Common Causes of Concrete Cracks
Base and soil
Loose fill, poor compaction and expansive soils under the slab all affect cracking.
Drainage
Water finding its way under the slab can wash out base materials and create voids.
Loads and use
Heavier vehicles, added weight from a structure above or shifting use can stress a slab that was not designed for the load.
Joint placement
Control joints are meant to guide where cracking happens. When they are missing or poorly placed, cracks tend to form somewhere else.
Hairline Cracks Versus Structural Cracks
Shrinkage cracks
Fine hairline cracks that show up as concrete dries. Common and often cosmetic.
Settlement cracks
Cracks that appear when the ground under the slab moves or compresses. May widen over time.
Structural cracks
Wider, connected cracks — often with movement between sides — that suggest a load or base problem.
When a Crack Should Be Inspected
Growing or widening cracks
Cracks that lengthen or open over time deserve a closer look.
Vertical displacement
One side of a crack sitting higher than the other often points to movement below the slab.
Water involvement
Water pooling near, or running into, a crack accelerates damage and warrants inspection.
Concrete Repair and Replacement Options
Sealing and patching
Cosmetic cracks are often addressed with sealing or targeted patching.
Section replacement
A single failed panel can sometimes be replaced without redoing the entire slab.
Full replacement
Broad cracking, ongoing movement or base failure usually points to replacement as the more durable option.
Frequently Asked Questions
Are hairline cracks a problem?
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Most fine surface cracks are cosmetic. They still deserve a look if they widen or start showing signs of movement.
Can cracks be sealed permanently?
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Sealing can improve appearance and reduce water entry, but it does not stop movement below the slab.
Request a Concrete Evaluation
Call (254) 414-0511 or use the estimate form to share your project details. We follow up to review your project and next steps.