Concrete Leveling

Polyurethane Foam Injection

In recent years, the use of expanding polyurethane foam instead of a slurry has become a common alternative to traditional mudjacking. Using polyurethane to lift concrete is often referred to as “polyjacking.” The process for  both methods is similar. First, holes are drilled in the slab that’s being raised. Then, the material is injected through the holes to fill the voids beneath the slab. Finally, the holes are patched once the solution has cured. The weight of the material used to raise sunken concrete makes a significant difference in how long the repair

will last. The weight of heavy concrete on top of weak or eroded soil is typically what causes a slab to settle in the first place. Adding additional weight on top of this can cause further settling and sinking. Mudjacking slurry can weigh as much as 100 pounds per cubic foot. In comparison, expanding polyurethane weighs between 2 and 4 pounds per cubic foot.

What the concrete looks like after the leveling is complete is important. The two-part polymer material used in polyurethane foam leveling is injected through holes that are 5/8” or smaller - about the size of a penny. Mudjacking holes are typically between 1” and 2” - about the size of a soda can. The smaller hole size required

for polyurethane injection often provides a cleaner, more attractive concrete surface. When you’re dealing with uneven concrete surfaces around your home, it’s important to consider your repair options and invest in a solution that’s going to give you a long-lasting and attractive result that can increase the value of your home. Handy homeowners can handle some concrete repair jobs, however, concrete leveling and

concrete lifting should be left to a professional.