1. VERY IMPORTANT: Control the moisture problem. The source of the water should be identified and corrected. Wet materials should be either be thoroughly dried or discarded. Mold growth is impossible with the absence of moisture.

2. Discard all porous materials with extensive mold growth (e.g., drywall, ceiling tiles, woods, carpeting, and papers,).

3. Clean hard surfaces like woods, with mold growth already. Scrubbed molded areas with cleaning rag wetted with dilute detergent. It is recommended to use rubber gloves and a dust mask during cleaning.

4. Use 10% bleach solution to keep mold growth under control in areas where moisture cannot be eliminated. Make sure that there is enough air because bleach may cause nose, eyes, and throat irritation.

5. Constantly monitor the area for new mold growth and signs of moisture. This may indicate the need for further repairs or material removal. For a large mold problem or if you are highly sensitive to mold, an experienced professional should do the work.

And Of course you can hire an expert ...