How to Clean Up Mold Steps: 1. When mold is present on drywall and other hard-to-clean surfaces, hire an environmental expert to replace the moldy areas. 2. If mold is found on house framing, use a vacuum fitted with a HEPA filter to remove the excessive gross mold. 3. Sand the wood smooth, then apply a biocide to kill mold spores. 4. Encapsulate the mold with mold inhibitor. 5. Contact industrial hygienist to evaluate the mold problem. 6. To prevent future mold growth, repair leaky pipes and roof, and other moisture-emitting trouble spots. 7. Increase home ventilation to exhaust moisture caused by cooking, washing and showering.