Johns Manville Insulation Removal & Replacement Nationwide

Johns Manville Insulation Removal & Replacement in Converse: What to Know First

We provide independent Johns Manville insulation removal and replacement in Converse, with most attic jobs completed in one day and pricing put in writing before any work starts. A typical removal and replacement for a Johns Manville system in a 1,800-square-foot Converse ranch runs between $2,400 and $4,200 depending on contamination level and air-sealing needs. Call (830) 420-0953 for a free written estimate - we publish before-and-after blower-door numbers on every job so you can verify the envelope tightened.

Call (830) 420-0953

This page is for Converse homeowners who have Johns Manville insulation in their attic, walls, or crawl space and need it removed due to age, moisture damage, rodent contamination, or pre-renovation prep. We do not sell Johns Manville products; we remove and replace them as an independent service provider.

How Johns Manville Products Fail - and How We Fix Them

• JM Spider blown-in fiberglass settles below labeled R-value in Converse’s humidity. The loose-fill product relies on synthetic binder to maintain loft, and Bexar County’s summer attic temperatures - routinely 140°F plus - accelerate binder breakdown. We remove the compacted material entirely rather than top it off, then seal top-plate penetrations before installing replacement insulation so the new R-value actually performs.
• JM Climate Pro batts degrade at exterior wall cavities where thermal bridging occurs. The kraft-faced batts trap moisture against sheathing in older Converse homes with inadequate ventilation, particularly in ranch-style construction near Foster Road where soffit intake was never original equipment. We pull the batts, inspect sheathing with infrared, and replace with a system that includes proper vent baffles.
• JM Formaldehyde-free batts attract rodent nesting in attics with unsealed entry points. The plant-based binder smells like food to roof rats common in Converse’s established neighborhoods. We remove contaminated batts under contained conditions, sanitize the substrate, rodent-proof entry points with steel mesh, then reinstall - never over old urine-soaked material.
• JM mineral wool (Roxul-branded lines) becomes waterlogged after roof leaks in flash-storm events. The material itself resists mold, but trapped water against drywall creates a secondary problem. We extract the saturated wool, dry the cavity with directed airflow, document moisture content with a pin meter, and replace only when readings stabilize below 16 percent.
• JM spray foam (JM Corbond line) shrinks at perimeter rim joists in crawl spaces. The closed-cell product can pull away from sill plates during Converse’s clay-soil seasonal heave cycles. We cut away the failed sections, reseal the gap with compatible material, and address the drainage issue that caused the movement - usually a downspout dumping against the foundation.

Our Johns Manville Insulation Removal & Replacement Process

1. 1
   Call and scope. A live person answers, or you text. We schedule a site visit with a named technician. Under Haven Standard: Arrive on schedule, you get a text when they are on the way.
2. 2
   Diagnostics and blower-door baseline. We pressurize the house to 50 pascals and record CFM50 - the number that tells us how much conditioned air is escaping before we touch anything. On a typical Converse home built 1985-2005, we see 3,500-5,000 CFM50 with original Johns Manville insulation intact but unsealed.
3. 3
   Written price before any work starts. Flat price, written scope, written warranty. Haven Standard Clause 1. No exceptions.
4. 4
   Contained removal. Negative-air setup, HEPA filtration, bagged extraction. We document with photos throughout - the customer receives the full record.
5. 5
   Air sealing, then insulation. Top plates, can lights, penetrations, chimney chases. Seal the leaks first. Then insulate. The numbers will tell you if it worked.
6. 6
   Replacement and verification. New insulation installed to labeled depth or density. Final blower-door test. Printed report with before-and-after numbers, photo documentation, and warranty paperwork delivered before the crew leaves.

Before

After

What Johns Manville Insulation Removal & Replacement Costs in Converse

These are real ranges for jobs we’ve completed in the Converse area, not teaser prices:

What moves the price: square footage, contamination level, accessibility (steep roof pitch adds labor), whether asbestos or vermiculite is present, and the extent of air sealing required. We also service Reflectix radiant barrier systems when those are part of the assembly. Every estimate is free, written, and delivered before any work starts. Call (830) 420-0953 to schedule.

Why Converse Homeowners Call Topside Attic Insulation Converse for Johns Manville Work

We’ve removed Johns Manville products from Converse attics since 2016 - from the original Spider installations in Schertz-area subdivisions to the Climate Pro batts in the ranch homes near Foster Road where unsealed top-plate penetrations were bleeding conditioned air for decades. Wes Okafor runs a blower-door test before and after every job, and customers leave with a printed report showing exactly how much the envelope tightened. The 365-Day Done Right Promise applies to all work, and our materials come from multiple manufacturers - Owens Corning, Knauf, Rockwool, CertainTeed, and others - so we’re never pushing a proprietary product. Calls are answered by a live person, 24/7.

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