Demilec Attic Cleaning & Rodent Proofing in Mountain View: What to Know First
We provide independent Demilec attic cleaning and rodent proofing in Mountain View, with most jobs completed in a single day and a written price delivered before any work starts. As an independent Demilec service provider, we’re not affiliated with or authorized by Demilec, which means we source quality parts based on what the job actually needs, not what a factory program dictates. Most Mountain View homeowners with Demilec spray foam or hybrid systems call us after finding rodent damage, compressed insulation, or odor issues that the original installer won’t address. If you’re seeing droppings, smelling ammonia, or noticing your HVAC runs longer than it used to, the attic is the first place to look. Call (669) 259-0406 for a free estimate and a written scope.
How Demilec Products Fail - and How We Fix Them
- Demilec Heatlok HFO Pro and rodent tunneling: The semi-rigid closed-cell structure of Heatlok HFO Pro doesn’t compress like fiberglass, but rodents will burrow directly through it to nest against warm ductwork in Mountain View’s cooler winter months. We remove the contaminated foam sections, sanitize the substrate, and install rigid exclusion barriers before restoring the thermal boundary. The fix isn’t more foam over the holes - it’s mechanical blocking that rodents can’t chew.
- Demilec Sealection 500 and attic floor contamination: Sealection 500’s open-cell chemistry absorbs organic odors when rodents urinate on it, and standard cleaning won’t neutralize the smell. We’ve pulled out entire Sealection 500 applications in Old Mountain View where the odor had migrated into conditioned space through recessed can lights. Our process is full removal of affected areas, enzymatic decontamination of the framing, and replacement with a closed-cell or hybrid system that doesn’t act like a sponge.
- Demilec Heatlok XT and top-plate gap failures: Heatlok XT shrinks slightly during cure, and in Mountain View’s dry summer conditions that shrinkage can open hairline separations at top plates that rodents exploit as entry highways. We find these with blower-door-directed smoke testing - pressurizing the house to reveal exactly where the envelope is leaking - then seal with compatible two-part foam and install steel mesh at all penetration points.
- Demilec APX and degraded vapor barriers: APX’s hybrid formulation relies on a proper vapor barrier sequence, but rodent activity tears the poly layer and allows moisture into the assembly. In Rex Manor and Monta Loma, we’ve seen APX systems with hidden mold behind intact-looking foam where rodents compromised the barrier years earlier. We strip to dry framing, treat for mold if present, and rebuild with documented moisture readings at each stage.
- Demilec Eco-Pur and thermal drift from nesting disturbance: Eco-Pur’s lower-density open-cell structure is vulnerable to displacement when rodents nest and compress it, creating cold spots that show up clearly on infrared. We document these with thermal imaging before touching anything, remove the contaminated material, and replace with a density-matched product that maintains its R-value under load.
Our Demilec Attic Cleaning & Rodent Proofing Process
- 1
Call and scheduling: A live person answers, or you can text. We book a diagnostic visit with a named technician - you’ll get a text when they’re en route, under Haven Standard: Arrive on schedule.
- 2
Blower-door and thermal assessment: We pressurize the house and use smoke pencils and infrared to find every leak path, including the ones rodents are using. You get the CFM50 number before we touch anything.
- 3
Written scope and price: We specify Demilec-compatible materials or alternatives if the original product is discontinued or unsuitable. The price is flat. No work starts without your signature on the scope.
- 4
Exclusion and removal: Rodent-proofing comes first - steel mesh, concrete patch, hardware cloth at all penetrations. Then contaminated insulation and foam come out, with HEPA containment and negative air pressure if needed.
- 5
Restoration and verification: We rebuild the thermal and air barrier, run a post-job blower-door test, and hand you the documented photo record plus the before-and-after ACH50 figure. Seal the leaks first. The insulation has nowhere to go if the air does.
What Demilec Attic Cleaning & Rodent Proofing Costs in Mountain View
| Scenario | Typical Range |
|---|---|
| Attic cleanout with light rodent activity, no foam removal | $1,800 - $2,800 |
| Moderate contamination with Demilec open-cell removal and replacement | $3,500 - $5,200 |
| Full restoration with closed-cell foam replacement and complete exclusion | $5,800 - $8,500 |
| Additional blower-door verification and written report | Included |
What moves the price: square footage of affected foam, accessibility (cathedral ceilings in Mountain View’s Eichler-influenced homes add labor), whether the HVAC ducting is contaminated, and if mold remediation is required. We also service Reflectix radiant barrier systems when they’re part of the same assembly. Every estimate is free, every price is written, and every job gets the Documented Photo Record. Call (669) 259-0406 for your exact number.
Why Mountain View Homeowners Call Topside Attic Insulation Mountain View for Demilec Work
We’ve been in Mountain View attics since 2016, and we’ve learned that Demilec systems fail in predictable ways that generic insulation crews miss. Wes Okafor sequences every job the same way he learned on the Peninsula: air-seal first, insulate second, document everything. Our 365-Day Done Right Promise means if a rodent finds a gap we missed, we come back and close it. Materials come from Demilec, Icynene, Owens Corning, and other suppliers - no proprietary lock-in, so we specify what performs, not what we’re contracted to push. Calls are answered live, 24/7, by a person who can schedule you. Background-checked, uniformed technicians. Written price before any work starts. That’s Haven Standard.
FAQs
Demilec’s original installation warranty typically covers material defects and installer workmanship, not subsequent damage from rodents or environmental factors. As an independent service provider, our work doesn’t activate or void any existing manufacturer coverage - though we document our process photographically in case you need to file a claim. Call (669) 259-0406 and we’ll review your paperwork with you.
Most diagnostic visits are scheduled within 48 hours, and emergency situations - active rodent infestations, HVAC contamination, or safety hazards - get same-day response when possible. We don’t do callback windows measured in business days. Text or call (669) 259-0406 to check current availability.
Repair makes sense when contamination is localized and the original foam is performing thermally - typically under 20% of total attic area affected. Full replacement is the better value when open-cell products like Sealection 500 or Eco-Pur have absorbed odors system-wide, or when multiple shrinkage failures in Heatlok XT indicate a broader application issue. We give you both numbers in writing and let the math decide.
We source OEM Demilec when it’s the right product for the repair and available with reasonable lead time. When Demilec has discontinued a line - some Heatlok variants are now legacy products - we specify compatible alternatives from Icynene or other manufacturers with matched density and vapor permeance. You see the product data sheets before we order.
We guarantee our exclusion work for 365 days under the Done Right Promise. That covers every penetration we sealed, every mesh barrier we installed, and every gap we found during the blower-door test. If a rodent breaches our work, we return and fix it at no charge. The guarantee is in writing before we start, not a verbal promise after we’re done.
Written by Wes Okafor, Owner & Lead Insulation Technician, Topside Attic Insulation Mountain View at Topside Attic Insulation Mountain View, serving Mountain View and nearby areas.