Demilec Attic Cleaning & Rodent Proofing in Cedar Park: What to Know First
We provide independent Demilec attic cleaning and rodent proofing in Cedar Park, with most jobs completed in one to two days and a written price delivered before any work starts. As an independent Demilec service provider, we are not affiliated with or authorized by Demilec - we service what they built using warranty-safe practices and documented photo records. Most Cedar Park homeowners with Demilec spray foam in their attics will see cleaning and rodent proofing run between $1,800 and $4,200 depending on contamination level and access complexity. Call (737) 245-6428 for a free written estimate with no obligation to book.
This page is for homeowners in Cedar Park, Leander, and the Buttercup Creek area who have Demilec open-cell or closed-cell foam in their attics and are dealing with rodent damage, soiled insulation, or the ammonia-heavy odor that follows a colony. If your HVAC tech just handed you a photo of droppings on your Demilec SEALECTION 500 or Heatlok HFO Pro, you’re in the right place.
How Demilec Products Fail - and How We Fix Them
- Heatlok HFO Pro - rodent tunneling at foam-to-wood interfaces. The closed-cell density of Heatlok HFO Pro (2.0-2.2 lbs/ft³) resists compression but creates a hard surface rodents grip with their teeth, not chew through. In Cedar Park attics, we see them burrow along the perimeter where foam meets rafter tails, creating galleries that compromise the air seal. We cut back the damaged section, treat the wood with an enzymatic cleaner, reinstall with Demilec-compatible expanding sealant, and proof the gap with 26-gauge galvanized flashing.
- SEALECTION 500 - moisture retention in open-cell after rodent urine saturation. SEALECTION 500’s 0.5 lb/ft³ open-cell structure wicks fluid like a sponge. Once rodents establish latrine sites, the foam holds ammonia and organic material that standard cleaning won’t reach. We remove the saturated foam entirely - partial cleaning leaves the odor source - then treat the substrate with a commercial-grade sanitizer before reinstalling fresh material or switching to closed-cell in high-risk zones.
- Demilec Agribalance - degradation from cedar pollen + rodent oils combined. Agribalance’s bio-based polyol content makes it more susceptible to organic acid breakdown. In Cedar Park’s spring pollen season, the combination of rodent sebum and acidic pollen creates a tacky surface that attracts dust and further contamination. We see this most in attics near Cypress Creek and the 1431 corridor where pollen loads are highest. Our fix: full removal of affected areas, HEPA vacuuming of all adjacent surfaces, and reapplication with a non-bio-based alternative if the homeowner prefers.
- Lapolla FOAM-LOK FLX 500 - cracking at penetration seals after rodent disturbance. FLX 500’s flexibility is designed for thermal cycling, but rodent traffic at pipe and wire penetrations fatigues the material beyond its design range. The cracks are hairline and easy to miss without a smoke pencil or blower-door test. We remove the compromised seal, install stainless-steel mesh backing, and re-foam with a higher-density plug that resists gnawing.
- Demilec open-cell in vaulted ceilings - compression from stored items after rodent nesting. Homeowners in Cedar Park’s newer builds (2018-2023) often use vaulted attic spaces for storage. Rodents nesting in Demilec open-cell compress the foam to 30-40% of original thickness, and the R-value drops proportionally. We don’t just clean and leave it - we measure the compressed depth, calculate the thermal loss, and present options: spot replacement with original density foam, or upgrade to closed-cell if the roof deck allows.
Our Demilec Attic Cleaning & Rodent Proofing Process
- 1
Pre-work blower-door test and photo documentation. We pressurize the house and record the CFM50 reading - the number that tells us how leaky the envelope is before we disturb anything. Photos of all Demilec-labeled foam areas are time-stamped and saved to your job file.
- 2
Contamination mapping and material identification. We identify your specific Demilec product by density, color, and any visible labeling. Different lines demand different cleaning agents; using the wrong chemistry on Heatlok HFO Pro’s HFO-blown formulation can off-gas for weeks.
- 3
Removal of soiled material with HEPA containment. Negative air machines run continuously. We bag Demilec foam waste separately from organic debris - some batches qualify for specialized recycling through our disposal partner, and we document that for your records.
- 4
Substrate sanitization and rodent exclusion. Enzymatic treatment on wood, followed by mechanical proofing: 1/4-inch hardware cloth at all penetrations, copper mesh at weep holes, and galvanized flashing at foam-to-structure transitions. Seal the leaks first. Then insulate. The order matters more than the product.
- 5
Reinstallation with OEM or specified alternative, and post-work blower-door test. We match density and R-value to original spec, or upgrade if you choose. The after-test reading goes on the same report as the before number, so you see the air-sealing result in actual ACH50 - not a promise, a measurement.
- 6
Written scope closeout with 365-Day Done Right Promise. Your Documented Photo Record, blower-door report, and warranty terms are delivered before the crew leaves. Haven Standard: Have it in writing.
What Demilec Attic Cleaning & Rodent Proofing Costs in Cedar Park
| Scenario | Typical Range | What Moves the Price |
|---|---|---|
| Light contamination, spot Demilec removal (<50 sq ft) | $1,800 - $2,600 | Access difficulty, single vs. multiple rodent entry points |
| Moderate contamination, full open-cell removal in 1,200 sq ft attic | $2,800 - $3,800 | Vaulted ceiling complexity, HVAC duct relocation needs |
| Severe contamination, full closed-cell removal with reinstallation | $3,500 - $4,200 | Deck replacement, upgrade to higher-density foam, multiple sanitization passes |
| Rodent proofing only (no foam work, attics with intact Demilec) | $900 - $1,500 | Linear feet of exclusion, roof pitch, soffit accessibility |
These are real numbers for Cedar Park’s market - not teaser rates. Every estimate is flat-priced and written before work starts, with no change orders unless you add scope. We also provide free second opinions on any competitor’s written estimate; bring it in and we’ll read it with you line by line. Call (737) 245-6428 for your written price.
Why Cedar Park Homeowners Call Topside Attic Insulation Cedar Park for Demilec Work
We’ve sealed and insulated over 9,000 homes since 2016, and a growing share of our Cedar Park calls involve Demilec foam that was installed during the 2018-2021 building boom and is now showing its first rodent or moisture issues. Wes Okafor brought blower-door discipline from Chicago’s building science program at Olive-Harvey College, and that same pre-install infiltration test runs on every attic job - including cleanouts where the goal is restoring the air seal the rodents broke.
Our techs carry Demilec density references in their tablets, not just generic foam specs. When we say we’ll match your original R-value, we mean it numerically, not approximately. The 365-Day Done Right Promise applies to all completed work, and a live person answers (737) 245-6428 24/7 - no voicemail loops, no callback windows measured in business days. We also service Reflectix radiant barriers and other brands, so if your attic has mixed systems, one crew handles it without subcontracting gaps.
FAQs
Demilec’s material warranty covers original installation defects, not subsequent damage or service work by independent providers. Our practices are warranty-safe - we document original batch numbers where visible, use Demilec-compatible sealants for repairs, and do not alter approved application thicknesses. We cannot extend Demilec’s factory warranty, but our 365-Day Done Right Promise covers our workmanship directly. Call (737) 245-6428 if you have a specific warranty concern and we’ll review your documentation.
We source Demilec products through authorized distributors when the job spec calls for exact material matching - Heatlok HFO Pro, SEALECTION 500, and Agribalance are all available to us. For some repairs, we also use compatible third-party foams that meet the same density and fire-rating specs, and we’ll tell you which we’re proposing and why. No proprietary lock-in; the choice is yours and it’s in writing before we start.
Surface staining without odor or structural compromise usually cleans successfully. Saturation deeper than 1 inch into open-cell, or any rodent nesting in closed-cell gaps, typically requires removal - the contamination is inside the foam matrix, not on it. We make this call with a core sample and moisture meter reading, not a guess, and show you the photo before recommending either path. Estimates are free.
Most jobs are scheduled within 3-5 business days of estimate approval, with completion in one to two working days. Severe contamination requiring full removal and reinstallation may run to three days. We do not rush the sanitization phase - incomplete drying traps moisture against your deck and creates a mold risk that costs more later. Call (737) 245-6428 for current scheduling.
Spot repair is cheaper when contamination is limited to less than 15% of total foam area and the remaining material passes adhesion and density tests. Beyond that threshold, the labor of multiple small removals and the risk of missed contamination usually make full replacement the better value. We’ll show you both numbers in writing and explain where the crossover point sits for your specific attic. Call (737) 245-6428 for a free written estimate.
Written by Wes Okafor, Owner, Topside Attic Insulation Cedar Park at Topside Attic Insulation Cedar Park, serving Cedar Park and nearby areas.