Rodents, smoke, water and decades-old fiberglass turn an attic into a health hazard. We safely remove contaminated material, HEPA-vacuum and sanitize the deck, then seal every entry point so the space stays clean.
We photograph the contamination, identify entry points, and scope the removal so you know exactly what's being hauled out and why.
02
Containment setup
Drop cloths from the door to the attic, HEPA negative-air machine, masked vents and a sealed attic hatch keep dust out of your living space.
03
HEPA removal & sanitization
All contaminated insulation is vacuumed out and bagged in the attic. We sanitize the deck and framing with an EPA-approved disinfectant.
04
Rodent exclusion & sign-off
Every penetration is sealed with hardware cloth, copper mesh and rodent-grade foam. You get before/after photos and a written warranty.
Day-of checklist
Exactly what happens at your appointment.
Every visit follows the same checklist so nothing is skipped — and so you know exactly what your crew is doing, when.
01
Arrival & containment
30–45 min
Walk the scope and confirm access with you
Lay drop cloths from the front door to the attic hatch
Set up HEPA-filtered negative-air machine inside the attic
Mask vents, registers and the attic opening
02
Inspection & documentation
20–30 min
Photograph contamination, entry points and damaged areas
Identify knob-and-tube, junction boxes and bath-fan ducting
Map rodent runs and nesting sites for targeted removal
Confirm the day's plan and any change orders with you
03
HEPA removal
2–4 hrs
Vacuum out all contaminated insulation into sealed bags
Remove damaged vapor barriers and nesting material
Carry bagged debris directly out to the truck
Continuous HEPA filtration throughout the removal
04
Sanitization & rodent-proofing
1–2 hrs
Spray attic deck and framing with EPA-approved disinfectant
Seal eave, soffit and gable vents with hardware cloth
Stuff penetrations with copper mesh and rodent-grade foam
Treat exterior entry points and trim back overhanging branches
05
Cleanup & sign-off
20–30 min
Roll up drop cloths and HEPA-vacuum the work path
Walk you through before/after photos on the tablet
Provide written scope, exclusion warranty and care tips
Schedule the re-insulation visit if it's not already booked
Materials
The right material for your home.
HEPA negative-air machine
Industrial filtration unit creates negative pressure in the attic so airborne particles are captured at the source, not blown into the home.
EPA-approved sanitizer
Hospital-grade disinfectant safe for residential use — neutralizes bacteria, viruses and odors left by rodents or water damage.
Hardware cloth & copper mesh
Galvanized 1/4" hardware cloth and copper wool seal vents, soffits and penetrations against rats, mice and squirrels.
Before & after
Real Bay Area projects, side by side.
Every install is documented with photos so you can see exactly what we did — and so can your inspector.
BeforeAfter
01
Decades of rodent-damaged fiberglass removed and attic deck sanitized
Oakland · Rockridge
BeforeAfter
02
Full decontamination + exclusion before new R-60 install
Berkeley · Elmwood
Homeowner stories
Words from the people who hired us.
★★★★★
"We could smell something off in the upstairs bedroom for months. Turned out to be rats nesting in the attic. Johnson's crew was in and out in a day, and the smell was gone immediately."
Mei Tanaka
Oakland · Rodent decontamination
★★★★★
"After the 2024 fires our attic insulation was full of ash. They removed everything, sanitized it, and sealed the soffit vents. House finally feels clean again."
Carlos Mendoza
Berkeley · Smoke-damaged attic cleanup
★★★★★
"We needed the attic cleaned before adding a new HVAC system. The crew documented every step with photos and the rodent-proofing has held up perfectly."
Aaliyah Brooks
El Cerrito · Pre-remodel decontamination
Savings calculator
Estimate what you'll save each year.
Three quick questions. Numbers use 2024–25 PG&E rates, CEC climate-zone data, and DOE / ENERGY STAR savings ranges for upgrading to Title 24 (2022) code.
Home size
Current insulation
Climate zone
Your estimate
Estimated annual savings
$291
≈ $24 / month off heating & cooling
10-year savings
$2,910
CO₂ avoided / yr
930 lbs
Comfort boost
Even temps, fewer drafts
Estimates only. Actual savings vary by home condition, HVAC equipment, utility rates and usage. We'll confirm exact numbers during your free on-site assessment.
View assumptions for your selections
Your home
Home size
1,200 – 2,200 sq ft → 1,700 sq ft modeled
Current insulation
Attic ≈ R-19, walls ≈ R-11
Title 24 (2022) target
Attic R-38, walls R-13 + R-5 c.i. (or R-20)
Estimated HVAC reduction
18% of heating + cooling load
Climate & rates
Climate zone
Inland Bay (Walnut Creek, Napa) — multiplier ×1
Baseline HVAC cost
$0.95 / sq ft / yr (CZ12 reference)
PG&E electric rate
≈ $0.45 / kWh (2024–25 avg)
PG&E gas rate
≈ $2.52 / therm (2024–25 avg)
CO₂ factor
3.2 lbs CO₂ / $ saved (≈65% gas, 35% electric)
Calculation
1,700 sq ft × $0.95 × 1 (climate) × 0.18 (savings) = $291 / yr
Sources: DOE Guide to Home Insulation, ENERGY STAR Seal & Insulate methodology, CEC 2022 Title 24 envelope requirements, PG&E 2024–25 rate advisories, and the 2024 CEC Power Content Label for PG&E.
FAQ
Questions, answered.
Don't see your question? Call us at (510) 660-0455 or request a free estimate.
Book an appointment
Pick a time — we'll be there.
On-site visits are free and take about an hour. Choose any open Monday–Friday slot in the next two weeks; booked times disappear from the picker in real time so you never double up.
