6” Driveway Slab Lift at Carport Entrance

---

A recently purchased home came with an issue: the slab at the driveway entry into the carport had settled dramatically. Over time, water runoff had eroded the soil beneath the concrete, leading to a large void and causing the slab to drop nearly six inches. The drop created an area that was not used for quite some time. An entire section of the carport was unusable not to mention a serious trip hazard for foot traffic.

The new homeowner began researching for a concrete lifting and repair contractor. After coming across Wisco Concrete Solutions online, they reached out and were met with our prompt response, positive reviews, friendly staff, and confident, professional evaluation. From the first contact, they felt assured that this problem would be taken care of correctly — and permanently.

This project required a careful, controlled lift to correct a significant six-inch settlement without damaging the slab. By lifting the slab from above with manual jacks while simultaneously raising and stabilizing it from below with polyurethane foam, we were able to minimize stress and achieve a perfectly aligned, even lift.

The foam rebuilt the eroded base and locked the slab into position, while the jacks ensured all sections came up uniformly. The homeowner regained full use of the carport entrance, eliminated a major trip hazard, and avoided the cost of replacing the slab. The repaired area is now level, stable, and fully supported for long-term durability.

To safely bring the slab back to its original height, we used a coordinated method of polyurethane lifting foam and manual lifting jacks working together at the same time. Because the slab had dropped nearly six inches and was unsupported due to washout, it was important to lift it in a way that distributed pressure evenly and avoided placing unnecessary stress on the concrete.

We began by placing lifting jacks along the settled edge of the slab to provide gentle upward support. At the same time, we drilled small injection points and introduced high-density polyurethane foam beneath the slab. As the foam expanded, it filled the voids, rebuilt the sub-base, and provided lifting force from below. Working in tandem, the jacks allowed us to guide the slab into the correct position while the foam supported the lift from underneath.

By adjusting the jacks incrementally as the foam expanded, we ensured the slab rose smoothly, evenly, and without cracking. This dual-support approach allowed us to control both the pace and the angle of the lift with precision. Once the slab reached its proper elevation and alignment with the carport, the foam cured, creating a long-term, load-bearing foundation beneath the newly restored slab.