Signs Your Concrete Floor Needs Leveling: What to Watch For

Signs Concrete Needs Leveling

Concrete floors are built to last, but they can develop uneven surfaces, cracks, and sinking areas over time due to natural settling, moisture issues, or poor installation. An uneven concrete floor can lead to safety hazards, structural damage, and costly repairs if left unchecked.
So, how do you know when your concrete floor needs leveling? Here are the key warning signs to watch for and why addressing these signs early can save you money and headaches in the long run.

1. Visible Cracks in the Floor

Cracks in a concrete floor are one of the most obvious indicators of an issue. While hairline cracks may be purely cosmetic, larger cracks can signal underlying structural problems.

What Causes Cracks?

  • Soil Erosion: Water infiltration washes away the soil beneath the concrete, leaving voids that cause the floor to sink and crack.
  • Freeze-Thaw Cycles: Expanding and contracting soil due to seasonal temperature changes can create stress fractures.
  • Poor Compaction: If the soil isn’t compacted properly before installation, it may settle unevenly, leading to cracks.
  • Heavy Loads: Consistently placing heavy machinery, furniture, or vehicles on concrete can stress the slab, resulting in fractures over time.
  • Water Infiltration: If moisture penetrates the concrete and freezes, it expands, creating stress that leads to cracks.
 

If you notice spreading or widening cracks, it’s time to consider professional concrete leveling to restore stability before the damage worsens.

2. Uneven or Sloping Floors

Do you notice dips, humps, or sloping areas on your concrete floor? This could mean the slab is settling unevenly. An uneven floor is more than just an eyesore—it can create trip hazards and cause structural misalignment.

How to Check for Unevenness

  • Place a marble or ball on the floor and see if it rolls in a specific direction.
  • Use a leveling tool to check for variations in height.
  • If furniture leans or wobbles, it may indicate that the floor is not level.
  • Walk around and feel for dips or raised sections.
 

Uneven concrete can often be corrected with polyjacking, a fast and minimally invasive technique that lifts and stabilizes the slab.

Illustration of how polyjacking is performed

3. Doors and Windows No Longer Close Properly

If your interior doors drag on the floor or windows stick, your concrete floor may have shifted. Floors that settle unevenly can alter the alignment of walls, doors, and windows, making them difficult to operate.

What’s Happening?

As the floor shifts, it puts pressure on your home’s framework, causing distortions in doorways and window frames. This could be an early sign of foundation settlement that needs immediate attention.

  • Check for gaps in door frames or misaligned window locks.
  • If your door sticks in the winter and is loose in the summer, a shifting foundation could be affecting the door frame.
  • Look for diagonal cracks near door and window corners, as these indicate stress from uneven settling.
Polyjacking process

4. Gaps Between the Floor and Walls

If you notice gaps forming between your floor and baseboards or walls, your slab may be sinking or shifting due to soil instability.

What Causes Floor Gaps?

  • Expansive Soil: Clay-heavy soil expands when wet and shrinks when dry, causing movement under the slab.
  • Erosion from Water Leaks: Plumbing leaks beneath the slab can wash away supporting soil.
  • Improper Installation: If the concrete wasn’t poured or cured correctly, it may separate from the walls over time.
  • Foundation Movement: As the foundation shifts, it can pull the floor away from the walls, creating gaps.

Ignoring these gaps can lead to increased instability and further foundation damage. Polyurethane foam injection (polyjacking) is an excellent solution for stabilizing the floor and preventing further movement.

Polyjacking process

5. Water Pooling or Drainage Issues

Water pooling on your concrete floor, particularly in low spots or corners, could indicate an uneven surface preventing proper drainage.

Why Water Pooling is a Problem

  • Standing water can weaken the concrete, leading to faster deterioration.
  • Moisture buildup can cause mold growth and structural weakening.
    If left untreated, water infiltration can lead to subfloor damage or foundation issues.
  • Poor drainage can create a slippery surface, increasing the risk of falls.

Fixing an uneven concrete floor ensures proper drainage, reducing the risk of long-term water damage.

Discover how sidewalk leveling can prevent trip hazards.

6. Increased Tripping Hazards

Have you noticed that you or your family members trip over certain spots in your home more often? Even small height differences between slabs can create a serious hazard.

Common Tripping Areas:

  • Entryways
  • Hallways
  • Near kitchen counters and islands
  • Basement floors
  • Garages and warehouse spaces

Uneven concrete is a major liability risk for commercial properties, increasing the chances of slip-and-fall accidents. Polyjacking offers a long-lasting solution to eliminate these hazards by restoring a smooth, level surface.

Causes of uneven concrete

7. Noise When Walking on the Floor

If your concrete floor makes hollow or creaking sounds when you walk on it, there may be voids beneath the slab.

Why Does This Happen?

  • Soil settlement can create air pockets under the floor.
  • Water erosion can wash away soil, leading to unsupported sections of concrete.
  • Weak spots in the slab may flex when weight is applied, producing a creaking sound.
  • Hollow sounds could indicate a previous failed repair where the fill material has deteriorated.

Filling these voids with polyurethane foam injection restores support and eliminates the risk of sudden slab failure.

Don’t Ignore the Signs—Get a Free Inspection!

If you’ve noticed any of these warning signs in your Atlanta, GA Metro area home or business, don’t wait until the problem worsens. Signature Polyjacking offers expert concrete leveling services to restore your floor’s stability and safety.

Call now to schedule a FREE consultation and get a personalized repair plan!

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