Johns Manville Insulation Removal & Replacement in Cedar Park: What to Know First
We provide independent Johns Manville insulation removal and replacement in Cedar Park, with most attic jobs completed in one day and pricing set in writing before any work starts. A typical removal and replacement for a 2,000-square-foot home runs between $2,800 and $5,400 depending on contamination level, access difficulty, and whether the attic needs air sealing first. This page is for homeowners who know or suspect they have Johns Manville insulation that needs to come out, whether it’s deteriorated, contaminated, or simply the wrong product for a Central Texas attic. Call (737) 245-6428 to schedule a free estimate with a written price delivered on site.
How Johns Manville Products Fail - and How We Fix Them
- JM Spider blown-in fiberglass - the loose-fill product with the integrated adhesive binder - tends to slump and settle in Cedar Park’s high attic temperatures, creating thin spots near eaves where R-value drops by 30% or more. We remove the compacted material with commercial vacuums, then re-establish proper depth with a fresh install after sealing top plates and penetrations.
- JM Climate Pro batts - the formaldehyde-free fiberglass batts - absorb moisture when attic ventilation is marginal, which is common in Cedar Park homes built 2005-2015 with undersized soffit vents. Wet batts compress, mold, and lose insulating capacity. We strip them out, address the ventilation deficit, and replace with a product suited to the actual conditions.
- Older JM rock wool (MinWool-1200 series) - found in pre-2000 Cedar Park builds, particularly in Ranch at Deer Creek and older Buttercup Creek sections - becomes friable and sheds fibers when disturbed. It’s also denser than fiberglass, so standard vacuums clog. We use high-torque removal equipment with HEPA filtration, then replace with modern blown-in fiberglass or spray foam depending on the envelope condition.
- JM polyiso board (FescoFoam line) - used in cathedral ceilings and some wall assemblies - delaminates at the facer when exposed to sustained 130°F+ attic heat, which Cedar Park attics hit routinely from June through September. The facer separation traps moisture against the roof deck. We remove the compromised boards, inspect the deck for rot, and replace with properly vented assemblies.
- JM formaldehyde-based batts from pre-2010 stock - still present in some Cedar Park attics where original insulation was never upgraded - off-gas as they age, particularly when attic temperatures spike. Homeowners report a sharp, chemical odor on hot days. We remove the material with full PPE and negative-air containment, then replace with current formaldehyde-free product after blower-door testing.
Our Johns Manville Insulation Removal & Replacement Process
- 1
Pre-work blower-door test. We pressurize the house and measure infiltration in CFM50 - the number that tells us how leaky the envelope is before we touch anything. Wes Okafor started doing this after his training at Olive-Harvey College, and we won’t skip it.
- 2
Written price and scope. You get a flat price, written scope, and written warranty before anyone lifts a tool. Haven Standard Clause 1. No exceptions.
- 3
Containment and removal. We seal the attic hatch, set up HEPA-filtered negative air, and remove the Johns Manville product with equipment matched to the material type - high-torque vacuums for rock wool, standard commercial vacuums for blown fiberglass, manual extraction for board products.
- 4
Air sealing before re-insulation. We seal top plates, can lights, plumbing and electrical penetrations, and chase openings. Seal the leaks first. Then insulate. The order matters more than the product.
- 5
Replacement with documented performance. We install the replacement insulation - Johns Manville, Owens Corning, Knauf, or another brand depending on your needs and budget - then run a post-work blower-door test. You get the before-and-after CFM50 numbers, a photo record of the completed work, and your written warranty.
- 6
Cleanup and walkthrough. The crew vacuums the work path, re-installs the attic hatch with proper weatherstripping, and reviews the documentation with you on site.
What Johns Manville Insulation Removal & Replacement Costs in Cedar Park
| Scenario | Typical Range | What Moves the Price |
|---|---|---|
| Standard blown fiberglass removal + replacement, no contamination | $2,800 - $4,200 | Attic square footage, depth required, access difficulty |
| Contaminated insulation (rodent, moisture, mold) | $3,800 - $6,200 | Disposal requirements, sanitization, extent of contamination |
| Rock wool (MinWool-1200) removal + replacement | $3,400 - $5,600 | Density of material, vacuum time, HEPA containment level |
| Polyiso board removal (cathedral ceiling or wall) | $4,200 - $7,800 | Demo scope, deck inspection, ventilation correction needed |
| Vermiculite or pre-1990 unknown material | $5,500 - $9,000+ | Lab testing, abatement protocol, disposal at licensed facility |
Attic air sealing adds $800-$1,800 depending on complexity. We include the pre- and post-work blower-door test at no charge on removal and replacement jobs. Every estimate is free, every price is written, and we offer a free second opinion on any competing written quote. Call (737) 245-6428 for your exact number.
Why Cedar Park Homeowners Call Topside Attic Insulation Cedar Park for Johns Manville Work
We’ve removed and replaced Johns Manville products in Cedar Park since 2016, including full attic jobs in Buttercup Creek where attics routinely read 140°F before we touch them. Our technicians are background-checked, uniformed, and trained on the specific handling requirements of JM rock wool, Spider blown-in, and polyiso board. Every job gets the 365-Day Done Right Promise, a Documented Photo Record, and before-and-after blower-door numbers where applicable. We also service Reflectix and other brands, so we’re not locked into a single manufacturer’s product line - we recommend what performs for your specific envelope. A live person answers calls 24/7 at (737) 245-6428.
FAQs
Original product warranties from Johns Manville cover manufacturing defects, not installation or removal performed by third parties. As an independent Johns Manville service provider, we document the condition of the material before removal with photos and notes, which protects you if a defect claim arises later. For warranty-safe practices, we follow manufacturer handling guidelines for each product line. Call (737) 245-6428 and we’ll review your specific situation.
We source current Johns Manville products through standard distribution channels, along with Owens Corning, Knauf, Rockwool, and other brands. We do not claim exclusive or preferred status with any manufacturer. For replacement jobs, we recommend the product that matches your performance goals and budget, whether that’s JM or another line.
Repair is rarely practical for distributed blown-in or batt products - once fiberglass compresses, gets wet, or sheds binder, spot fixes create uneven thermal layers that show up on infrared cameras. Removal and full replacement is the correct fix in nearly every case we see in Cedar Park. We provide a written price for both approaches when repair is genuinely possible, but we’ll tell you straight if replacement is the only sensible path. Estimates are free - call (737) 245-6428.
Most jobs are scheduled within 3-5 business days, with same-week availability for contaminated insulation that poses an immediate air quality concern. We do not manufacture urgency - we quote honest lead times and stick to them. Under Haven Standard: Arrive on schedule, you get a named technician and a text when they are on the way.
You receive a written scope completion checklist, before-and-after blower-door readings in CFM50 (on applicable jobs), a photo record of the completed work, and your written warranty under the 365-Day Done Right Promise. This is standard on every job, not available on request. You know what leaving looks like before we arrive.
Written by Wes Okafor, Owner, Topside Attic Insulation Cedar Park at Topside Attic Insulation Cedar Park, serving Cedar Park and nearby areas.