Johns Manville Insulation Removal & Replacement in New Braunfels: What to Know First
We provide independent Johns Manville insulation removal and replacement in New Braunfels, typically completing residential jobs in one to two days with a written price locked before any work starts. Most attic insulation removals in the area run between $1,800 and $3,400 depending on contamination level and square footage, with replacement adding $2.20 to $4.10 per square foot for blown-in fiberglass. This page is for homeowners who’ve found Johns Manville products in their attic, whether it’s original construction insulation, a prior retrofit, or material you’re replacing after rodent damage, water intrusion, or age-related settling. Call (830) 243-6352 for a free estimate with a written scope.
How Johns Manville Products Fail - and How We Fix Them
- JM Spider Custom Insulation settling in River Road corridor homes. We see this blown-in fiberglass system compressed to 50-60% of its labeled R-value in older slab homes near the Guadalupe, where stack-effect pressure pulls conditioned air upward faster than the binder was designed to resist. We remove the settled material entirely, seal top plates and can-light penetrations with fire-rated foam and gasketed covers, then reinstall to manufacturer depth with fresh JM or equivalent blown-in.
- TempControl batts degraded by roof leaks in New Braunfels’ spring storm season. These faced fiberglass batts hold moisture against drywall when the kraft paper vapor retarder traps water from intermittent leaks. The paper delaminates, mold follows, and R-value drops to near-zero in the affected cavity. We cut out contaminated sections, treat framing with antimicrobial, and replace with unfaced batts or blown-in that lets the assembly breathe properly for this climate.
- Formaldehyde-free batts from the 2012-2018 production window shedding fibers. Early runs of JM’s formaldehyde-free binder could become brittle in attics cycling above 140°F, which happens regularly in New Braunfels from June through September. The batt face breaks down and fibers migrate into living spaces through recessed light housings and unsealed top plates. We remove the degraded material, HEPA-vacuum the attic deck, and reinstall with current-formulation JM or Knauf EcoBatt.
- AP Foil-Faced Polyiso board separation in metal building retrofits. The foil facing on this rigid board can delaminate when installed directly against purlins without the specified air gap, creating a convection loop that negates the stated R-value. We remove separated boards, install proper baffles or standoffs, and replace with intact AP Foil-Faced or switch to Rockwool Comfortboard where fire rating is the priority.
- Vermiculite insulation misidentified as JM loose-fill in pre-1990 homes. Some New Braunfels subdivisions built during the 1980s oil boom used vermiculite that homeowners assume is standard fiberglass. It’s not a Johns Manville product, but we test every suspicious granular material for asbestos before disturbing it. If positive, we coordinate licensed abatement; if negative, we proceed with full removal and modern replacement.
Our Johns Manville Insulation Removal & Replacement Process
- 1
Attic inspection and material identification. We photograph the existing Johns Manville product, note the series and installation date if visible, and test for moisture content in the decking and insulation bulk.
- 2
Blower-door baseline test. We run a pressurization diagnostic - measuring CFM50, or cubic feet of air leakage per minute at 50 pascals of pressure - to document how much conditioned air the home loses before we touch anything.
- 3
Written scope and price. Under Haven Standard Clause 1, you get a flat price, written scope, and written warranty before anyone lifts a tool. No exceptions.
- 4
Air sealing before insulation touch. We seal top plates, wire penetrations, can lights, and chimney chases with fire-rated foam, caulk, and gasketed covers. We do not blow new insulation over an unsealed attic floor.
- 5
Removal, disposal, and deck prep. Contaminated or degraded JM material is bagged and hauled. We HEPA-vacuum the attic deck, treat for mold or rodent evidence if found, and photograph the cleaned space.
- 6
Replacement install and blower-door verification. New insulation goes in to specified depth or R-value. We run the blower-door again and hand you printed pre- and post-job numbers. The number on the blower-door printout tells you what the insulation did. Everything else is just talk.
Before
AfterWhat Johns Manville Insulation Removal & Replacement Costs in New Braunfels
| Scenario | Typical Range |
|---|---|
| Standard attic removal (1,200-1,800 sq ft, no contamination) | $1,800 – $2,800 |
| Contaminated removal (rodent, mold, water damage) | $2,600 – $4,200 |
| Vermiculite testing + removal if clear | $3,200 – $5,500 |
| Replacement blown-in fiberglass (per sq ft installed) | $2.20 – $3.40 |
| Replacement spray foam (open cell, per sq ft) | $3.80 – $5.60 |
| Air sealing package (typical 1,500 sq ft home) | $1,400 – $2,600 |
Price movers: attic square footage, accessibility (scuttle vs. pull-down stairs), contamination level requiring PPE and specialized disposal, and whether the job includes air sealing or goes straight to replacement. We also source from Owens Corning, Knauf, Rockwool, CertainTeed, and others - no proprietary lock-in means we specify what performs, not what moves inventory. Call (830) 243-6352 for a written price; estimates are free.
Why New Braunfels Homeowners Call Topside Attic Insulation New Braunfels for Johns Manville Work
We’ve removed and replaced Johns Manville products in neighborhoods from Downtown New Braunfels to the Hill Country fringe off FM 306, and we keep current binder formulations and facing specifications on file so we’re not guessing what went into your attic. Wes Okafor runs a blower-door test before and after every applicable job - pre- and post-job readings printed and filed by address, which has settled more than one real-estate inspection dispute. The 365-Day Done Right Promise applies to all completed work. Calls are answered by a live person 24/7. We also service Reflectix and other brands, so if your attic has mixed materials from multiple retrofits, we handle it without subcontracting or confusion.
FAQs
Original product warranties cover defects in material, not removal or reinstallation by a third party. As an independent Johns Manville service provider, we document the existing product condition with photos before removal, which preserves any legitimate material defect claim you might have with JM directly. If you’re concerned about a specific warranty issue, bring your paperwork and we’ll review it during the estimate. Call (830) 243-6352 to schedule.
Most residential jobs in New Braunfels finish in one to two days: half a day for removal and deck prep, half a day for air sealing and replacement install, with blower-door verification at the end. Contaminated jobs requiring antimicrobial treatment or vermiculite testing add a day. We don’t quote turnaround without seeing the attic first. Call for a free estimate with a written timeline.
Repair only makes sense for localized damage in otherwise intact material less than 10 years old. If the product is settled below labeled depth, contaminated, or installed before 2012, removal and replacement returns the attic to spec and gives you a documented clean start. We don’t patch over material we’d be embarrassed to put our blower-door numbers on. Call (830) 243-6352 and we’ll show you what we found in your specific attic.
Can you match my existing Johns Manville product exactly?
We can source current JM formulations including Spider Custom Insulation and TempControl batts, but we won’t install discontinued binders or facing types that have known degradation issues. If your existing product is obsolete, we’ll specify the closest-performing current equivalent and explain the difference in the written scope. No work starts until you approve the material list. Call for a free second opinion on any competing quote.
You receive a written scope completion checklist, before-and-after photos of the attic deck and installed insulation, and printed blower-door pre- and post-job readings on applicable jobs. This is the Documented Photo Record included on every visit, not available on request - it’s standard. If you sell the home or an inspector asks questions, you have the file. Haven Standard: Have it in writing.
Written by Wes Okafor, Owner, Topside Attic Insulation New Braunfels at Topside Attic Insulation New Braunfels, serving New Braunfels and nearby areas.