1. Water pressure from the outer walls. This is the most common cause of cracks or slope of the basement wall. This circumstance arises when the soil of the surrounding your basement is too saturated with water. The soil begins to become harder and begins to increase pressure on the lower columns of the basement walls. Excessive moisture can occur due to rains, melting snow or other problems that exert pressure on the walls. As a rule, the first signs that this problem has a place to be, the appearance of large cracks in concrete walls. If you are not able to act to solve the problem, cracks will grow more and more, and the walls will begin to bend and break.