What is a vertical crack?
Vertical cracks run up and down and can sometimes be tricky to repair. Expansion and shrinkage of the blocks or concrete, wall movement, or tipping walls can cause vertical cracks. They become a problem when horizontal or shearing movement occurs.
What causes vertical cracks?
Vertical cracks are usually the result of the foundation settling. If a vertical crack widens at the top or bottom, the wall is could be either settling or gradually heaving, which may present more serious issues.