A Heavier Lift for Bigger Voids
Slab and Mud
Jacking
in Maryland
A proven, heavier lift for sunken slabs, sidewalks, driveways, garage floors, and patios raised back toward grade
Mud jacking pumps a cement based slurry beneath a sunken slab, filling the void underneath and lifting the slab as the material builds up. OBW confirms what caused the void before recommending a lift.
A Void Below, A Slab Above
Why Slabs Sink, and How
Mud Jacking Raises Them Back
A concrete slab sinks when the soil directly beneath it erodes, washes out, or consolidates, leaving a void the slab is no longer fully supported by. In Maryland, this is common where drainage concentrates water beneath a sidewalk or driveway slab, or where fill soil under a garage floor was never fully compacted. Mud jacking fills that void with a pumpable cement slurry, raising the slab as the material builds up beneath it.
The technique has been used for generations on exterior slabs. It's a heavier, more traditional alternative to polyurethane foam injection, well suited to larger slabs where the added weight of the slurry isn't a concern for the soil already supporting it.
A sunken slab section, void beneath from soil erosion, before mud jacking lift
Where Mud Jacking Applies
Signs a Slab Needs
to Be Lifted
- A sidewalk, driveway, or patio section noticeably lower than the adjacent slab
- A garage floor slab that's dropped at one corner or edge
- A hollow sound when you knock on the slab, suggesting a void beneath it
- A trip hazard where two slab sections no longer meet at the same height
What's Included
OBW's Mud Jacking Process
Void Assessment
We confirm there's an actual void beneath the slab, and what caused it, before recommending a lift. Not every sunken slab needs mud jacking.
Access Hole Drilling
Small holes drilled through the slab at planned intervals give access to the void beneath without a full slab replacement.
Slurry Injection and Lift
Cement based slurry is pumped beneath the slab in controlled stages, raising it back toward grade as material fills the void.
Hole Patching
Access holes are patched and finished to blend with the surrounding slab once the lift is complete.
Common Questions
Mud Jacking Questions from
Maryland Homeowners
What is mud jacking and how is it different from polyurethane foam injection?
Mud jacking (sometimes called slab jacking) pumps a cement based slurry beneath a sunken slab through drilled access holes, filling the void and raising the slab back toward grade as the material builds up underneath it. It's a proven, heavier material that has been used for decades to lift sidewalks, driveways, garage floors, and patio slabs.
Polyurethane foam injection accomplishes a similar lift using a lightweight expanding foam instead of a cement slurry. Foam cures faster, requires smaller access holes, and adds much less weight to the soil it's resting on, an advantage where the original settlement was partly caused by soil that's already struggling to bear load. Mud jacking's heavier material can be the more economical choice for larger slabs where added weight isn't a concern.
Can mud jacking fix a slab that's cracked as well as sunken?
Mud jacking raises the slab's elevation, it doesn't repair a crack on its own. Where a settled slab also has a structural crack, OBW addresses the crack, sealing a stable one or stabilizing an actively moving one, alongside the lift so both the elevation and the crack are resolved in the same visit.
Not every sunken slab should be lifted. If the void beneath it formed from an unresolved drainage issue, lifting the slab without correcting that cause means the same void, and the same sinking, comes back. OBW checks the cause before recommending mud jacking.
Why Oriole
Why Maryland Homeowners Choose
OBW for Slab Repair
Cause Diagnosis First
We confirm what caused the void before lifting the slab. Lifting without addressing drainage means the same void can return.
Written Workmanship Guarantee
Mud jacking work is backed by a written workmanship guarantee, terms vary by service, ask your inspector.
No Subcontracting
OBW's own crew performs the work in-house, from assessment through the finished patch.
Family-Owned Since 1953
Founded by Frank Pirog Sr. in 1953. Amber Pirog leads the company today.
Slab Sinking? Get It Assessed.
Free inspection. Written quote. Ask your inspector which written workmanship guarantee applies to your repair.
Family-owned since 1953 · MHIC #4247 · Written Workmanship Guarantee