Vertical cracks
Vertical cracks in poured concrete can be associated with shrinkage or localized movement. Stable hairline cracks may be less concerning than widening or displaced cracks, especially when water is entering.
Horizontal cracks
Horizontal cracking in basement walls can be associated with inward wall movement or lateral pressure and is generally a reason to look closely at the wall’s alignment and stability.
Stair-step cracks
Stair-step cracks follow mortar joints in brick or concrete block. They can appear with masonry movement or settlement and should be evaluated in the context of nearby doors, floors, corners, and other cracks.
Related foundation guides
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