Crack in Driveway Repaired - Knoxville, TN
Challenge
This Knoxville driveway had a long, noticeable crack stretching nearly the full length of the slab, reaching from the garage toward the road. Over time, soil movement beneath the concrete had caused the slab to settle unevenly, leading to a visible drop and separation along the crack. Not only was it an eyesore from the curb, but it also created a tripping hazard for the homeowners and their guests.
What made this project more complex was that the crack didn’t just affect a single panel—it extended across multiple slabs. This introduced a challenge in keeping each section level with the others during the repair process. If one portion was lifted even slightly more or less than the others, it would have created new uneven points or even caused additional cracking. It was a subtle issue, but one that required a precise, skilled approach.
Solution
To address the issue, we used polyurethane foam injection—commonly known as poly leveling. This method involves drilling small holes into the affected concrete and injecting expanding foam underneath. As the foam expands, it fills voids caused by soil erosion and gently raises the slab back to its original position. It’s a clean, efficient solution that doesn’t require demolition or replacement.
Because the crack spanned across multiple slabs, our team injected the foam slowly and in stages. We monitored the lift in real-time to ensure each section rose evenly, making continuous adjustments as needed. This careful approach allowed us to restore the alignment across the entire driveway while preventing stress on the surrounding concrete. The entire process was completed in less than a day with minimal disruption to the homeowner’s routine.
The end result was a smooth, stable, and visually restored driveway. The long crack was no longer visible, and the slabs sat flush with one another—removing the trip hazard and bringing the appearance of the property back to life. The homeowner now has a safer, cleaner space for walking, parking, and enjoying their front yard without concern.
Even more importantly, the job demonstrated how proper technique and attention to detail make all the difference in concrete leveling. A less precise approach could have led to uneven lifting or further cracking, but our team’s careful planning and execution delivered a long-term solution the homeowner could count on.
