Johns Manville Insulation Removal & Replacement in Schertz: What to Know First
We provide independent Johns Manville insulation removal and replacement in Schertz, TX, with most attic jobs completed in one day and a written price delivered before any work starts. Most removal-and-replace projects in Schertz homes run between $2,800 and $5,400 depending on attic square footage, contamination level, and whether the existing material is vermiculite or fiberglass batt. This page is for homeowners who’ve found Johns Manville insulation in their attic, whether it’s failing, contaminated, or simply undersized for our 140°F summer attic conditions, and need a crew that knows the difference between JM Spider and ComfortTherm handling. Call (830) 402-5240 for a free estimate with a written scope.
How Johns Manville Products Fail - and How We Fix Them
- JM Spider loose-fill fiberglass settles below labeled R-value in Schertz’s high-heat attics. The product’s spray-applied bonding agent breaks down faster when attic temperatures regularly exceed 140°F, which we measure in Sedona subdivision homes off FM 1518. We remove the settled material completely and replace with fresh blown-in, but only after blower-door testing and air-sealing the top plates, because Spider’s low density makes it especially vulnerable to wind-washing through gaps.
- ComfortTherm batts lose their encapsulated-film integrity in rodent-contaminated attics. The poly-encapsulated facing tears when rats or squirrels nest, exposing the fiberglass and creating an HVAC contamination risk. We remove all compromised batts, sanitize the deck, and replace with new material, documenting the contamination extent with photos for your records.
- Vermiculite insulation with JM branding requires asbestos testing before disturbance. Johns Manville sourced vermiculite from Libby, Montana through 1990; even bags without Zonolite branding can contain tremolite fibers. We never disturb suspected vermiculite without third-party lab clearance, and we coordinate certified abatement when needed rather than handling it in-house.
- TempControl faced batts delaminate in Schertz’s humidity swings. The kraft facing separates from the fiberglass core when attic humidity cycles between 85% summer peaks and winter dry spells, creating a vapor-barrier failure that traps moisture against the drywall. We remove the delaminated batts and replace with an unfaced solution paired with proper attic ventilation correction.
- Older JM blown-in becomes a fire hazard when buried under recessed can lights. Pre-2005 installations often lack proper IC-rated housings or insulation contact barriers, and Johns Manville fiberglass is not self-extinguishing. We remove material from light penetrations, install proper covers, then replace insulation to safe depth with documented clearance.
Our Johns Manville Insulation Removal & Replacement Process
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Call and schedule. A live person answers 24/7. We book an inspection, not a sales pitch.
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Attic inspection with documentation. We identify your Johns Manville product line, test for contamination, and photograph existing depths and conditions. If it’s vermiculite, we pause for lab testing.
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Blower-door test and air-sealing scope. We pressurize the house to measure envelope leakage in CFM50, then seal top plates, wire penetrations, and can lights before any insulation touches the attic floor.
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Written price before work starts. Under Haven Standard Clause 1, you get a flat price, written scope, and written warranty before anyone lifts a tool. No surprises.
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Removal and replacement. We extract old material with HEPA-contained vacuums, sanitize if needed, and install new insulation to specified depth with depth-stick photo logging.
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Post-work verification. We run a second blower-door test on applicable jobs, provide before-and-after CFM50 readings, and deliver your Documented Photo Record and thermal-imaging summary.
What Johns Manville Insulation Removal & Replacement Costs in Schertz
Most Johns Manville removal-and-replace jobs in Schertz fall in these ranges:
- Standard fiberglass batt removal and replacement (1,200-1,800 sq ft attic): $2,800-$4,200
- Contaminated insulation removal with sanitization (rodent, mold, or smoke): $3,600-$5,400
- Vermiculite removal with certified abatement coordination: $6,500-$11,000 (third-party abatement billed separately)
- Air sealing package added to any removal/replacement: $800-$1,600
What moves the price: attic square footage, accessibility (steep pitch or limited hatch), contamination level requiring PPE and HEPA containment, and whether we find unsealed penetrations that need correction before new insulation goes in. We also service Reflectix radiant barrier systems if your attic has a hybrid install.
Call (830) 402-5240 for a free estimate. We’ll read any written competitor quote with you as part of our Free Second Opinion.
Why Schertz Homeowners Call Topside Attic Insulation Schertz for Johns Manville Work
We’ve been working the Schertz corridor for several years now, and we’ve learned what 140°F attic heat does to Johns Manville products specifically. Wes Okafor built this crew on a sequencing rule he learned at Richard J. Daley College and refined over two decades in attics: seal the leaks first, then insulate. The attic doesn’t care how thick the insulation is if the air is still moving through it.
Every job carries our 365-Day Done Right Promise, backed by a written scope and warranty delivered before work starts. You get background-checked, uniformed technicians, a text when your tech is en route, and a Documented Photo Record when the crew leaves. We source materials from Johns Manville, Owens Corning, Knauf, and others, so we’re not locked into a single product line that might not fit your specific attic condition.
FAQs
Johns Manville’s product warranty covers manufacturing defects, not installation or removal by third parties, so proper removal by a qualified contractor does not void material warranty coverage for replacement product. We document the condition of existing material with photos before removal to support any future warranty claim. Call (830) 402-5240 if you need help interpreting your specific warranty language.
We source Johns Manville materials through standard distribution channels and also use quality equivalent products from Owens Corning, Knauf, and Rockwool when the job specification calls for it or when JM lead times are unreasonable. As an independent Johns Manville service provider, we have no exclusive product lock-in, which means you get the material that actually fits your attic’s condition and your budget. We’ll show you the product data sheets and let you decide.
Spot repair is rarely cost-effective for attic insulation because disturbed material doesn’t blend with new product, and the labor to isolate a section often exceeds full replacement. If your Johns Manville insulation is more than 15 years old, contaminated, or settled below half its original depth, replacement typically delivers better thermal performance per dollar spent. We don’t recommend replacement unless we can show you the blower-door numbers that justify it. Call (830) 402-5240 for a free assessment with written pricing.
Most standard jobs are completed in one day; contaminated or vermiculite jobs may take two to three days depending on testing and containment requirements. We schedule within 48 hours of your call for non-emergency work, and same-day service is available for active HVAC contamination situations. A live person answers calls 24/7 to book your inspection.
You get a written scope of work, before-and-after blower-door test results on applicable jobs, a thermal-imaging summary, depth-stick photo log showing installed insulation depth at multiple attic locations, and a written warranty under our 365-Day Done Right Promise. This is standard on every job, not available on request, because Haven Standard requires that you know what leaving looks like before we arrive.
Written by Wes Okafor, Owner, Topside Attic Insulation Schertz at Topside Attic Insulation Schertz, serving Schertz and nearby areas.