What is Polyurethane Concrete Slabjacking?

Polyurethane concrete leveling, or slabjacking, is a process that begins by drilling a series of 5/8” holes (approximately the size of a dime) through the top of the existing concrete slab. Polyurethane foam is then injected into each hole, penetrating and compacting the soil until a solid base is formed.  The foam will continue to expand to almost 10 times its size, lifting the concrete slab back to its original elevation. Polyurethane foam is injected into each hole to properly support the weight of the concrete and anything that may pass over it. After the slab is raised to the desired height, the holes are patched with a non-shrink grout and blended to match the existing concrete. There’s no downtime or waiting period required once the process is completed- the slab can be used right away.