If any mold is found, determine the cause of moisture or mold and see if you can fix the moisture source. You might need to provide additional dehumidification or ventilation along with cleaning the contaminated area. For mold where the cause cannot be determined or is persistent, retain an industrial hygienist, toxicologist or a building science expert to identify the risks and perform any necessary remediation. Remediation efforts can be as extreme as removing walls, ceiling, and floors. It is best to address mold before it gets to such an extreme level of contamination. After fixing the source of the problem and cleaning or remediating the mold, perform periodic inspections to verify no reoccurrence of mold.