There are many types of cracks in foundation walls, but gravity is not always the same. These may include minor shrinkage cracks that do not affect the integrity of the building. However, we recommend having them repaired to avoid water infiltration problems.
Another type, structural cracks, requires more attention. These cracks are caused by a structural movement of the building that is the result of either soil subsidence, frost heave, lateral soil thrust, inoperative or absent French drain, poor design of the footing (or foundation walls), poor load distribution or poor concrete implementation.
Soil subsidence is the most important factor responsible for structural cracks in foundation walls. In this article, you will find the telltale signs of a movement of the building attributable to a subsidence of the ground.