Johns Manville Attic Cleaning & Rodent Proofing in Seguin: What to Know First
Most Johns Manville attic insulation systems in Seguin homes need cleaning and rodent proofing every 10 to 15 years, and we typically complete the full service in one to two days. As an independent Johns Manville service provider, we publish upfront pricing before any work starts, and our crew documents every job with before-and-after photos plus blower-door readings when air sealing is part of the scope. If you’re finding droppings, compressed batts, or odd smells in a Johns Manville attic, call (830) 549-6646 for a free written estimate. We serve neighborhoods throughout Seguin, including the older builds near Guadalupe Regional Medical Center where JM Spider and Climate Pro products were common in mid-2000s construction.
How Johns Manville Products Fail - and How We Fix Them
- Spider blown-in fiberglass settles around duct boots and top plates. The loose-fill design of Johns Manville Spider is engineered for high coverage, but in Seguin’s variable Hill Country climate, thermal cycling and rodent traffic compress it into valleys, creating bare spots exactly where conditioned air leaks out. We remove the settled material, seal the leaks with foam and caulk, then reinstall to manufacturer depth.
- Climate Pro batts degrade at the paper-faced vapor barrier when rodents nest. The kraft paper backing on Climate Pro batts is a food source and nesting substrate for roof rats and mice common in Seguin’s oak-heavy neighborhoods. We strip contaminated batts, HEPA-vacuum the decking, apply enzymatic sanitizer, and replace with unfaced batts or blown-in where the roofline geometry demands it.
- Formaldehyde-free binder breaks down faster in high-humidity attics. Johns Manville’s bio-based binder resists moisture better than old-glass formulations, but in Seguin homes with bathroom venting into the attic, the binder still degrades, leaving a fine fiberglass dust that circulates through ceiling penetrations. We identify the moisture source, remediate it, then clean and reinstall with proper vent routing.
- AP Foil-faced polyiso boards delaminate at the seams after rodent urine exposure. The foil facing on Johns Manville AP Foil board acts as a vapor barrier, but rodent urine corrodes the adhesive at the seams, creating unsealed gaps that defeat the R-value. We cut out delaminated sections, treat the substrate, and reseal with foil tape rated for the temperature swing Seguin attics see.
- Pre-cut batt sizing misses irregular joist spacing in Seguin’s custom builds. Standard 16- and 24-inch Climate Pro batts gap or compress in the non-standard framing we find in Hill Country homes built between 1990 and 2010. We field-measure each bay and use custom-cut batts or switch to blown-in Spider to eliminate compression and thermal bridging.
Our Johns Manville Attic Cleaning & Rodent Proofing Process
- 1
Written price before arrival. We review photos or visit in person, scope the Johns Manville product type and contamination level, and deliver a flat price with a written scope. No work starts without it.
- 2
Blower-door test and thermal imaging. Wes Okafor runs a pressurization diagnostic to measure air leakage in CFM50, then uses a thermal camera to map exactly where the Johns Manville insulation has failed or been displaced.
- 3
Contaminated material removal and HEPA cleanup. We bag all soiled Johns Manville product, vacuum the deck with HEPA filtration, and apply enzymatic decontaminant to neutralize rodent-borne pathogens.
- 4
Air sealing and rodent exclusion. Before any new insulation goes in, we seal top plates, can lights, plumbing penetrations, and install metal flashing and hardware cloth at entry points. The report goes home with you - the numbers do the talking.
- 5
Reinstallation and documentation. We reinstall to Johns Manville spec depth or switch product lines if the geometry demands it, then photograph every critical detail for your Documented Photo Record.
- 6
Final blower-door test and printed report. On jobs where air sealing is performed, we run the blower door again and hand you a printed pre- and post-installation report with the ACH50 numbers.
Before
AfterWhat Johns Manville Attic Cleaning & Rodent Proofing Costs in Seguin
| Service | Typical Range | What Moves the Price |
|---|---|---|
| Attic cleanout and sanitizing (JM Spider or Climate Pro, up to 1,000 sq ft) | $1,800 - $3,200 | Depth of existing insulation, extent of rodent contamination, accessibility |
| Rodent proofing and exclusion only | $950 - $1,800 | Number of entry points, roof pitch, soffit complexity |
| Full attic restoration (removal, sanitizing, air sealing, reinstall) | $4,500 - $8,500 | Square footage, product line switch needed, blower-door improvement target |
| JM AP Foil board repair/replacement | $650 - $1,400 per section | Board thickness, seam delamination extent, substrate damage |
These are real numbers for Seguin’s market, based on jobs we’ve completed in neighborhoods from Kingsbury to McQueeney. Every estimate is free, written, and binding - no add-ons after we start. Call (830) 549-6646 to schedule.
Why Seguin Homeowners Call Topside Attic Insulation Seguin for Johns Manville Work
We’ve cleaned and restored Johns Manville attics in Seguin since 2016, and we also service Reflectix and other major brands, so we don’t push replacement when repair is the honest call. Wes Okafor learned the building science side of this trade at Triton College in River Grove, IL, and he still runs blower-door tests on jobs where air sealing is part of the scope - most attic contractors in Seguin don’t own the equipment. Our 365-Day Done Right Promise applies to every job, and a live person answers calls 24/7, including weekends. You’ll get a written price before anyone lifts a tool, a named technician, and a text when they’re en route.
FAQs
No, professional cleaning and rodent proofing by an independent service provider does not void Johns Manville’s product warranty, provided the work doesn’t alter the product’s intended application or depth. Using non-compatible materials or compressing batts during reinstallation can create issues, which is why we document original depth and reinstall to spec. Call (830) 549-6646 if you want us to review your warranty terms before we start.
Most single-family jobs finish in one to two days, depending on square footage and whether rodent exclusion requires roof work. Jobs near downtown Seguin with steep pitches or limited attic access sometimes stretch to a third day. We’ll give you a firm schedule in your written scope before we begin.
Repair makes sense when contamination is localized and the fiberglass batt or loose-fill structure is still intact; full replacement is the honest call when binder breakdown, widespread rodent nesting, or moisture damage has compromised more than 40 percent of the coverage area. We don’t sell you product you don’t need. Bring us a competing quote and we’ll give you a free second opinion.
We source Johns Manville Spider, Climate Pro, and AP Foil board through standard distribution channels, and we also use quality aftermarket alternatives when the OEM lead time doesn’t match your schedule or when a different product line solves the problem better. We’ll tell you exactly what we’re installing and why before any material goes in.
Listen for scratching in ceiling voids after dark, check for droppings near attic hatches, and look for compressed insulation trails where rodents have tunneled through Spider loose-fill or pulled apart Climate Pro batts. If you smell ammonia, the colony is active. Call (830) 549-6646 - we’ll inspect, document what we find with photos, and give you a written price for remediation.
Written by Wes Okafor, Owner & Lead Insulation Technician, Topside Attic Insulation Seguin at Topside Attic Insulation Seguin, serving Seguin and nearby areas.