Demilec Attic Cleaning & Rodent Proofing Nationwide

Demilec Attic Cleaning & Rodent Proofing in Los Angeles: What to Know First

We provide independent Demilec attic cleaning and rodent proofing in Los Angeles, typically completing most jobs within one to two days after our initial inspection. Most Demilec attic restoration projects in Los Angeles run between $2,800 and $6,400 depending on contamination level, attic square footage, and whether the Demilec open-cell foam requires partial removal to access rodent entry points. We publish a written price before any work starts and back it with a 365-Day Done Right Promise.

Call (628) 226-1097

This page is for Los Angeles homeowners who have Demilec spray foam insulation in their attic and are dealing with rodent activity, droppings, odors, or compromised insulation. If you’re seeing staining on your Demilec foam, hearing activity overhead, or smelling ammonia after recent rains, we can inspect and give you a flat written estimate. Call (628) 226-1097.

How Demilec Products Fail - and How We Fix Them

• Demilec Sealection 500 open-cell foam soaks up rodent urine and holds odor. Unlike closed-cell products, Sealection 500’s porous structure wicks biological contaminants deep into the matrix. We remove the affected foam in controlled sections, HEPA-vacuum the substrate, apply an enzymatic decontaminant, and reinstall with closed-cell Demilec Heatlok HFO or an appropriate replacement barrier. In Los Angeles, this is most common in Marina del Rey and Venice homes where roof rats access via palm frond bridges.
• Demilec Heatlok Soya HFO shrinks at top plates when rodents compress it. Rodents tunneling along the attic perimeter pack down the foam’s exposed edges, creating convection loops that the original blower-door test didn’t account for. We cut back the compressed sections, reseal with fresh Heatlok HFO, and rerun the blower-door test to verify the envelope is intact. We’ve tracked this on three homes in the Leimert Park corridor since 2022.
• Demilec APX 5000 in unvented attics traps moisture after rodent carcass decomposition. The high R-value per inch works against you when biological material decomposes underneath; vapor drives inward and the foam skin delaminates from the substrate. We remove the compromised APX 5000 in sheets, treat the deck with antimicrobial, and reinstall only after confirming the moisture content reads below 19% with a pinless meter.
• Demilec Sealection Agribalance degrades where rodents gnaw through to reach top plate gaps. The soy-based content attracts persistent chewing once rodents identify it as a pathway. We excise the gnawed sections, install galvanized steel mesh exclusion at the penetration points, and refoam with a non-organic-content alternative that removes the feeding cue. This is warranty-safe practice and doesn’t void your original Demilec installation warranty for the intact areas.
• Demilec open-cell foam conceals rodent runways until the odor announces them. Because Demilec open-cell products fill cavities completely, rodents travel between the foam surface and the drywall with no visible entry trail. We use a borescope inspection at soffit chases and party walls to map the actual routes, then cut selective access ports rather than stripping the entire attic. This preserves your insulation investment and targets only the compromised zones.

Our Demilec Attic Cleaning & Rodent Proofing Process

1. 1
   Inspection with written scope. We inspect your Demilec installation, identify the product line and thickness, and document rodent evidence with photos. You get a written price before any work starts.
2. 2
   Blower-door test if the envelope is involved. We run a pressurization diagnostic to establish your baseline CFM50. If rodents have compromised air sealing at top plates or penetrations, we measure the leakage so we can prove the fix afterward.
3. 3
   Controlled foam removal and HEPA extraction. We remove only the Demilec foam that is contaminated, compressed, or degraded. All debris is HEPA-vacuumed; no compressed air that would drive particulate through your HVAC.
4. 4
   Substrate treatment and exclusion install. The deck and framing receive enzymatic decontamination. We install galvanized steel mesh at all rodent entry points, including eave gaps, pipe penetrations, and chimney saddles common on Los Angeles ranch-style homes.
5. 5
   Reinstallation and performance verification. We reinstall appropriate insulation, whether Demilec-compatible foam, batt, or blown product. On applicable jobs, we rerun the blower-door test and publish your before-and-after numbers.
6. 6
   Documented Photo Record and warranty delivery. You receive photos, product data sheets, and the 365-Day Done Right Promise in writing before we leave.

Before

After

What Demilec Attic Cleaning & Rodent Proofing Costs in Los Angeles

What moves the price: attic accessibility (scuttle vs. pull-down stairs), whether the Demilec foam is open-cell requiring deeper contamination removal, and the extent of exclusion work needed at roofline gaps common in pre-1980 Los Angeles construction. We also service Reflectix radiant barrier systems when those are present in the same attic.

Every estimate is free and written. No work starts without your signed scope and flat price. Call (628) 226-1097 to schedule.

Why Los Angeles Homeowners Call Topside Attic Insulation Los Angeles for Demilec Work

We’ve restored Demilec-insulated attics in Los Angeles since 2016, and we’ve learned that foam brand matters for how you approach rodent damage. Wes Okafor and our technicians know the Demilec product line well enough to distinguish between foam that can be cleaned in place and foam that must come out. We don’t strip healthy insulation to pad an invoice.

Our 365-Day Done Right Promise applies to every job. You get a named technician, a text when they’re en route, and a Documented Photo Record when the crew leaves. Calls are answered by a live person 24/7. If you have a competing estimate, bring it in for a Free Second Opinion. We’ll read it with you and tell you what’s actually specified.

We also service Reflectix radiant barriers, so multi-system attics get coherent treatment rather than piecemeal subcontracting.

FAQs