One section in my basement wall is... I'm not sure what to call it, but eroding fits, and will crumble when you touch it. The effected area is roughly 20" wide by 30" high, starting at the basement floor. I assume that water is the cause, but my Driveway is on the other side of this wall, right up against the exterior basement wall, approximately 4' above the basement floor. I do not know what a "proper" fix for this wall would be. Can you please help?