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Concrete Repair & Leveling in Houston, TX

Quick answer

Cracked or sunken concrete around Houston can often be lifted with cement slurry or polyurethane foam, sealed, patched or resurfaced. Replacement is better when slabs are badly broken. Because shrink-swell clay, trees and drainage drive most movement here, any repair should address the cause, and cracks in the house itself warrant a structural engineer first.

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Sunken driveway panels, a patio that tilts toward the house and a walk with a raised edge are everyday sights in Greater Houston. Not all of them need to be torn out. Depending on the cause, concrete can often be lifted, sealed, patched or resurfaced for less money and disruption than replacement. The key is understanding why it moved, because a repair that ignores the cause tends to fail again.

Why concrete cracks and sinks around Houston

  • Shrink-swell clay. Much of the region sits on clay that swells when soaked and shrinks during droughts. Slabs rise and drop with it, and edges dry out first.
  • Trees. Large trees draw moisture out of the soil, which can make clay shrink under nearby slabs, and their roots lift walks and driveway edges.
  • Water. On flat lots, downspouts and runoff can wash sand and soil from under slab edges, and standing water softens the subgrade.
  • Loose backfill. Soil placed against foundations and over utility trenches during construction can settle for years.
  • Shrinkage. Some cracking is normal as concrete dries, especially where joints are too far apart.

Repair options

  • Slab lifting (mudjacking): a cement-based slurry is pumped under a sunken slab through drilled holes to raise it and fill voids.
  • Polyurethane foam lifting: an expanding foam is injected through smaller holes. It's lightweight and cures quickly.
  • Crack and joint sealing: flexible sealants keep water out of the base, which slows further damage.
  • Patching: spalled spots can be patched, though patches rarely match.
  • Resurfacing: a thin cement-based overlay renews a worn surface on a sound, stable slab.
  • Section replacement: badly broken panels are cut out at joints and repoured.

When lifting makes sense

Lifting works best when the slab is mostly intact, has sunk as a unit, and the cause has been dealt with. On clay that moves seasonally, a panel lifted at the end of a long drought can behave differently once wet weather returns, so ask the contractor how timing and soil moisture affect the result. Fixing drainage, such as extending downspouts or adding a yard drain, should be part of the plan.

Trip hazards

A raised joint on a walk or driveway is a common cause of falls. Contractors can lift the low side, grind the high edge, or replace the panel. If the hazard is on a public sidewalk, check with your city or county first. In the City of Houston, sidewalk and driveway work in the right-of-way generally needs a Houston Public Works permit.

When it might be the foundation

Foundation movement is a familiar topic in Houston because of the clay. Cracks in a driveway or patio are usually not structural, but cracks in the house slab or brick, doors that start sticking, or a gap opening between the patio and the house can point to foundation movement. In those cases a structural engineer's evaluation is the right first step. Some cities treat foundation repair as its own permit type; League City, for example, lists a separate foundation repair permit.

Questions to ask

  • What do you think caused this, and how will the repair address it?
  • Lift, patch or replace, and why?
  • How will drill holes or patches look afterward?
  • What happens if the slab settles again, and is there a warranty?

Not sure which way to go? Read how Houston clay affects concrete, or mark your request as urgent and request a concrete repair contractor.

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Why concrete cracks, and how control joints decide where. Press the buttons to run each step and see what happens inside. Made with Colorfigures ·
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Frequently asked questions

Why does my Houston driveway keep cracking?

Most often, clay under the slab swells when wet and shrinks during dry spells, especially near trees and along edges. Joints spaced too far apart, a thin base and poor drainage add to it. A repair that ignores the cause tends to come back.

Is mudjacking or foam lifting better?

Both can lift sunken slabs. Cement slurry is a long-established method; foam uses smaller holes, is lighter and cures quickly. The right choice depends on the slab, the voids and the contractor's experience.

Are cracks in my patio a foundation problem?

Usually not. Flatwork cracks are common. Cracks in the house slab or brick, sticking doors, or a widening gap between the patio and the house can point to foundation movement and are worth a structural engineer's look.

Sources and further reading

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