Having to replace a section of sidewalk can be costly and inconvenient, but it is nothing compared with having to replace a compromised garage slab. In addition to the hefty price tag, homeowners have to remove everything from the garage for a period of a few weeks while construction is underway and must have their home accessible to large machines for excavation and repouring. While this process is certainly occasionally necessary, garage floor replacement should be seen as a last resort.
The two main causes of garage floor settlement are inadequate soil compaction/insufficient reinforcement by the original builders and soil shifting underneath the slab. With either of these initial causes the concrete slab is perfectly fine; it is merely a matter of the soil beneath the slab being compromised. Because of this the process used to stabilize a garage floor slab by polyurethane foam lifting is the exact same as for sidewalk lifting or driveway lifting, just on a larger scale.
By injecting expanding foam throughout a garage, the compromised soil underneath can be reinforced to avoid future settlement and the garage slab lifted back up to its original position. Total work time for garage leveling projects is generally between 1-3 hours, and nothing has to be moved from the garage except for vehicles and anything blocking our technician from injection points. When we’re done, the only visual evidence of work having been performed are the penny-sized holes that are filled with a color-matching grout.
While garage lifting is a great option for garage settlement, it can not fix everything. Other common garage problems include excessive cracking and crumbling without any settlement. This is generally caused by poor concrete mix, erosion from salt brought in on car tires, and excessive temperature fluctuations. For these problems, the concrete will either have to be resurfaced if it is salvageable or otherwise replaced through demolition and repour.