10 signs you need polyjacking
If you spot any of these, your concrete is settling — and the longer you wait, the more expensive the fix becomes.
- 1
Trip hazards on sidewalks or driveways
Any vertical lip over 1/4" is a fall risk and is often considered a liability hazard for homeowners.
- 2
Water pooling on a flat slab
Driveways, patios, and pool decks should drain. Standing water means the slab has settled.
- 3
Gaps where the slab meets the foundation
When porches, steps, or garage approaches sink, you'll see a visible gap pulling away from the house.
- 4
Sloping garage floor
If a ball rolls toward the back wall on its own, your floor has dropped — usually toward the foundation footing.
- 5
Cracked or separated control joints
Joints that have widened or stepped vertically signal differential settlement.
- 6
Doors that drag at the threshold
Front entry doors that suddenly catch on the threshold often mean the porch slab beneath has shifted.
- 7
Hollow sound when tapped
A hollow ring under your concrete almost always means there's a void underneath waiting to collapse.
- 8
Cracked pool coping
Pool deck settlement first shows as gaps and cracks at the coping line.
- 9
Visible stairstep cracks in walkways
Diagonal stair-step cracks are settlement signatures, not just normal aging.
- 10
Recent washout or plumbing leak
If you've had a downspout, irrigation line, or service line leak near your slab, voids are forming right now.
What to do next
Take a clear photo of the affected slab from multiple angles, measure any vertical drop with a level, and submit a free quote. Most cases are resolved in a single 2–4 hour visit.