What is mud jacking? Mud jacking is one of several techniques used to raise or lift a sinking concrete slab. It is commonly used to repair sunken patios, driveways, foundations, steps, garage floors, and other surfaces. First, small holes are drilled into the concrete slab. Then, a concrete mixture is pumped (or injected) under the surface. This new material helps to push the slab back into its original position. Get Free Price Quotes from Local Mudjacking Contractors By ProMatcher Staff Updated: 02/02/2016 Get Free Quotes Today! Get Free Quotes Today! Find Local Pros Free Concrete Slab Leveling or Mudjacking Cost Estimates Related Questions How Much Does Concrete Leveling Cost? How Much Does Mudjacking Cost? Can mudjacking be done during the winter? (when temperatures fall below 40 degrees Fahrenheit)Top answer: In some cases What is Concrete Leveling? What is slab jacking?