Stone foundations are not much used nowadays, but in certain old-style houses, they are still existent. Stone foundations are usually difficult to repair and require professionals to handle it.

Stone cracks in foundation could be due to a number of reasons. As in most cracks, the prime cause is of leakage of water. If it is a mortared stone wall, then a leakage crack can be identified as a single thin crack localized around a particular region of the wall, especially where the stones join together. Trees that spring their heavy underground roots through the soil may also cause mechanical weathering of stone foundations. Stone also crumbles under vibrations which may be caused due to vehicles running aboveground.

To repair minor cracks in mortared stone walls, first a little of the mortar is chiseled out (about