See thin lines on your driveway or basement floor? Concrete cracks are common, but not all cracks are the same. Some are harmless; others point to bigger issues. Knowing the difference helps you act early, save money, and keep your home safe. A trusted local contractor can guide you.
Why Cracks Happen?
Concrete shrinks as it cures. Weather swings make it expand and contract. Soil can settle or swell with moisture. Heavy loads and poor drainage also add stress. Over time, these forces can open up small gaps.
Common Types You May See
- Hairline cracks: very thin, often from normal shrinkage.
- Map or pattern cracks: a web of tiny lines from surface drying.
- Settlement cracks: wider, often where the ground moved.
- Joint cracks: along control or expansion joints if they were spaced poorly.
When to Worry?
Watch for cracks wider than a nickel, edges that are uneven, or lines that grow longer or wider. Water seeping through, musty smells, doors sticking, or new drywall cracks nearby are also warning signs. These can signal movement below the slab or in the foundation.
Fix It the Right Way
Small, stable cracks can often be cleaned and sealed to keep out water and salt. Wider or active cracks may need epoxy injection, routing and sealing, or even slab lifting if the base has settled. A licensed contractor can tell structural issues from simple cosmetic ones and suggest a safe, lasting fix.
Prevent Future Cracks
Good drainage is key, keep gutters clear and slope soil away from the house. Use control joints at the right spacing. Let the new concrete cure well and keep it moist in the first week. Seal exposed surfaces to block water and de-icing chemicals. Plant trees away from slabs so roots don’t push up.
Cracks will show up sooner or later. The goal is to spot the “problem” ones fast and treat the cause, not just the line you see. We can assess, repair, and help you prevent a repeat, so your concrete stays strong and looks good for years.