent attracts return visitors. We remove the contaminated material entirely, sanitize the attic deck, rodent-proof with steel mesh at all penetration points, then reinstall with fresh material. Seal the bypasses first. Insulation over air leaks is just expensive noise reduction.
Our Johns Manville Insulation Removal & Replacement Process
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Call and scheduling. A live person answers 24/7. We book a site visit, and you receive a text with the technician’s name when they are en route.
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Attic or crawl space inspection with documentation. We photograph existing Johns Manville product labels, depth measurements, and any damage. If the home was built 1945-1984, we flag vermiculite for lab testing before disturbing anything.
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Blower-door test before work begins. We pressurize the house to measure CFM50 - the rate of conditioned air escaping through the envelope. This establishes the baseline. In a typical 1,800 square foot Glendale ranch, we often see 3,500 to 4,500 CFM50 before any work.
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Air sealing first, then removal. We seal top plates, wire and pipe penetrations, can light housings, and chimney chases with fire-rated caulk and rigid foam. Only after sealing do we vacuum out the old Johns Manville material with commercial HEPA-equipped removal machines.
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Replacement and verification. We install new insulation to the specified depth and R-value, then run a second blower-door test. You receive a printed report with pre- and post-installation ACH50 numbers, the documented photo record, and the written warranty. No work closes without it.
Before
AfterWhat Johns Manville Insulation Removal & Replacement Costs in Glendale
Most attic removal and replacement jobs in Glendale run between $2.80 and $4.20 per square foot, with the final price driven by four factors: square footage, contamination level (rodent, moisture, or asbestos-positive vermiculite), access difficulty (steep roof pitch, tight scuttle, or no permanent access), and whether air sealing is included. A clean 1,200 square foot attic with standard access and no contamination typically falls between $3,400 and $5,000. Vermiculite removal with asbestos abatement coordination runs $8 to $14 per square foot due to third-party lab costs, negative air setup, and disposal at a licensed California facility. Crawl space jobs start around $3,200 for similar footage but increase if vapor barrier replacement or joist repair is needed. We also service Reflectix radiant barrier systems when those are part of the same envelope upgrade. Every estimate is a written price before any work starts - Haven Standard Clause 1 - and we provide a free second opinion on any competing written quote. Call (213) 474-3828 for an exact figure on your specific job.
Why Glendale Homeowners Call Topside Attic Insulation Glendale for Johns Manville Work
We are an independent Johns Manville service provider, not a manufacturer-authorized dealer, which means we select materials based on what the house actually needs rather than what a single brand’s catalog offers. Wes Okafor has been running blower-door tests on Glendale homes for years, including the older ranch-style properties near Verdugo Woodlands where dense-pack cellulose in balloon-frame walls is still the right call after the old JM batts come out. Our crew is background-checked and uniformed, and every job carries the 365-Day Done Right Promise: if it’s not done right, we make it right, backed by a written scope and warranty delivered before anyone starts. We have completed over 9,000 homes since 2016, every one with a written price first and a documented record at completion. Materials come from Johns Manville, Owens Corning, Knauf, Rockwool, and other manufacturers - no proprietary lock-in, no upsell pressure.
FAQs
Johns Manville’s product warranty covers defects in manufacturing, not installation or removal by a third party. Since we are an independent service provider and not affiliated with Johns Manville, any remaining material warranty on the original product would need to be filed directly with JM by the homeowner. We document the product label and installation date before removal so you have that record if you choose to pursue a claim. For warranty-safe practices on the replacement side, we install to manufacturer-specified depths and densities, which preserves any new-product warranty that applies. Call (213) 474-3828 if you want us to review your specific product line and documentation.
Standard JM products - Spider blown-in, Climate Pro loose-fill, TempControl batts - are available through regional distributors in Los Angeles County with next-day or two-day lead times. Specialty items like AP Foil-faced polyiso in thicker dimensions sometimes require a week. We do not start demolition until materials are confirmed on-site, so scheduling accounts for realistic lead times rather than promising a start date we cannot keep. If a Johns Manville product is backordered, we will quote an equivalent from Owens Corning, Knauf, or Rockwool with your approval rather than delay the job indefinitely.
Spot repair is rarely cost-effective once fiberglass is contaminated with rodent urine, moisture, or mold. The labor to isolate, remove, and patch a section often approaches the cost of full removal, and the result is a patchwork with inconsistent R-value and no unified air barrier. We recommend full removal when contamination exceeds roughly 15% of the attic or crawl space area, or when the existing material has settled more than 25% below its labeled depth. For clean, recently installed product that was simply displaced by a single leak source, localized repair may make sense, and we will say so. Call (213) 474-3828 for an honest assessment - estimates are free.
Standard attic removals with no contamination are typically scheduled within three to five business days. Vermiculite or asbestos-positive jobs require a ten-day notification to Cal/OSHA before work begins, plus lab turnaround of two to three business days for sampling results. We do not expedite safety compliance to hit an arbitrary start date. Once scheduled, most attic jobs finish in one day; crawl space work with vapor barrier replacement typically takes two. You will receive a written price before the work is scheduled, not after we arrive.
You receive four items: a written invoice with line-item breakdown, a Documented Photo Record of before, during, and after conditions, the printed blower-door test report with pre- and post-installation CFM50 and ACH50 figures, and the written warranty under the 365-Day Done Right Promise. These are delivered at job completion, not available on request later. Haven Standard: have it in writing.
Written by Wes Okafor, Owner, Topside Attic Insulation Glendale at Topside Attic Insulation Glendale, serving Glendale and nearby areas.