Little bit of gutter damage can lead to foundation settlement

Step cracks can occur in concrete masonry unit (CMU) walls when there is excessive settling or shifting of the foundation. When a gutter downspout discharges water right at the foundation of the house, it can cause the soil to become saturated and expand, which can create pressure against the foundation walls. Over time, this can cause the foundation to settle or shift, leading to step cracks in the CMU wall.

Step cracks are characterized by diagonal cracks that step down along the mortar joints between the CMU blocks. They typically indicate that the foundation has settled or shifted vertically, causing the CMU wall to break along its weakest point, which is typically the mortar joints.

To prevent step cracks in a CMU wall, it is important to ensure that the gutters and downspouts are properly installed and directed away from the foundation. The downspouts should discharge water at least 5 feet away from the foundation to prevent saturation of the soil. Additionally, it is important to monitor the soil around the foundation for signs of settlement or shifting and to address any issues promptly to prevent further damage.