Attic cleanup follows a CDC-aligned protocol. The reasons are direct. Hantavirus exposure from dried droppings. Leptospirosis from urine staining. Bacterial contamination across every contacted surface. These need pro methods, not household cleaning. Six steps make up the standard scope.
Step 1, Pre-cleanup review
The inspector records how heavy the contamination is (light, modest, or heavy). We note where it's located, what the insulation condition is, what structural surfaces are affected (joists, decking, framing), and whether any HVAC parts are exposed. You get a written review with photos. The review decides whether cleanup in place is enough (light to modest) or whether removal and replacement of the insulation is needed (heavy).
Step 2, Containment setup
Plastic sheeting at attic access point to prevent dust migration into living space. HEPA-filter air scrubber positioned in attic to capture aerosolized particles during the work. Negative-pressure setup where structural conditions allow. Technicians use N95+ respirators, disposable coveralls with hood and booties, and chemical-resistant gloves across the work.
Step 3, Droppings and nest material removal
HEPA-filter vacuum collection of loose droppings, nest material, and accessible contamination. Vacuum bags sealed and disposed of in biohazard-rated containers. Hand-removal of larger nest concentrations using disposable scoops and sealed bags. The removal work runs 2-6 hours based on contamination scope.
Step 4, Insulation review and selective removal
Light contamination on fiberglass batts: we vacuum and disinfect in place. Modest contamination: we remove the affected sections, leaving the rest intact. Heavy contamination — saturation, tunneling across, multiple nest sites — means complete attic insulation removal in bagged sections. Replacement is arranged as a separate phase.
Step 5, EPA-registered disinfection
We spray every contacted surface with EPA-registered disinfectant. It's rated for hantavirus and bacterial pathogens. We give it a 10-minute dwell time before any wipe-down. The spray reaches surfaces the vacuum can't. Wood structural surfaces, like joists and decking, get sprayed where there's visible staining. Non-staining contamination is wiped-and-disinfected.
Step 6, Air quality check and records
The HEPA filter runs another 30 to 60 minutes after cleanup work is done. We do a final walkthrough with you when we can, showing the done work. The written report covers the contamination review, what we did, what we used, and any structural follow-up or insulation replacement we'd suggest arranging next.
Typical cleanup pricing
Light contamination in an accessible attic runs $580 to $1,200. Modest, with some insulation removal, runs $1,200 to $2,400. Heavy contamination needing complete insulation removal runs $2,400 to $5,200. Insulation replacement is a separate $1,800 to $4,500, billed by the replacement contractor.
