What are the signs of a crumbling basement wall and how can it be repaired?

Signs of a crumbling basement wall include cracks, bowing or leaning, water damage, and crumbling or deteriorating concrete. To repair a crumbling basement wall, you may need to reinforce it with steel beams, install carbon fiber strips, or use epoxy injections to fill in cracks. It's important to consult with a professional to determine the best course of action for your specific situation.