Is Your Sidewalk Sinking? Here's Why It's Settling

What it costs to repair a sinking sidewalk depends on the extent of settlement, the number of affected slabs, accessibility and whether additional repairs are recommended for drainage or other underlying issues. In many cases, concrete lifting is more affordable than replacement because it restores the existing sidewalk without demolition or lengthy construction. Scheduling a free inspection is the best way to pin down the most cost-effective repair for your specific situation. 

If the underlying cause of settlement is properly addressed, PolyLevel® offers a long-lasting repair built to support the sidewalk for years to come. How it performs depends on soil conditions, drainage and the overall condition of the concrete. As part of your inspection, Blackburn Foundation Repair will review these factors and recommend the most effective repair for lasting results.

Yes, and often more than people expect. Even a minor height difference between slabs can create a trip hazard for family members, guests, neighbors and delivery drivers. Homeowners are often surprised how little settlement it takes to create an unsafe walking surface. Uneven walkways may also be more difficult to navigate with strollers, wheelchairs or other mobility aids. Because settlement tends to get worse over time, handling the problem early helps improve safety and may avoid more extensive repairs later. 

Often, yes. When the concrete is still structurally sound, PolyLevel® can lift and level settled sidewalk slabs without the cost and disruption of replacement. Expanding polyurethane foam is injected under the concrete to fill voids, stabilize the soil below and raise the sidewalk toward its original position. An in-person professional inspection determines whether lifting or replacement is the best long-term solution. 

Sidewalks most often sink when the soil beneath the concrete can’t provide consistent support. Poorly compacted fill, natural soil settlement, erosion, water washing out supporting soils, freeze-thaw cycles and expansive clay soils can all create voids or shift the ground. As support under the slab weakens, sections of the sidewalk slowly settle and turn uneven.