Attic cleaning is infrequent but important — mostly removing pest evidence, dust accumulation, and the conditions that allow moisture problems to go unnoticed.
01Pest debris removal
Mouse droppings, nesting material, and deceased insects are the primary debris in most attics. Before handling, wear an N95 respirator — hantavirus and other pathogens are transmitted through dried rodent waste. Spray the area lightly with a disinfectant solution, wait 5 minutes, then wipe or vacuum with a HEPA-filter shop vac. Bag the debris and dispose of it. After cleaning, identify and seal entry points with metal mesh or foam before the next season.
02Dust and insulation debris
Disturbed insulation creates fine particulate that settles on all attic surfaces. Wear an N95 or P100 respirator and safety glasses for any attic work. Vacuum exposed surfaces — decking, joists, any storage items — with a shop vac before handling.
03Moisture and mold assessment
The purpose of an annual attic inspection is as much about looking as cleaning. Look at the underside of the roof sheathing and the top surface of the insulation for any signs of moisture — dark staining, actual wet areas, or mold growth. Mold on attic sheathing is usually a ventilation problem. Small areas of surface mold can be treated with a borax solution; significant coverage requires a remediation professional.
04Vent and access clearing
Soffit vent screens accumulate debris from outside — leaves, birds' nest material — that restricts the airflow the ventilation system depends on. Clear the screens from inside the attic with a stiff brush and vacuum. Clear the interior side of the ridge vent as well if accessible.
Marcus Webb is a general contractor and home maintenance writer based in Columbus, Ohio. He writes about the repairs and installs that come up every year in every house — the practical, repeating work that keeps a home livable.