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

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

Johns Manville insulation removal and replacement in Fullerton typically takes one to two days for most homes, and costs between $1,800 and $4,500 depending on attic size, insulation type, and what we find once we get up there. We’re an independent Johns Manville service provider, which means we work on their products every week but we’re not beholden to corporate pricing or procedures. If you’re in Fullerton and your Johns Manville insulation is wet, compacted, pest-damaged, or just not performing, our team at Walt’s Insulation can assess it, pull it out, and install the right replacement. Call (657) 216-9948 and you’ll get a real person, not a phone tree.

Call (657) 216-9948

This page is for homeowners who already have Johns Manville insulation in their Fullerton home, or inherited it when they bought the place. Whether it’s blown-in fiberglass from the early 2000s, batt insulation stuffed into wall cavities, or spray foam that was never quite right, we’ll walk you through what’s going on and what it takes to fix it. No jargon, no scare tactics, just straight answers from Walt Brenner and the crew who’ve been doing this since 2000.

How Johns Manville Products Fail - and How We Fix Them

Johns Manville makes decent insulation, but like every manufacturer, some products have predictable failure modes here in Fullerton. These are the five we see most often:

• JM ComfortTherm batts losing loft in wall cavities. ComfortTherm batts are wrapped in a plastic facing that’s designed to reduce itch and act as a vapor retarder. The problem is that in Fullerton’s hot, dry summers, that facing can trap moisture inside the cavity when a home has AC running hard and poor exterior drainage. Over time the batt compresses, loses R-value, and sometimes grows mold behind the plastic. We remove the old batts, check the cavity for moisture issues, and replace with the right product for your wall assembly, not just whatever the last guy put in.
• JM Climate Pro blown-in fiberglass settling in attics. Climate Pro is a solid blown-in product, but if it was installed too shallow or without proper air sealing first, it settles. We regularly find attics in Fullerton where Climate Pro installed at R-38 in 2008 is now measuring closer to R-25 because dust, heat cycling, and plain gravity packed it down. The fix is removal with our HEPA-filtered vacuum system, air sealing the attic floor, and blowing in fresh material to the correct depth for Fullerton’s climate zone.
• JM Spider spray-applied fiberglass flaking off rim joists and crawl space walls. Spider is an adhesive-bonded blown fiberglass system that can work well, but it’s sensitive to installation conditions. If the adhesive wasn’t mixed right or was applied to a dusty surface, it doesn’t bond and starts flaking within a couple years. In Fullerton crawl spaces we’ve seen entire sections of Spider insulation sagging and pulling away from the subfloor. Removal requires scraping and vacuuming the area thoroughly before we re-insulate.
• Vermiculite insulation with possible asbestos content, often installed alongside older JM batts. Fullerton has a lot of homes built in the 1950s through the 1970s, and many of those attics contain a mix of old vermiculite and batt insulation from brands that eventually became part of the Johns Manville family. Some vermiculite from that era contained asbestos. We don’t take chances with it. Our crew follows strict containment protocols, and if we see anything that looks like vermiculite, we stop and have it tested before touching anything. This is a safety issue we take seriously.
• JM formaldehyde-free fiberglass batts chewed through by rodents in older Fullerton attics. Rodents don’t care what brand your insulation is. Rats and mice in Fullerton attics chew through kraft facing, make nests in the fiberglass, and leave droppings and urine that make the insulation unsanitary and ineffective. We remove the contaminated material, do full attic cleaning and rodent proofing, and then reinsulate. Trying to skip the cleaning step just gives you R-38 with mouse droppings in it, and nobody wants that.

Our Johns Manville Insulation Removal & Replacement Process

Here’s how a typical Johns Manville removal and replacement job goes with our crew:

1. 1
   You call and talk to a person. Walt or one of our techs answers the phone. We ask what’s going on, what you’re seeing, and when it started. We schedule a visit that works for you, and we show up on time.
2. 2
   We inspect the space and give you a straight assessment. We get into the attic or crawl space, measure current insulation depth, check for moisture, pests, and any signs of contamination. We’ll tell you honestly if removal is needed or if adding material on top makes sense. No upsells.
3. 3
   We give you upfront pricing before any work starts. You get a written estimate with itemized costs. If you have a written estimate from someone else, bring it, we’ll give you a free second opinion on it.
4. 4
   Removal with proper equipment and containment. We use commercial HEPA-filtered vacuum systems and containment protocols to pull out old Johns Manville insulation without spreading dust through your home. For contaminated or vermiculite material, we use sealed bags and proper disposal.
5. 5
   Air sealing, then fresh insulation installed to spec. We seal gaps, cracks, and bypasses where hot Fullerton air leaks into your home, then install the right replacement product, whether that’s Owens Corning, Johns Manville, CertainTeed, or another brand. We match the product to your home, not our supplier’s inventory sheet.
6. 6
   We walk you through the work and back it for life. You see what we did, we show you the before and after, and every job carries our lifetime workmanship guarantee. We do the job right the first time - because we’re the ones who have to stand behind it.

What Johns Manville Insulation Removal & Replacement Costs in Fullerton

Here’s what Fullerton homeowners can expect to pay for common Johns Manville removal and replacement scenarios:

What moves the price: attic size, how difficult access is, whether there’s contamination or pest damage, and what replacement material you choose. Fiberglass blown-in is the most budget-friendly. Spray foam costs more but delivers higher R-value per inch. For an exact quote on your Fullerton home, call (657) 216-9948. Estimates are always free, and if you’re inside our service county, there’s no trip charge.

Why Fullerton Homeowners Call Walt’s Insulation for Johns Manville Work

We’re the one down the road. Walt’s Insulation has been locally owned and owner-operated since 2000, with a published address in the area and a license number you can verify. When you call, a live person answers, 24/7, and that person can actually talk about insulation, not just read a call script. Our technicians are background-checked, uniformed, and they know Johns Manville products because they’ve been pulling them out of Fullerton attics for years. Walt Brenner has been doing this work for two and a half decades, and he’s personally logged more attic hours than he cares to count, from older ranch-style homes near the Fullerton Arboretum to newer builds across town. We’re not tied to one manufacturer, so if Johns Manville isn’t the right product for your replacement, we’ll tell you. We also work with Reflectix, Owens Corning, Rockwool, Knauf, and other brands, and we’ll match the material to the job, not the other way around.

FAQs