Mudjacking vs. Concrete Replacement: Which Does Your Slab Actually Need?
Here's the honest fork in the road: sunken-but-sound concrete can be lifted for a fraction of replacement cost. Failing concrete can't be saved by any injection. This is the test — and it holds whether you lift with mud or with foam.
"The Test"
The Test: Is the Slab a Victim or a Casualty?
Lift it if…
The slab is structurally intact and simply sank. Cracks, if any, are few and clean. Sections have settled or tilted, but the concrete surface itself is solid. This is a soil problem wearing a concrete costume — lifting solves it.
Replace it if…
The concrete itself is failing: crumbling edges, surface flaking (spalling), a web of cracks breaking it into pieces, or a bad original pour. Lifting broken concrete just gives you level rubble.
"WHAT's a better option?"
What Each Path Really Costs
| Lifting (mud or foam) | Full replacement | |
|---|---|---|
| Typical driveway cost | $600 – $2,500 | $5,000 – $10,000+ |
| Time without the slab | 15 min (foam) – 3 days (mud) | 5 – 10+ days incl. cure |
| Disruption | A few small holes | Demolition, haul-off, forms, landscaping repair |
| Appearance after | Your existing, aged concrete — level | Brand-new surface (won't match adjacent old slabs) |
| Addresses the soil? | Foam stabilizes it; mud adds weight to it | No — new slab on the same soil can sink too |
That last row is the one homeowners miss: replacement pours new concrete onto the same soil that sank the old one. Without fixing the ground or the water, you can buy a $9,000 slab and the original problem.
"What's The Answer?"
If Lifting Wins, You Have One More Choice
Lift-or-replace is decision one. If the answer is lift, decision two is the material — the century-old slurry method or polyurethane foam. That choice drives hole size, cure time, and how long the fix lasts in KC clay: the full comparison →
Kansas City Mudjacking Questions, Answered Straight
Can badly cracked concrete be lifted?
A slab with one or two clean cracks usually lifts fine — each piece is raised and matched. A slab fractured into many pieces can’t be stabilized by lifting and should be replaced.
Will brand-new replacement concrete sink too?
It can, and around here it does — new concrete on unstable clay inherits the old slab’s problem. Whatever you choose, fix the water: downspouts, grading, joint sealing.
Do you do concrete replacement?
No — we lift. If your slab needs replacement, we’ll tell you plainly at the estimate and you’ll have lost nothing but half an hour.