Soil erosion and settlement often cause concrete slabs to sink into the ground

Soil erosion and settlement repeatedly cause concrete slabs in patios, sidewalks and driveways to sink into the ground. This type of settlement isn't just unattractive; it can also cause added damage and can be a safety hazard. Water tends to pool on sunken surfaces and un-leveled  floors cause a trip hazard. 

Until now, the lone solution on hand to repair sinking slabs was mud-jacking, a procedure that involves drilling holes in the slab to inject a mixture of cement and mud underside, to raise it back to level.