Quick Answer
- Sidewalk and stoop work is driven by trip hazards, drainage, panel condition, public-walk rules, and safe transitions.
- Intact settled panels may be lifted; cracked, scaled, or heaved panels usually need replacement.
- Lead walks and stoops need safe rise, door clearance, and positive drainage away from the entry.
- Related sidewalk, stoop, and leveling questions are answered in the sidewalk FAQ hub.
- Open the sidewalks and stoops FAQ hub.
Slab Lifting With Slurry or Foam
- BG Concrete lifts sunken slabs - driveways, sidewalks, patios, garage floors, stoops - by foam (polyjacking) or slurry (mudjacking).
- Leveling costs 25-50% of replacement and most jobs finish in hours, usable same day with foam.
- Leveling fits intact slabs only; we quote replacement alongside when the slab is past saving.
Foam or Slurry: Which Lift Fits
Polyjacking (expanding polyurethane foam) fits driveways, garage floors, and anything that needs precise lift and same-day use - the foam is light, cures in minutes, and goes in through 5/8-inch holes that patch nearly invisibly. Mudjacking (sand-cement slurry) fits walks and patios at the lower price point; it's heavier and cures overnight. The trade-off is durability in clay: foam doesn't re-compress the soil that sank the slab, so its lift tends to hold longer here.
Lift the Slab, Fix the Cause
A slab sinks for a reason - downspout washout, drought-shrunk clay, never-compacted utility backfill. BG Concrete names the cause on the quote and fixes it as part of the job (downspout extensions, joint caulk, regrade), because lifting over an active washout is paying for the same lift twice. When a slab is cracked through, spalled out, or rocking on a failed base, leveling is the wrong spend - you'll get the replacement number on the same visit, with our straight recommendation.
Lifting Only Works When the Slab Is Worth Saving
Slab lifting fits concrete that has settled but stayed mostly intact. It does not fix shattered concrete, severe scaling, unstable washout, or a drainage problem that is still active. The decision is simple: if the slab is sound and low, lift it; if the slab is broken or the water source is unresolved, replacement is the honest repair.
The Cause Still Needs a Fix
Downspouts, negative grade, open joints, and clay shrinkage are common reasons slabs sink in the northwest suburbs. A lift quote should identify the likely cause and state whether caulking, grading, or downspout extensions are needed after the slab is raised.
How long does a lift last? With the cause fixed, foam lifts routinely hold 10+ years; unaddressed washouts re-sink in a few seasons regardless of method.
Trip hazards on a budget? Grinding a raised joint lip runs $100-$300 and is quoted where it's the right fix.
Free Leveling Assessment - Photos Get You a Same-Day Ballpark - 630-595-1518
Common Questions Before You Call
Which lift method fits which slab?
Mud slurry is cost-effective for sidewalks, patios, and low-risk slabs where larger patch holes are acceptable. Foam is better for driveways, garage slabs, steps, and tight access because it is lighter, expands quickly, and leaves smaller holes. The slab condition matters more than the sales label.
What happens during the work?
The crew marks the low areas, drills injection holes, pumps material under the slab, checks the lift as it rises, patches the holes, and cleans the surface. Most lifted exterior slabs can be walked on quickly; vehicle timing depends on method, weather, and patch cure.
What should be rejected?
Reject any leveling bid that does not identify why the slab settled. A lift over an uncorrected washout is a temporary cosmetic fix, especially around aprons, stoops, garage entries, and downspouts.
How should bids be compared?
Compare the total price against the written method, base or drainage correction, thickness where relevant, disposal, access limits, cure timing, and what is included. The better bid is the one that names the work that prevents failure, not the one with the lowest unexplained budget number.
Related Sidewalks and stoops Guides
More guides on sidewalks and stoops: Trip hazards, stoop transitions, public walk rules, panel replacement, lead walks, and leveling decisions.