Understanding Slab Jacking: A Comprehensive Guide


Have you noticed uneven or sunken concrete surfaces around your property? Slab jacking, also known as mud jacking or concrete lifting, is a proven technique to restore and level these surfaces. Let’s delve into the details to demystify the process.

The History of Slab Jacking

Slab jacking has a rich history dating back to the early 20th century. The method was developed as a solution to address sunken or uneven concrete surfaces caused by settling, shifting soil, or other factors. Here’s a brief historical overview:

  1. 1920s: The earliest forms of slab jacking emerged in the 1920s. Contractors and engineers began experimenting with techniques to lift and level concrete slabs, primarily for repairing sidewalks and driveways.

  2. 1930s: As the method gained popularity, the process became more standardized. The use of mud as a lifting agent became prevalent during this period. Commonly referred to as mud jacking, the technique involved pumping a mixture of mud, water, and sometimes additives beneath a sunken concrete slab to raise it.

  3. 1940s-1950s: Advancements in materials and equipment improved the effectiveness of slab jacking. The use of more stable materials like crushed limestone or sand started replacing simple mud mixtures, enhancing the durability and long-term results of the process.

  4. 1960s-1980s: Slab jacking continued to evolve, with the development of specialized equipment and hydraulic systems. The method became more widely used in various construction and infrastructure projects, including repairing industrial floors, highways, and airport runways.

  5. 1990s-Present: Modern slab jacking involves injecting a slurry mixture—often made of crushed limestone and other additives—beneath a concrete slab. This slurry fills voids, stabilizes the soil, and lifts the slab to its desired level. The process has become highly refined, offering precise control and minimizing disruption to the surrounding area.

Today, slab jacking is a trusted and cost-effective method for restoring sunken or uneven concrete surfaces in residential, commercial, and industrial settings. Advanced technologies and materials ensure that it continues to be a reliable solution for concrete repair and levelling.

Mud Jacking vs. Poly Jacking: The Essentials

Mud Jacking (Mud-Jacking): Mud jacking, the traditional approach, involves injecting a slurry mix (typically crushed limestone and water) beneath a sunken concrete slab. This mixture fills voids, elevates the slab, and establishes a stable base. An economical choice, mud jacking suits various applications, from driveways to industrial installations. The lifespan of mud jacking material is commendable, with results lasting for decades.

Poly Jacking (Poly Lifting): Poly jacking, a more recent counterpart, deploys expanding polyurethane foam through small holes.  This a blend of polymers, additives, and a foaming agent. This foam expands upon injection, lifting the concrete and stabilizing the soil. Quick curing times and lightweight materials make poly jacking appealing, with the choice dependent on factors such as project scope, soil conditions, and budget. Polyurethane boasts a lifespan exceeding 10 years.

Concrete Lifting Process: Step by Step
  1. Assessment: Our seasoned team evaluates the project, identifying sunken areas and determining the optimal technique—mud jacking or poly jacking.

  2. Drilling Holes: Small holes are strategically drilled into the affected concrete slab.

  3. Slurry or Foam Injection: In mud jacking, the slurry mix is pumped into drilled holes, raising the slab. Poly jacking involves injecting expanding polyurethane foam, achieving a similar lift.

  4. Lift and Level: The injected material fills voids or expands, gradually raising and leveling the concrete slab to the desired position.

  5. Patch and Finish: Upon completing the lift, the drilled holes are patched with new concrete, leaving a seamless, restored surface.

Why Choose Slab Jacking?
  • Budget-Friendly: More economical than full concrete replacement.
  • Time-Efficient: Most projects are completed within a day, minimizing disruptions.
  • Environmentally Sound: The use of natural materials or polyurethane foam aligns with eco-conscious choices.

Get a Quote Today! Say goodbye to uneven concrete surfaces. Contact MuddRuckers for a customized quote and embrace the benefits of slab jacking. Choose the concrete lifting experts—your satisfaction is our commitment!