Repairing basement walls that are crumbling requires a thorough inspection into the causes of the crumbling before the wall can be repaired, starting with a thorough inspection of moisture and its impact on the soil surrounding the area of the basement wall that is crumbling. After a thorough inspection, there are several methods to repair a basement wall, such as wall anchors, braces, carbon fiber straps, etc., to name some of the most common repairs.