black mold and mildew spots on the ceiling or wall due to poor air ventilation and high humidity. harm to health

background bacteria black building ceiling cleaning damp damped dirt dirty fungus grunge health home house hygiene infestation interior messy microorganisms mildew mildewed moisture mold moldy mould mouldy neglected old pattern problem removal renovation room rooms rot rotten sanitation severe shabby spores surface texture toxic ventilation wall water weathered wet white