Subsurface voids
Water erosion, decayed roots, and settling fill leave hollow pockets under the slab. The concrete sags or cracks into the gap, and the void keeps growing as water moves through it.
Concrete Leveling · Problem Signs · Since 2011
Concrete does not become uneven. The ground under it does.
Tilted, sunken, or offset slabs mean the soil below stopped providing even support. Here is how to read the movement and what actually corrects it.
Let's take the first step toward solid ground.
A local specialist will evaluate your foundation, walk you through the findings, and send a clear estimate. No cost, no pressure.
What this symptom means
Uneven Concrete Slabs: diagnosed and explained.
An uneven slab is the visible half of an invisible problem. Concrete is poured level and stays level as long as the soil beneath supports it evenly. When part of that soil compresses, shrinks, or washes away, the slab tilts toward the weak spot, sinks across a section, or cracks and offsets where the supported half meets the unsupported half. You will notice a patio that slopes where it never used to, a walkway panel sitting below its neighbor, a low spot in the garage floor that collects water, or a step forming between two slabs that were poured flush. In our region the movers are familiar: expansive clay swelling and shrinking with the seasons, subsurface voids left by erosion or decayed roots, fill soil that was never compacted, and drainage that soaks one side of a slab while the other stays dry. The direction and pattern of the unevenness is diagnostic, which is why we measure elevations before recommending anything. A slab that is uneven but structurally sound can almost always be lifted back to level without demolition.
For the repair side of this, the concrete leveling solutions page lists every method Dalinghaus installs, including the ones that fix problems other than uneven concrete slabs.
Catch It Early
What to check alongside the unevenness
- Offsets at joints and cracks One side sitting higher than the other means differential movement is active, not historical.
- Water changing course Puddles in new places, or runoff heading toward the house, show the slab's slope has genuinely changed.
- A hollow sound underfoot Tapping that sounds like a drum instead of a thud means a void has opened under the slab and the concrete is bridging it.
- Nearby doors or fences going out of line If structures around the slab are also shifting, the soil movement may be broader than one slab, and worth measuring properly.
Most Common Causes
What causes uneven concrete slabs in regional homes.
Expansive clay soil
Clay swells when wet and shrinks when dry, and it rarely does either evenly. The slab tilts toward whichever section of soil is losing volume that season.
Poor base compaction
A slab poured over loosely compacted base settles as the material compresses, usually unevenly, producing the dips and offsets that concrete leveling corrects years after the pour, including under entry steps and landings.
Uneven moisture from drainage
A downspout or sprinkler zone that soaks one edge of a slab swells or erodes the soil on that side only, tipping the slab a little more with every cycle.
Repair Solutions
How concrete leveling specialists actually fix uneven concrete slabs.
Solving uneven concrete slabs means addressing the underlying soil, pressure, or settlement cause. Not just patching the visible damage. Below are the engineered solutions we install most often for this symptom in California, Arizona, and Nevada homes.
Why Choose Dalinghaus
Care and expertise from a team that's been doing this since 2011.
If your home is showing uneven concrete slabs, the team you call matters. Dalinghaus crews handle concrete leveling and related structural work across California, Arizona, and Nevada, and nothing else.
01
Specialized expertise.
Foundation repair, concrete leveling, and crawl space repair are our entire focus. Not a sideline.
02
Locally owned since 2011.
More than 2,000 projects on the clay and desert soils of California, Arizona, and Nevada since 2011.
03
Licensed in California, Arizona and Nevada.
CSLB License #983851 in California, ROC #330307 in Arizona, and License #0089738 in Nevada. Look us up with the state before we ever set foot on your property.
04
Warrantied solutions.
Warranty terms come in writing with every proposal, and the terms that apply to your job are stated in that job's paperwork. Ask your project specialist during the free evaluation.
Frequently Asked Questions
Answers to common questions about Uneven Concrete Slabs.
Don't see your question here? Our team is happy to help. Reach out anytime.
By restoring the support underneath it. We inject expanding polyurethane foam through small holes in the low sections, filling the void and lifting the slab back toward level in controlled increments. The holes are patched, and the surface is typically usable the same day.
Our Process
From uneven concrete slabs to a fixed home.
How a repair moves from free evaluation to completed work once uneven concrete slabs is diagnosed.
Step 01
Schedule your free evaluation.
A local specialist walks the areas showing uneven concrete slabs, measures what is moving, and answers your questions on site. No cost, no obligation.
Step 02
Get your written estimate.
The method is matched to the cause behind the uneven concrete slabs, with scope and pricing in writing. No pressure in either direction.
Step 03
Repairs, done right.
A Dalinghaus crew corrects the movement behind the uneven concrete slabs, and leaves the site cleaner than we found it.
Customer Reviews
More than 1,000 Google reviews across our offices, averaging 4.9 stars.
Before you call anyone about uneven concrete slabs, read how homeowners across California and Arizona rate our work.
Free Evaluation
Start with a free evaluation.
Share a few details and a local specialist will follow up as soon as possible to set your evaluation.
What to expect
- A local foundation specialist on site
- A complete walk-through of the findings
- A clear written estimate at no cost
- No obligation, no pressure
Prefer to call
877-360-9227Seeing uneven concrete slabs? Get the cause diagnosed.
A free evaluation pins down the cause: one visit, clear findings, written estimate.