Mudjacking, slabjacking, polyjacking: the same job
Mudjacking (some write it mud jacking) is the most-searched name for this work around Green Bay, and plenty of people use it to mean any slab lifting. If that's what you searched, you're in the right place: the job is the same, the material under the slab is different.
Mudjacking, slabjacking, concrete jacking, polyjacking and concrete leveling all mean the same thing: filling the space under a sunken slab and using that fill to push the slab back up. The difference is what goes under it. Mudjacking pumps a cement-and-soil slurry through large holes. We use two-part polyurethane foam, which goes in as a liquid through small ports and expands under the slab.
Polyjacking vs. mudjacking: why we use foam
| Foam (what we use) | Mudjacking | |
|---|---|---|
| Hole size | About 5/8 inch | About 1½–2 inches |
| Weight added to the soil | About 2–5 lb per cubic foot | About 100–150 lb per cubic foot |
| Ready for cars | Same day | Usually 24–48 hours |
| Where water runs under the slab | Won't wash out | Can erode over time |
Northeast Wisconsin slabs mostly sink because water washed the soil out or loose backfill settled. Heavy slurry adds load to that same weak soil; foam barely adds any, and it doesn't wash out the next time water gets under the slab.
3D render, not a job video. The ground is cut away so you can see under the slab; nothing is dug on a real job. Simplified to four ports; a real 10 by 10 foot section usually gets six to ten. The foam's weight, strength and set time, with sources, are in how foam lifting works.
What we lift
Sunken sections, the lip at the garage door, water pooling against the house.
Trip hazards at the joints, sections that hold puddles.
Slabs that tipped toward the house and send rain at the foundation.
Stoops pulled away from the wall, porches settled under the roof.
Was your slab mudjacked before?
Old mudjacking jobs often settle again where water got under the slurry. Foam can usually go in around or through the old material, and the old large holes get patched while we're there.
Mudjacking cost vs. foam lifting cost
National cost guides put mudjacking at about $3 to $6 per square foot and foam lifting at about $5 to $25. Every slab is different, so we price from photos: send a few and you get a firm price for the foam job. See concrete leveling cost for what goes into it.