MUD JACKING is a procedure which involves drilling two-inch diameter holes through the concrete in the affected area. Bringing in a hose, about the size of a firehose, with a nozzle that fits in the hose and pumping in a thick mud grout under the floor. The grout is typically comprised of a sandy loam soil, water and cement.
The grout is pumped under the affected area with several hundred pounds of pressure until all voids are filled and backpressure lifts the concrete where it needs to be. Mud jacking has been successfuly used to lift streets, porches, garage floors, slab homes and driveways at a cost much lower than replacement.