What is slab jacking?

Are you tired of walking on uneven concrete surfaces? Do you cringe every time you see cracks and sunken areas in your patio or driveway? Well, it’s time to uncover the secrets of slab jacking – the ultimate solution for all your concrete leveling woes.Whether it’s due to soil erosion, settlement, or poor construction, uneven concrete can be not only an eyesore but also a safety hazard. But fear not, because slab jacking is here to save the day. This innovative technique involves injecting a special blend of materials beneath sunken concrete slabs to lift them back into position.

What is slab jacking?

Slab jacking, also known as mud jacking or concrete leveling, is a process used to raise sunken concrete slabs and restore them to their original level. It is a cost-effective and efficient alternative to replacing the entire concrete surface. The process involves drilling small holes into the damaged concrete and then pumping a mixture of cement, sand, and other additives through these holes. This mixture fills the voids beneath the slab, providing a sturdy base that lifts the concrete back into place.

Signs of uneven concrete surfaces

Uneven concrete surfaces can be easily identified by various signs. If you notice cracks, sinking or settling areas, or even tripping hazards on your concrete patio, driveway, or walkway, chances are you have an uneven concrete problem. Other signs may include water pooling in certain areas, doors and windows that don’t close properly, or gaps between the walls and the floor.

These signs should not be ignored, as they can lead to further damage and safety risks. It’s important to address uneven concrete surfaces promptly to prevent accidents and costly repairs in the future.

The causes of uneven concrete surfaces

There are several factors that can contribute to the development of uneven concrete surfaces. One common cause is soil erosion, which can occur due to poor drainage or excessive moisture. When the soil beneath the concrete slab erodes, it creates empty spaces or voids, causing the slab to sink or settle.

Another cause of uneven concrete surfaces is settlement. Over time, the ground beneath the concrete may shift or compact, leading to unevenness. Poor construction techniques or inadequate preparation of the subbase can also contribute to this problem.

The benefits of slab jacking

Slab jacking offers numerous benefits over traditional methods of concrete repair. Firstly, it is a cost-effective solution. Instead of tearing out and replacing the entire concrete surface, slab jacking targets the specific areas that need repair. This not only saves you money but also minimizes the disruption caused by construction.

Additionally, slab jacking is a time-efficient process. Most slab jacking projects can be completed within a day, allowing you to resume normal activities quickly. It also eliminates the need for curing time, which is required for newly poured concrete.

Furthermore, slab jacking is an environmentally friendly option. By reusing existing concrete slabs, it reduces the amount of waste generated during the repair process. It also minimizes the use of new materials, making it a sustainable choice.

The slab jacking process

The slab jacking process typically involves the following steps:

  1. Assessment: A professional technician will inspect the damaged concrete surface to determine the extent of the problem and identify any underlying issues.
  2. Preparation: The technician will mark the areas that require slab jacking and carefully plan the drilling locations. Protective measures, such as covering nearby structures or plants, may be taken to prevent any damage during the process.
  3. Drilling: Small holes are drilled into the damaged concrete at strategic locations. These holes serve as access points for injecting the slab jacking mixture.
  4. Injection: A specialized pump is used to inject the mixture of cement, sand, and additives through the drilled holes. The technician carefully monitors the injection process to ensure an even and controlled lift of the concrete.
  5. Leveling: As the mixture is injected, it fills the voids beneath the concrete slab, raising it back to its original level. The technician continuously checks the level and adjusts the injection as needed to achieve an even result.
  6. Finishing: Once the slab has been raised to the desired level, the drilled holes are patched with a matching material to blend with the surrounding surface.

Factors to consider before choosing slab jacking

Before opting for slab jacking, there are a few factors you should consider:

  1. Structural integrity: Slab jacking is suitable for sunken or settled concrete slabs that are structurally sound. If the concrete has extensive damage or is crumbling, replacement may be a better option.
  2. Underlying issues: Slab jacking addresses the symptoms of uneven concrete surfaces but does not fix underlying issues such as poor drainage or soil erosion. It’s important to identify and address these issues to prevent future problems.
  3. Accessibility: Slab jacking requires access to the damaged concrete surface. If the area is obstructed or difficult to reach, it may affect the feasibility of the process.
  4. Cost and time: While slab jacking is generally more cost-effective and time-efficient than replacement, it’s important to consider the specific requirements of your project. Factors such as the size of the area, the extent of the damage, and the accessibility can impact the overall cost and duration of the repair.

DIY slab jacking vs. hiring professionals

While there are DIY slab jacking kits available, it is generally recommended to hire professionals for this task. Slab jacking requires specialized equipment and expertise to ensure proper execution and long-lasting results. Professionals have the knowledge and experience to assess the damage accurately, select the appropriate materials, and perform the necessary injections with precision.

Attempting to perform slab jacking without the necessary skills and equipment can lead to subpar results and even further damage to the concrete. It’s best to leave this job to the experts who can guarantee a safe and effective repair.

Common misconceptions about slab jacking

There are several misconceptions about slab jacking that need to be addressed. One common misconception is that slab jacking is only a temporary fix. While it’s true that concrete may settle over time due to natural factors, properly executed slab jacking can provide a long-lasting solution. The injected mixture creates a solid base that stabilizes the slab and helps prevent future settling.

Another misconception is that slab jacking will result in a noticeable patch on the concrete surface. However, with the use of matching materials and careful finishing techniques, the patched areas can be seamlessly integrated with the surrounding concrete, making them virtually indistinguishable.

Slab jacking cost and time considerations

The cost of slab jacking can vary depending on various factors, such as the size of the area, the extent of the damage, and the accessibility. On average, slab jacking costs range from $3 to $8 per square foot. This makes it a more affordable option compared to the cost of replacing the entire concrete surface.

In terms of time, most slab jacking projects can be completed within a day. This minimizes the disruption to your daily routine and allows you to enjoy your leveled concrete surface sooner.


Uneven concrete surfaces can be a source of frustration and potential safety hazards. Fortunately, slab jacking offers a cost-effective and efficient solution to these problems. By injecting a specially formulated mixture beneath sunken concrete slabs, slab jacking lifts them back into position and restores their original level.

Before choosing slab jacking, it’s important to assess the structural integrity of the concrete, address any underlying issues, and consider factors such as accessibility, cost, and time. While DIY slab jacking kits are available, it’s generally recommended to hire professionals for optimal results.

With the secrets of slab jacking unveiled, you can now bid farewell to those unsightly cracks and uneven surfaces. Embrace the wonders of slab jacking and step onto a perfectly level concrete surface with confidence. Say goodbye to tripping hazards and hello to a safer, more aesthetically pleasing environment.

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