Sunken concrete is a slab that has dropped below its original elevation because the soil beneath it eroded, compressed, or washed away, leaving the surface low, uneven, or tilted.
In depth
Sunken concrete is the visible outcome of settlement. It shows up as sidewalks that dip, driveways that slope toward the house, patios that pull away from the foundation, and garage or interior floors that have dropped. Beyond appearance, sunken slabs create trip hazards, pond water in the wrong places, and can direct drainage toward a building.
The repair is concrete raising: injecting foam to fill the void and lift the slab back to level, which restores both function and appearance at a fraction of the cost of replacement.
How Acme applies it. Acme specializes in lifting and leveling sunken concrete across sidewalks, driveways, patios, pool decks, porches, steps, and interior floors throughout the Chicago area.
Related terms: Concrete Settlement, Concrete Leveling, Under-Slab Void, Trip Hazard
Frequently asked questions
Why is my concrete sinking?
Because the soil supporting it has failed, most often from erosion, poor compaction, expansive-soil movement, or voids from leaking utilities. The slab drops into the space left behind.
Can sunken concrete be raised instead of replaced?
In most cases, yes. Polyurethane raising lifts the existing slab back to level in hours and typically costs far less than tearing out and repouring.