Settling / settlement Settling, also called settlement, is the downward movement of concrete caused by compression or movement of the supporting soil or base. It commonly leads to uneven pavement.
Settlement often occurs when underlying soil was not adequately compacted or when erosion creates voids beneath the slab. As support is lost, the concrete may crack, sink, or separate from adjoining sections. Long-term repairs usually require correcting the underlying foundation in addition to replacing damaged pavement.
Frequently Asked Questions About Settling / settlement
What causes sidewalk settlement?
Compression or movement of the soil beneath the slab, usually from inadequate original compaction, erosion creating voids, or disturbance from nearby excavation.
What does settlement look like?
Sunken or tilted flags, widening joints, cracking, and water ponding in the low areas.
Can a settled flag simply be replaced?
Replacing the concrete alone usually fails again. A lasting repair corrects the base and compaction beneath before the new flag is poured.
How is the underlying cause identified?
By checking for water sources such as leaking downspouts, utility leaks and poor drainage, and by inspecting base conditions once the slab is removed.