Concrete injection, leveling, or mudjacking is a process which hydraulically lifts an existing damaged concrete walk, drive, steps, etc. to its original position. Since it typically costs about half as much as total replacement, it is often an alternative worth exploring.
An environmentally safe mixture is pumped under existing concrete and masonry to float hazardous, unsightly areas into place. Repairs are commonly made on driveways, porches, sidewalks, floors, steps, patios, pool decks, foundations, sunken footers, bowed basement walls, and leaning chimneys.
Several holes are drilled in the sunken concrete. Pumping compound is pumped from a truck into each hole. The compound works hydraulically underneath the concrete, raising it back to its original position.
Once the concrete reaches the desired level, the holes are sealed off using a durable cement mixture. The repaired area can usually be used the same day that repairs are made.