What is Mudjacking?

If you’ve noticed your sidewalk looks like a mini mountain range or your driveway has developed a “step” that trips everyone who visits, you’re likely looking at concrete settlement. Mudjacking is the construction equivalent of a surgical lift for your concrete slabs.

Here is the breakdown of what it is and why it might be on your “to-do” list.

Mudjacking with Bedrock Foundation Repair

What is Mudjacking?

Mudjacking (also known as slab leveling or pressure grouting) is a process used to raise sunken concrete slabs by pumping a grout-like “slurry” underneath them.

How it works:

  1. Drilling: Small holes (usually about 1–2 inches in diameter) are drilled through the sunken concrete slab.
  2. Pumping: A mixture of water, soil, sand, and cement is pumped through these holes under high pressure.
  3. Lifting: As the mixture fills the void beneath the slab, it creates upward pressure, lifting the concrete back to its original position.
  4. Patching: The holes are filled with concrete, and the job is done.

Why Do You Need It?

Concrete doesn’t usually sink because the concrete itself is bad; it sinks because the ground beneath it has failed. You might need mudjacking if you are dealing with:

  • Soil Erosion: Water from leaky gutters or poor drainage has washed away the dirt under your patio or walkway.
  • Soil Compaction: If the ground wasn’t properly packed down before the concrete was poured, it will eventually settle under the weight.
  • Safety Hazards: Uneven concrete is a major tripping hazard. In many municipalities, a height difference of even $1/4$ inch can make you liable for injuries.
  • Preventing Further Damage: If a slab is tilted toward your house, it can direct water into your foundation or basement, leading to much more expensive repairs.

Mudjacking vs. Total Replacement

Feature Mudjacking Replacing Concrete
Cost Usually 50% cheaper Full price of labor + materials
Time Done in a few hours Takes days (demo, pour, cure)
Mess Minimal Significant (heavy machinery, dust)
Landscaping Your grass stays intact Expect ruts and torn-up turf