Johns Manville Insulation Removal & Replacement in Mountain View: What to Know First
We provide independent Johns Manville insulation removal and replacement in Mountain View, typically completing attic jobs in one to two days with a written price locked in before any work starts. Most Johns Manville removal and replacement jobs in Mountain View run between $2,800 and $6,400 depending on attic size, contamination level, and whether the existing product is a batt, blown-in, or board insulation that requires full extraction. This page is for homeowners who’ve found Johns Manville insulation in their attic, walls, or crawl space and need it removed safely and replaced with material that performs to current California Title 24 standards. Call (669) 259-0406 for a free estimate with a written price delivered before we schedule.
How Johns Manville Products Fail - and How We Fix Them
- TempControl batts settling below labeled R-value. The formaldehyde-free fiberglass batts in the TempControl line, common in Mountain View’s 1960s-1980s ranch builds, compress over 15-20 years as homeowners store boxes or technicians walk the joists. We remove the compacted material, which often tests at R-19 or lower despite R-30 labeling, then air-seal the top plates and replace with blown-in cellulose or new JM Spider blown fiberglass at proper depth.
- Climate Pro loose-fill turning to concrete in humid crawl spaces. Johns Manville’s Climate Pro blown-in fiberglass, popular in Peninsula retrofits during the 2000s, absorbs moisture when crawl space vapor barriers fail. In Mountain View’s clay-heavy soils near Permanente Creek, we’ve pulled out 6-inch-thick slabs of fused glass fiber that weighed triple their original density. We extract it fully, install a new vapor barrier if needed, then replace with Rockwool Comfortbatt or closed-cell spray foam for moisture resistance.
- AP Foil-faced polyiso board delamination in unvented attics. The AP Foil line’s reflective facing separates from the foam core when attic temperatures spike above 140°F, which happens regularly in Mountain View’s south-facing attics during Santa Ana wind events. The detached facing creates a convection loop that negates the R-value entirely. We remove the degraded boards, verify the roof deck isn’t trapping moisture, then replace with properly vented assemblies using current JM polyiso or transition to spray foam if the roof geometry allows.
- Insul-Safe recycled-content batts contaminated by rodent activity. The gray Insul-Safe batts, recognizable by their darker color from recycled glass content, fragment when rodents nest and leave behind urine-soaked particles that standard vacuums won’t fully capture. We use HEPA-filtered extraction and treat the deck with an enzyme neutralizer before installing new material and rodent-proofing entry points with galvanized mesh.
- Micro-Lok HP Ultra settling in sloped ceiling assemblies. This high-performance blown fiberglass was specified for tight cathedral ceilings in Mountain View’s Eichler-influenced homes, but insufficient baffle ventilation causes it to slump toward the eaves over time. We remove the settled material through carefully cut access points, install proper vent chutes, then re-blow at density to prevent recurrence.
Our Johns Manville Insulation Removal & Replacement Process
- 1
Attic inspection and contamination assessment. We photograph the existing Johns Manville product, note the series if identifiable, test for asbestos if the home predates 1990, and measure the attic with a laser to calculate exact material volume.
- 2
Written price and scope delivered. Under Haven Standard Clause 1, you receive a flat price, written scope, and written warranty before anyone schedules. No work starts without it.
- 3
Air sealing before extraction. Seal the leaks first. The insulation has nowhere to go if the air does. We seal top plates, can lights, plumbing penetrations, and chimney chases at the attic floor before disturbing existing material.
- 4
HEPA extraction and deck cleaning. The Johns Manville product is vacuumed to substrate, not pushed around. We bag it per Alameda County waste guidelines and deliver a Documented Photo Record of the clean deck.
- 5
Replacement and blower-door verification. New insulation goes in at specified depth and density. On applicable jobs, we run before-and-after blower-door tests and publish the ACH50 improvement in your written report.
- 6
Final walk and 365-Day Done Right Promise activation. You review the photo record and test results with the crew lead. The warranty paperwork is in your hand before we leave.
What Johns Manville Insulation Removal & Replacement Costs in Mountain View
| Scenario | Typical Range | What Moves the Price |
|---|---|---|
| Standard attic batt removal + replacement, 1,000 sq ft | $2,800 - $4,200 | Accessibility, joist spacing, whether top plates are accessible for sealing |
| Contaminated insulation removal (rodent/water) + replacement | $4,000 - $6,400 | Extent of contamination, deck treatment needs, vapor barrier replacement |
| Climate Pro or loose-fill extraction + upgrade to spray foam | $5,500 - $9,200 | Foam thickness, roof deck condition, ventilation modifications |
| AP Foil board removal + re-roof assembly | $7,000 - $12,000 | Board area, structural repairs, new ventilation strategy |
These are real ranges from jobs we’ve completed in Mountain View’s Rex Manor, Waverly Park, and Monta Loma neighborhoods. Your written price will be specific to your attic’s square footage, existing product condition, and replacement material. Call (669) 259-0406 for an exact quote - estimates are free.
Why Mountain View Homeowners Call Topside Attic Insulation Mountain View for Johns Manville Work
We’ve been in Mountain View attics since 2016, and we’ve pulled out enough Johns Manville product to know which series were installed when, and why they’re coming out now. Wes Okafor sequences every job the same way: air seal first, insulate second, measure third. The 365-Day Done Right Promise applies to all completed work, and our before-and-after blower-door numbers are published on every applicable job so you can verify the result yourself. We’re also familiar with Reflectix and other reflective insulation systems sometimes found layered over Johns Manville in older Mountain View retrofits, so we don’t treat your attic like a generic cavity. Calls are answered by a live person, 24/7.
FAQs
No - Johns Manville’s product warranties cover manufacturing defects in new material, not the removal of previously installed product. As an independent Johns Manville service provider, we document the condition of existing material with photos before extraction, which protects you if a manufacturing claim ever arises on the original installation. Call (669) 259-0406 if you’d like us to review what warranty paperwork you have.
We typically exceed it. California Title 24 now requires higher R-values than were standard when most Mountain View Johns Manville was installed. We calculate the optimal R-value for your specific assembly - attic, wall, or crawl space - and source replacement material from Johns Manville, Owens Corning, Knauf, or Rockwool depending on which product best achieves the target at your price point. No proprietary lock-in.
Johns Manville manufactured some asbestos-containing products before 1990, though their residential fiberglass batts and blown-in lines were not among them. We test vermiculite and any board insulation from pre-1990 homes before disturbing it, per California OSHA requirements. If asbestos is present, we refer to a licensed abatement contractor and reschedule replacement afterward. The test result becomes part of your Documented Photo Record.
In Mountain View’s climate, removal and replacement is usually the better investment. Compacted or contaminated Johns Manville under new material creates thermal bridges and moisture traps that reduce the effective R-value of the entire assembly. We’ve measured attics in the Cuesta Park area where homeowners added blown-in over settled batts and achieved less than 60% of the labeled performance. A single properly executed removal and replacement avoids the redo.
Most jobs are scheduled within 3-5 business days of estimate approval, with emergency removals for active water intrusion or severe contamination available faster. We don’t manufacture urgency, but we also don’t leave contaminated attics open-ended. Call (669) 259-0406 to check current availability - a live person will answer.
Ready to get a written price for your Johns Manville insulation removal and replacement in Mountain View? Call (669) 259-0406. We’ll read your existing estimate with you if you have one - free second opinion, no obligation.
Written by Wes Okafor, Owner & Lead Insulation Technician, Topside Attic Insulation Mountain View at Topside Attic Insulation Mountain View, serving Mountain View and nearby areas.