Get a fucking gas powered pressure washer full of liquid culture of this shit ( https://www.ecurrent.com/food/meet-the-mushroom-stronger-than-sidewalks-banded-agaricus/ ) and spray the building from the back of a pick up truck while wearing a hazmat suit, cheaper than you’d think clean room suit with a skin tight Russian surplus gas mask retrofitted with a modern Honeywell filter using a gas mask adapter.