Start with what you’re seeing
Most concrete problems start the same way: the soil under a slab changes, and the slab follows it. What you notice on top depends on the slab and where the soil went. Pick the one that sounds most like your concrete. Each page explains what causes it, whether it can usually be lifted and what to do next.
Problems you can see or feel
These are the reasons most people call. Something dropped, tipped or started catching feet.
What’s going on underneath
These pages explain what’s happening under the slab. They’re useful if you’ve noticed a hollow sound, a gap along an edge or concrete that keeps moving.
Not sure which one you have?
It’s common to have more than one. A driveway panel that sank near the garage usually has a void under it, and water pooling on a patio is often a sign of settlement that started with washout. You don’t need to work out the exact cause before calling. That’s what the evaluation is for.
If you’d like to look things over yourself first, signs of concrete settlement is a walk-around checklist, and can sunken concrete be lifted? explains what makes a slab a good candidate for lifting.
Sunken
Concrete has settled or lost support.
Lifted
Polyurethane foam is injected beneath the slab.
Level
The slab is raised toward its proper position, and the void space is stabilized.
The question behind every problem
Whatever the symptom, the real question is the same: can this concrete be lifted, or does it need to be replaced? In a lot of cases, a sunken or tipped slab is still sound and can be raised back in line with foam. When it can’t, we’ll tell you straight, and explain why. The evaluation is free.