Demilec Attic Cleaning & Rodent Proofing in Boerne: What to Know First
We provide independent Demilec attic cleaning and rodent proofing in Boerne, typically completing most jobs same-day or next-day with a written price locked in before any work starts. Most Demilec attic cleanouts and rodent exclusions in the Hill Country run between $1,200 and $3,800 depending on contamination level, accessibility, and whether the Demilec insulation itself requires removal. This page is for Boerne homeowners who found droppings in their attic, noticed compressed or stained Demilec spray foam or open-cell insulation, or were told by another contractor that their Demilec product needs special handling. Call (830) 529-7780 for a free estimate with a written scope delivered before we lift a tool.
How Demilec Products Fail - and How We Fix Them
- Heatlok HFO Pro open-cell compression from rodent tunneling. The low-density structure of Heatlok HFO Pro makes it easy for roof rats and squirrels to burrow through, creating void channels that collapse the foam’s thermal barrier. We remove the contaminated sections, sanitize the substrate, and reinstall with a rigid exclusion barrier before replacing insulation.
- Demilec Sealection 500 moisture retention in Boerne’s humidity swings. Sealection 500 can trap attic moisture during Hill Country spring storms when rodent urine saturates the surface, leading to fungal growth that standard attic cleaning misses. We treat with enzyme-based decontamination, verify dryness with moisture meters, and only reinstall when readings hold below 15% for 48 hours.
- Heatlok XT rodent-gnawed surface degradation. The exposed profile of Heatlok XT in older Boerne ranch attics gives rodents a textured surface to gnaw, creating particulate debris that circulates through HVAC returns. We HEPA-vacuum all degraded material, apply a bittering-agent seal to remaining surfaces, and install physical barriers at penetration points.
- Sealection Agribalance organic contamination staining. The bio-based content in Agribalance can retain organic stains and odors from rodent activity that bleach-based cleaners set rather than remove. We use hydrogen-peroxide-based oxidizers formulated for agricultural foam, then verify with ATP testing before sign-off.
- Demilec closed-to-open-cell transition gaps at chases. Where Demilec contractors mixed closed-cell and open-cell products in Boerne’s 2015-2019 construction boom, rodents exploit the density mismatch at pipe chases and light boxes. We map these transitions with thermal imaging, remove compromised material, and seal with consistent-density replacement matched to the original specification sheet.
Our Demilec Attic Cleaning & Rodent Proofing Process

- 1
Written price and scope before entry. We inspect the attic, identify the Demilec product line from visual cues and density testing, and deliver a flat price with line-item scope. No work starts without your signature.
- 2
Documented photo record of pre-condition. Every square foot is photographed, including close-ups of Demilec product labels where visible, contamination patterns, and rodent entry evidence.
- 3
Containment and HEPA extraction. We isolate the attic space, remove contaminated Demilec material with vacuum systems rated for fine cellulose and foam particulate, and bag for proper disposal per Kendall County waste guidelines.
- 4
Substrate sanitization and structural repair. Enzyme decontamination applied to sheathing and framing, followed by replacement of chewed wiring escutcheons, damaged soffit screens, and gap flashing. OEM Demilec replacement foam or compatible aftermarket installed per the original specification.
- 5
Rodent exclusion and pressure verification. All entry points sealed with steel mesh, copper flashing, or concrete patch depending on substrate. Where the original job included blower-door data, we re-test and publish the new number. Where it didn’t, we establish a baseline for future comparison.
- 6
Final documentation and 365-Day Done Right Promise. You receive the photo record, written warranty, and any pressure-differential readings. Under Haven Standard: if it’s not done right, we make it right.
What Demilec Attic Cleaning & Rodent Proofing Costs in Boerne
| Scenario | Typical Range | What Moves the Price |
|---|---|---|
| Light cleanout, no insulation removal, spot exclusion | $1,200 - $1,800 | Attic square footage, number of entry points, accessibility (truss vs. rafter) |
| Moderate contamination, partial Demilec removal, full exclusion | $2,100 - $2,900 | Foam density (open-cell removes faster than closed-cell), HVAC duct proximity, electrical remediation needed |
| Heavy contamination, full Demilec removal, structural sanitization, reinstallation | $3,200 - $3,800+ | Total board feet of Demilec installed, replacement product specification, Boerne permit if structural repair exceeds 32 sq ft |
Travel in Boerne proper is included; properties north of Scenic Loop Road or with limited attic hatch access may carry a modest access adjustment, disclosed in the written price. Call (830) 529-7780 for an exact quote - estimates are free, and we provide a Free Second Opinion on any written estimate you’ve already received.
Why Boerne Homeowners Call Topside Attic Insulation Boerne for Demilec Work

We’ve worked Demilec products across the Hill Country since 2016, including a stretch of older homes near the Cibolo Nature Center where stack-effect air leakage was compounding rodent entry before a single batt went in. Wes Okafor runs blower-door tests on applicable jobs and hands homeowners printed pressure-differential reports in pascals so the numbers are on paper. Our crews carry replacement materials from Demilec, Owens Corning, Johns Manville, Knauf, Rockwool, CertainTeed, Icynene, and GreenFiber - no proprietary lock-in means we specify what’s right for your attic, not what moves our inventory. The 365-Day Done Right Promise applies to all completed work. Calls are answered by a live person 24/7, and our technicians are background-checked and uniformed. We also service Reflectix radiant barrier systems where those were installed in conjunction with Demilec foam.
Seal the envelope first. Then fill it.
FAQs
No - Demilec’s product warranty covers material defect, not maintenance or damage remediation, so professional cleaning and rodent-related repairs don’t void coverage. We document the original product label and installation date where visible, and our replacement foam meets or exceeds the original specification. Call (830) 529-7780 if you need help locating your original installation paperwork.
We source OEM Demilec products when the specification demands it and use quality aftermarket equivalents from our multi-brand inventory when the performance characteristics match. As an independent Demilec service provider, we’re not locked to factory parts, which means we choose based on your attic’s condition and your written scope, not a supply contract.
Replace when contamination has penetrated beyond the surface, when moisture readings stay above 15% after 48 hours of ventilation, or when rodent tunneling has compromised more than 30% of the installed volume. Repair when damage is surface-level, localized, and the substrate is sound. We make this determination during inspection and put the rationale in writing before you decide.
Most Demilec attic cleaning and rodent proofing calls in Boerne are scheduled within 24-48 hours, with same-day availability for active infestations where HVAC contamination is suspected. You’ll get a text when your technician is en route with a named arrival window. Call (830) 529-7780 to check today’s availability.
Typically no - our containment and ventilation protocols keep living spaces isolated during work. We do recommend vacating for 4-6 hours after reinstallation of spray foam products to allow full cure, and we’ll tell you exactly when it’s safe to return based on temperature and humidity readings that day.
Written by Wes Okafor, Owner, Topside Attic Insulation Boerne at Topside Attic Insulation Boerne, serving Boerne and nearby areas.