Uneven sidewalks, sunken driveways, tilting garage floors. These are tripping hazards, safety concerns, and often early signs of deeper issues like soil erosion or settling foundations. But tearing out and replacing concrete isn’t the only (or best) solution.
Enter slabjacking—a time-tested, cost-effective process that lifts and levels concrete surfaces without the mess, cost, or downtime of full replacement.
So… What Is Slabjacking?
Slabjacking (also known as mudjacking, pressure grouting, or simply slab lifting) is the process of raising sunken or uneven concrete by pumping a specially formulated grout mixture beneath it.
The idea is simple: fill the voids, stabilize the subsoil, and lift the slab back into place—safely and precisely.
Using specialized equipment, like our industry-leading Black-Jack Grout Pumps, technicians drill small holes (typically 1.5 inches in diameter) into the affected slab. Then, under carefully controlled pressure, a non-shrink cement grout is pumped beneath the concrete at a steady rate of 1 cubic foot per minute. As the grout flows into the empty spaces, it gradually lifts the slab to its original position.
Once the concrete is properly leveled, the surface is cleaned, and the holes are sealed using a custom color-matching system, leaving behind a professional, almost invisible finish.
Most slabjacking projects are completed in under four hours, making it one of the most efficient ways to restore concrete without interrupting daily life or business operations.
Why Choose Slabjacking Over Replacement?
Whether you’re a homeowner with a sinking patio or a commercial property manager trying to maintain safe walkways, slabjacking offers a number of compelling benefits:
1. It Saves Money
Slabjacking can cost as little as one-quarter the price of ripping out and replacing concrete. That’s thousands of dollars saved, without compromising quality or safety.
2. It’s Faster and Cleaner
No jackhammers, dump trucks, or weeks of waiting for new concrete to cure. Slabjacking gets you back on solid ground, often in just a few hours.
3. It’s Stronger and More Durable
Unlike older methods that use unstable mixes of topsoil, mud, or sand, Black-Jack’s exclusive non-shrink cement grout forms a stable foundation that resists erosion and lasts for years.
4. It Prevents Future Damage
By filling empty pockets in the soil and sealing the subgrade, slabjacking helps prevent the kind of erosion and settlement that causes concrete to sink in the first place.
What Sets Black-Jack Grout Pumps Apart?
While the concept of slabjacking is widely used across the industry, not all methods or equipment are created equal. The quality of the lift depends heavily on the grout formula and the pumping equipment used.
Here’s how Black-Jack Grout Pumps outshine the competition:
Non-Shrink Grout Formula: Our proprietary grout doesn’t break down over time like traditional mud mixes. That means no resettling and longer-lasting results.
Precision Injection: Black-Jack pumps deliver grout at a controlled, steady flow rate, ensuring a gentle, even lift that won’t crack or stress the slab.
Reliable Equipment: Designed for both small contractors and large infrastructure jobs, our pumps are durable, efficient, and easy to operate and maintain.
Common Applications of Slabjacking
Slabjacking isn’t just for cracked sidewalks. It’s used in residential, commercial, and municipal settings to lift and level:
- Driveways and garage floors
- Sidewalks and walkways
- Warehouse and factory slabs
- Pool decks and patios
- Basement and interior concrete
- Roads and highways
- Airport runways and tarmacs
If it’s concrete and it’s sinking, there’s a good chance slabjacking can fix it.
Watch a video of a team leveling a driveway using slabjacking.
Don’t Settle for Sinking Concrete
Sinking concrete doesn’t mean you have to start from scratch. Slabjacking with Black-Jack Grout Pumps offers a proven, long-lasting solution that saves time, money, and stress.
If you’re a contractor looking for professional-grade grout pumping equipment in need of a fast, permanent fix, we’re here to help you lift your standards.
Ready to Learn More?
Visit our equipment page to explore our lineup of grout pumps, or contact us to find a local contractor who uses Black-Jack equipment.
Reclaim your concrete—the smarter way.
