Mudjacking raises sunken concrete by pumping a cement-based slurry beneath the slab, while foam leveling uses an expanding polyurethane material to fill voids and lift it. Both aim to bring suitable settled concrete back toward level, but they differ in material weight, access holes, how quickly the area can be used and which projects they suit.
Both methods are common for sidewalks, driveways, patios, steps and garage floors. The best fit depends on the slab and the conditions beneath it.
How Mudjacking Works at a High Level
Mudjacking, also called slabjacking, places a heavy slurry under the slab through holes in the concrete. The material fills empty spaces and pushes the slab upward.
It is a long-used method. Because the material is heavy, it adds weight to the soil below, which may matter on some sites. The holes are typically larger than with foam.
Mudjacking is often used on sidewalks, steps and driveway sections, and it is still a common choice in many areas.
How Foam Leveling Works at a High Level
Polyurethane foam leveling injects a liquid material that expands into a lightweight foam under the slab. It fills voids and lifts the concrete as it expands.
Foam adds little weight to the soil, uses smaller holes and often allows the area to be used sooner. It is usually priced differently than mudjacking.
Some property owners prefer foam because the holes are less noticeable once they are patched.
What Both Methods Have in Common
Either method only works on concrete that is a good candidate. Slabs that are badly broken, crumbling or have very large height differences may not lift well, and they may crack further during lifting.
Neither method fixes the cause on its own. If water, poor drainage or soil changes caused the settling, those conditions may keep affecting the slab. In Michigan, downspouts, grading and freeze-thaw activity are worth checking.
Either way, the holes are patched afterward, though patches may remain somewhat visible on the surface.
Choosing Between Them
Factors include the slab’s condition and location, soil and moisture, how soon the area needs to be used, the size of the holes you are comfortable with and budget.
A contractor should look at the concrete in person before recommending either one. In some cases, concrete replacement may be the better path.
Leveling is professional work. It is not a DIY project, since lifting concrete without the right equipment and experience can crack slabs or create voids.
Asking how each method would handle your slab, and what results to expect, can make the comparison easier.
If your concrete has sunk and you are comparing methods, an on-site evaluation can help determine whether leveling may be suitable. Learn more about our concrete leveling services in Kalamazoo, or call (269) 404-2457.
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