Sunken, heaved or flaking concrete around Indianapolis can often be lifted with mudjacking or foam, sealed, patched or resurfaced. Fix the water source too, since wet soil and frost drive much of the movement here. Badly scaled, broken or repeatedly heaving slabs are often better replaced with air-entrained concrete.
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A lot of damaged concrete around Indianapolis can be repaired instead of replaced. A sunken walk can often be lifted, a cracked driveway joint sealed, and a lightly scaled surface resurfaced. The trick is matching the fix to the cause, and in central Indiana the causes are usually water, frost, salt and soft fill.
Why concrete fails in central Indiana
- Frost heave. Wet soil that freezes expands and lifts slabs, often unevenly. When it thaws, the slab may not settle back where it was.
- Poorly drained soils. Many common soils in the metro hold water near the surface for part of the year, which weakens support and feeds frost heave.
- Settling fill. Backfill next to foundations, garages and stoops often wasn't compacted well and keeps settling for years.
- Washout. Downspouts and sump discharge can carry soil out from under slab edges.
- Salt scaling. Freeze-thaw cycles plus deicing salt flake the surface, especially on concrete that wasn't air-entrained or was finished with extra water.
- Tree roots. Mature trees in older neighborhoods lift walks and driveway edges.
Repair options
- Mudjacking: a cement-based slurry is pumped under a sunken slab through drilled holes to lift it and fill voids.
- Polyurethane foam lifting: an expanding foam injected through smaller holes. It's lightweight and cures quickly.
- Crack and joint sealing: flexible sealants keep water, and the freeze-thaw damage it brings, out of the base.
- Patching: repair mortars for spalls and popouts, though color rarely matches.
- Resurfacing: a thin cement-based overlay over a scaled but structurally sound slab.
- Section replacement: cutting out broken panels at the joints and repouring them.
Timing repairs around winter
Many lifting and sealing jobs can be done much of the year, but some products and overlays have temperature limits, and lifting a slab while the ground is frozen or still heaved can give a false result. Late spring, after the ground has thawed and settled, is often a good time to judge what moved. Ask the contractor about the temperature range for the products they use.
When lifting makes sense
Lifting works best when the slab is mostly intact, sank as one piece, and the soil below has stopped moving. A slab that heaves every winter needs its drainage fixed, not just lifting. Extending downspouts, redirecting sump lines and regrading should be part of the plan.
Is the flaking fixable?
Scaling is a surface problem. If the concrete underneath is sound, resurfacing can renew it, but an overlay on a slab that's still taking salt every winter can fail too. If scaling covers most of a driveway and goes deep, replacement with an air-entrained mix is often the longer-lasting answer. Our guide to salt and freeze-thaw damage explains the difference.
Trip hazards and public sidewalks
Offset joints on walks are a common cause of falls. Contractors can lift the low side, grind the high edge or replace the panel. If the hazard is on a public sidewalk, check with your city or town first: in Indianapolis and most suburbs, any work in the right-of-way needs a permit.
When it might be structural
Cracks in a driveway or patio are rarely structural. Cracks in foundation walls, a basement that has started leaking along new cracks, or doors that suddenly stick can point to foundation movement. Have a structural engineer or foundation specialist look first.
Questions to ask
- What caused this, and how does your repair address it?
- Lift, patch, resurface or replace, and why?
- What will the drill holes or patches look like?
- Is there a warranty if the slab settles or heaves again?
Have a sunken slab or a trip hazard in the Indianapolis area? Mark it urgent and request a concrete repair contractor.
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Frequently asked questions
Should I wait until spring to fix a heaved slab?
Often, yes. A slab lifted by frost may move again as the ground thaws, so judging it after the ground settles in spring gives a truer picture. A trip hazard should still be marked or temporarily addressed right away.
Is mudjacking or foam lifting better?
Both can raise a sunken slab that's otherwise intact. Foam uses smaller holes, weighs less and cures fast; cement-based mudjacking is a long-established method. The right choice depends on the slab, the voids and the contractor's experience.
Can resurfacing fix salt damage?
If the slab is structurally sound and the scaling is shallow, a resurfacing overlay can renew it. If scaling is deep and widespread, replacement with an air-entrained mix is usually the longer-term fix, and either way keeping salt off helps.
Sources and further reading
- American Concrete Institute (ACI)
- Portland Cement Association (PCA)
- City of Indianapolis: Driveway Permits
- City of Indianapolis: Right-of-Way Permits
- City of Indianapolis: Infrastructure and Right-of-Way
- City of Indianapolis: Contractor Licenses
- City of Carmel Engineering: Right-of-Way Information
- City of Carmel Engineering FAQs
- City of Fishers: Right-of-Way Contractor Registration Instructions
- City of Noblesville: Encroachment Permit Applications
- City of Noblesville: Residential New Construction Standards
- City of Westfield: Apply for a Permit
- Town of Zionsville: Right-of-Way Management and Permits
- City of Greenwood: Right-of-Way/Street Cut Permit Application
- Purdue Extension: Indiana Soils, Evaluation for Agriculture and Home Sites (ID-72)
- Encyclopedia of Indianapolis: Geology
- Purdue Joint Transportation Research Program: Concrete Pavement and Deicing Salts
- Indiana Attorney General: Storm Chaser and Home Improvement Contract Tips
- Indiana Office of Utility Consumer Counselor: 811 Call Before You Dig
- Indiana 811
- Citizens Energy Group: Permits and Forms