To get rid of mold in basement walls, first address the source of moisture. Clean the affected area with a mold-killing solution, then apply a mold-resistant primer and paint. Ensure proper ventilation and consider using a dehumidifier to prevent future mold growth.

Address the moisture source, clean with a mold-killing solution, and apply a mold-resistant primer and paint. Proper ventilation and a dehumidifier help prevent future mold growth. Effective treatment ensures mold in walls is managed and controlled.