Mold Prevention and Cleanup After Water Damage

Calm preparedness scene illustrating mold cleanup after flooding

Reduce mold growth after leaks or floods by entering safely, drying promptly, discarding unsalvageable materials, and using appropriate protection.

Confirm the building is safe

Do not enter until authorities or qualified inspectors address structural, electrical, gas, and floodwater hazards. People with asthma, immune suppression, severe allergies, or other health concerns should ask a clinician whether they should participate.

Dry materials promptly

When safe, stop the water source, remove standing water, and increase ventilation if outdoor air is appropriate. Dehumidifiers may help. Do not use fans where they could spread sewage contamination or extensive mold.

Decide what can be cleaned

Hard, nonporous surfaces can often be cleaned with detergent and water and dried fully. Porous insulation, ceiling tile, carpet, or drywall may need removal when heavily contaminated or impossible to dry. Follow local disposal rules.

Protect the cleanup team

Wear suitable gloves, eye protection, clothing, and respiratory protection for the job. Never mix bleach with ammonia or other cleaners. Large areas, sewage contamination, HVAC involvement, or hidden growth may require trained remediation professionals.

Prevent recurrence

Repair leaks, control indoor humidity, maintain drainage, and inspect repaired areas. Do not paint or seal over wet or moldy material. Seek medical advice for breathing problems or other significant symptoms.