Concrete Jack's skilled technicians are experts at slabjacking, a process that has been around since the 1930's, and which works by injecting grout material under sunken or unsupported concrete to raise it back to its original levels. After being injected, the grout dries out and hardens to permanently support the affected areas. Slabjacking works on almost any type of flat concrete, whether it be inside of a house, around a pool, on the top of your front porch or slabs of your sidewalk or driveway. Concrete Jack also raises and supports concrete using expanding polyurethane foam, which works to push up settled and uneven concrete by expanding below the concrete after being injected through dime-size holes drilled through the surface.
It doesn't take much pressure to raise concrete, our employees are careful and our slabjacking equipment is compact, so we can work in almost any environment, safely and effectively.
The diagrams below illustrate the slabjacking process.
| Drill | Pump | Patch |
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Concrete Jack's slabjacking technicians drill strategically-placed holes through the settled concrete. |
Concrete Jack's custom grout mix is pumped through the holes to fill any voids under the concrete and raise it back up. Grout is mixed onsite, which allows crews to customize each batch for the application. | Concrete Jack's slabjacking technicians patch the injection holes with concrete. Each of our crew trucks has a wide selection of colored cements, sands and organic materials to match patches to the existing concrete as closely as possible. |
The foam jacking process works in a very similar way. First, 5/8" (dime-size) holes are drilled through the surface of the concrete. After screwing ports into the holes, heated, pressurized foam is injected into the space under the concrete. The two foam components are mixed as they pass into the space under the concrete, and then react with each other to expand. Different types of foam mixes react at different speeds; quicker foams are best for small slabs, while longer reacting foams are best for large or exceptionally thick slabs. The foam cures within a few minutes of injection, the ports are removed and the holes are patched with concrete. In general, concrete lifts a little slower using foam than sand-based grout, however fewer, smaller holes and minimal set up time mean that polyurethane foam is often the quicker option.
