Johns Manville Insulation Removal & Replacement Nationwide | Walt’s Insulation

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

Johns Manville insulation removal and replacement in Mission Viejo typically runs $1,800 to $4,600 for a full attic, with most jobs completed in one to two days. That’s the honest range we quote homeowners across Orange County, and it’s what you’ll see on the written estimate we hand you before any work begins. If you own a Johns Manville product and it’s failing, contaminated, or just not performing the way it used to, this page covers exactly what we do, why we do it that way, and what it costs.

Call (949) 528-8707

We’re Walt’s Insulation, an independent Johns Manville service provider based right in the area. We’ve been pulling old insulation out of Mission Viejo attics since 2000, and we answer the phone live when you call (949) 528-8707.

• Typical full-attic removal and replacement: $1,800-$4,600, done in 1-2 days
• Contaminated or pest-damaged removal: $2,200-$5,000 depending on severity and attic access
• Johns Manville batt replacement (spot or partial): $400-$1,200 per section
• Free written estimate, no trip charge inside the county, lifetime workmanship guarantee

How Johns Manville Products Fail, and How We Fix Them

Johns Manville makes solid insulation, no question. But every product line has failure modes, and after 25 years in Mission Viejo attics, we know exactly what to look for. Here’s what we see and how we handle it:

• Johns Manville ComfortTherm batts losing R-value from moisture wicking. In older Mission Viejo homes near Lake Mission Viejo, we regularly see fiberglass batts that have absorbed humidity over years of coastal-adjacent air. The kraft facing traps moisture, the batts compress, and R-30 becomes R-19 in practice. We remove the compromised sections and replace them with dry, properly fitted Johns Manville or Rockwool batts sized to the actual joist spacing, not what the original builder guessed.
• Johns Manville Attic Protector blown-in fiberglass settling below code minimums. Blown fiberglass can settle up to 20% over a decade, and in Mission Viejo’s dry heat cycles, we find attics with 6 inches of insulation where the bag said 12. We vacuum it out fully, air-seal the attic floor, and blow in fresh material to current R-38 or R-49 depth, depending on what the home’s climate zone actually needs.
• Rodent-nested Johns Manville blown-in insulation in tract homes. Mission Viejo’s older developments have plenty of roof-vent gaps, and rats find them. Once they nest in blown-in fiberglass, the material is contaminated with urine and droppings, and no amount of topping it off fixes that. We remove everything, sanitize the attic decking, rodent-proof the entry points, and install fresh insulation. This is a full remediation job, not a patch.
• Johns Manville Spider custom spray fiberglass failing around can lights and penetrations. Spider is a good product when installed right, but we’ve pulled it out of homes where it was sprayed too thin around recessed fixtures. The result is air leakage that defeats the R-value. When we replace it, we re-insulate with proper baffling and air-sealing around every penetration before any new material goes in.
• Vermiculite insulation that owners thought was Johns Manville product. Here’s the thing no one tells you: Johns Manville never manufactured vermiculite. But we get calls from Mission Viejo homeowners who were told by a previous contractor or home inspector that their vermiculite is “JM insulation.” It isn’t. If you have vermiculite in your attic, it may contain asbestos, and it needs tested before anyone touches it. We coordinate that testing and handle removal by the book in Mission Viejo, not with a Shop-Vac and a prayer.

Our Johns Manville Insulation Removal & Replacement Process

Every job follows the same six steps, whether it’s a 1970s tract house near Trabuco Road or a lakefront property off Marguerite Parkway. You’ll know exactly what’s happening from the first phone call to the final walkthrough.

1. 1
   Call and talk to a person. You reach Walt’s Insulation directly at (949) 528-8707. We ask about your home’s age, attic access, and what you’re seeing or smelling. We answer the phone live. Always have.
2. 2
   On-site inspection and free estimate. We come out, suit up, and actually go into the attic. We measure existing depth, identify the material (Johns Manville batt? blown fiberglass? spray foam? something else?), and check for moisture, pests, and air leaks. You get a written quote with a clear scope of work.
3. 3
   Removal and prep. We use commercial HEPA-filtered vacuums for loose-fill and hand-removal for batts and foam. We bag everything and haul it off. We don’t leave a dumpster in your driveway for two weeks.
4. 4
   Air sealing and any needed repairs. Before new insulation goes in, we seal top plates, wire penetrations, plumbing stacks, and can-light gaps. This step is what makes the new insulation actually work in Mission Viejo summers.
5. 5
   Fresh insulation installation. We install new Johns Manville, Owens Corning, Rockwool, or whichever material fits your home, budget, and performance goals. We name the materials on the estimate, so you know exactly what you’re paying for.
6. 6
   Final inspection and cleanup. We show you photos of the finished attic, vacuum up every stray fiber from the hallways, and walk you through what changed. Every job is backed by the Done Right Promise, and we mean it.

What Johns Manville Insulation Removal & Replacement Costs in Mission Viejo

Prices move based on three things: attic size, material condition, and access. Most Mission Viejo homes land in the ranges below.

• Full attic removal and replacement (blown-in fiberglass, R-38): $1,800-$3,200 for a 1,200-1,800 sq ft home
• Full attic removal and replacement (batt or spray foam, R-38-R-49): $2,800-$4,600 depending on material and joist configuration
• Contaminated insulation removal with sanitization and rodent proofing: $2,200-$5,000; rodent jobs vary because entry points vary
• Partial or spot replacement (single section, batt or blown): $400-$1,200
• Vermiculite testing and removal: priced per job after testing; do not disturb vermiculite until it’s tested

Two attics, same square footage, can price $1,000 apart. If the material is packed with dust, old rodent activity, or compressed from decades of storage boxes, removal takes longer. If your attic access is a small hatch in a closet, we work slower and more carefully. Every estimate is itemized. No surprise line items. Call (949) 528-8707 and we’ll give you a real number, not a guess. And if you already have a written quote from another company, bring it, we’ll give you a free second opinion on it.

Why Mission Viejo Homeowners Call Walt’s Insulation for Johns Manville Work

We’re the one down the road. Walt Brenner started this company in 2000 and has been pulling failed insulation out of Orange County attics ever since. He grew up in San Antonio and learned the trade at St. Philip’s College before heading west, and he’s spent the better part of two decades working in Mission Viejo homes, including older builds near Lake Mission Viejo where drafty attics and outdated batt insulation are practically a rite of passage. Our techs are background-checked and uniformed, and they know Johns Manville product lines well enough to tell you when removal makes sense and when you’d be better off leaving it alone. We also service other brands including Reflectix, so if your home has a mix of materials, we handle it in one visit, not three. Every job is covered by the Done Right Promise: if it’s not done right, we make it right. No runaround, no fine print. You get a real address, a real license number, and a real person on the phone at 3 a.m. if that’s when you call.

Frequently Asked Questions