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Cracks in Your Concrete Patio: What’s Normal, What’s Not, and What to Do About It

Few things cause more worry for homeowners than spotting a crack in their concrete patio. Is it a sign of a serious problem? Will it keep spreading? Does the patio need to be replaced?

The truth is that some cracking is normal with concrete, especially in North Texas, where clay soil and extreme weather put stress on outdoor slabs. But not all cracks are created equal. In this guide, we’ll explain why concrete cracks, which cracks are usually harmless, which ones deserve attention, and how proper installation helps reduce cracking.

Why Concrete Cracks

Shrinkage

As concrete cures, it loses moisture and shrinks slightly. This shrinkage can cause small cracks, especially early in a slab’s life.

Temperature Changes

Concrete expands in heat and contracts in cold. DFW’s hot summers and occasional freezes create repeated movement.

Expansive Clay Soil

North Texas clay soil swells when wet and shrinks when dry. This movement beneath a slab is one of the biggest causes of cracking in DFW patios.

Poor Base Preparation

A weak or improperly compacted base can allow sections of a slab to settle unevenly.

Missing or Poorly Placed Control Joints

Control joints are designed to guide cracking into straight, planned lines. Without them, cracks form randomly.

Lack of Reinforcement

Reinforcement helps hold concrete together. Without enough of it, cracks may widen or spread.

Heavy Loads

Patios supporting heavier items than they were designed for can crack.

Drainage Problems

Water pooling around or under a patio can soften soil and lead to settling.

Tree Roots

Roots growing beneath a slab can lift and crack concrete.

Types of Concrete Cracks

Hairline Cracks

Thin, surface-level cracks that are barely visible. These are often caused by shrinkage and are usually cosmetic.

Level of concern: Usually low.

Cracks Along Control Joints

Cracks that form within control joints are doing exactly what they’re designed to do.

Level of concern: Normal and expected.

Settlement Cracks

Cracks that occur when part of the slab sinks lower than the rest.

Level of concern: Worth watching, especially if one side is lower than the other.

Heaving Cracks

Cracks caused by soil or roots pushing the slab upward.

Level of concern: Can create tripping hazards and may need attention.

Widening or Spreading Cracks

Cracks that grow wider or longer over time.

Level of concern: Higher. These may indicate ongoing movement.

Map or Spiderweb Cracking

A network of small surface cracks, often related to surface finishing or curing conditions.

Level of concern: Usually cosmetic, but can affect appearance.

Signs a Crack Needs Attention

• The crack is getting wider or longer
• One side of the crack is higher than the other
• The crack creates a tripping hazard
• Water pools near the crack
• Water drains toward your home’s foundation
• Pieces of concrete are breaking off
• Many cracks are spreading across the patio

What to Do About Patio Cracks

Monitor Small Cracks

Take photos and note the size of small cracks. If they don’t change, they’re likely cosmetic.

Keep Drainage Clear

Make sure water drains away from your patio and home. Redirect downspouts if needed.

Consider Sealing Small Cracks

Sealing hairline cracks can help keep water out. Ask a professional about appropriate products.

Address Uneven Sections

If cracks create uneven surfaces or tripping hazards, repair or replacement may be needed.

Evaluate Replacement

When cracking is widespread, sections have sunk or lifted significantly, or drainage has changed, replacing the patio with proper preparation may be the best long-term solution.

How Proper Installation Reduces Cracking

While no concrete is completely crack-proof, quality installation greatly reduces problems.

Thorough site preparation. Removing unsuitable soil and grading properly.

A compacted base. Creating a stable foundation that helps resist soil movement.

Reinforcement. Helping the slab hold together.

Well-placed control joints. Guiding cracks into neat, planned lines.

Proper slope. Directing water away from the patio and home.

Careful curing. Allowing concrete to gain strength properly.

Concrete vs. Pavers for Crack Concerns

If you’re especially concerned about cracking, pavers may be worth considering. Because pavers are individual units, they handle soil movement without showing the same kind of continuous cracks. Many homeowners combine concrete and pavers to balance their benefits.

Frequently Asked Questions

Is it normal for a new concrete patio to crack?
Some minor cracking can be normal, especially hairline shrinkage cracks or cracks within control joints.

When should I worry about patio cracks?
Watch for cracks that widen, create uneven surfaces, or affect drainage.

Can cracked concrete be repaired?
Small cracks can sometimes be sealed. Larger problems may require section or full replacement.

How can I prevent cracks in a new patio?
Proper base preparation, reinforcement, control joints, and drainage all help.

Know the Difference, Protect Your Patio

Not every crack is a cause for alarm. By understanding which cracks are normal and which need attention, you can protect your patio and make smart decisions about repairs or replacement.