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Concrete Levelling
office@concretelevelling.co.uk
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Concrete-levelling checker

Work through a few short questions about the slab you are concerned about. The result gives an early indication of how likely it is that the ground beneath has settled. This is not a diagnosis: a level survey is the only way to confirm what is happening under the concrete.

Could it be sunken concrete?

Has a slab dropped below the one next to it, or below the edge it meets, leaving a lip you could catch a foot on?
After rain, does water pool on the concrete or run back towards the house?
Is a gap opening between the slab and a wall, step, kerb or door threshold?
Is there a downpipe or drain beside the slab, or was it laid on ground that was dug out and filled?
Has the slab sunk further or started rocking in the last year?

Request an assessment to have a specialist confirm it. This result is a first indication only; the actual answer comes from an assessment on site.

How the levels read

  1. Low likelihood What you have described sounds minor and may be cosmetic, such as surface weathering or hairline cracking with no step between slabs. Monitor it and check again after the next period of heavy rain.
  2. Possible The combination of signs is worth investigating properly. A level survey will show whether the slab has moved and whether there is a void beneath it that needs filling.
  3. Worth investigating The signs you have described suggest settled concrete with ground loss below. Arranging a survey sooner rather than later usually means less material is needed and the job stays smaller.

Look-alikes

  • Surface spalling: Surface spalling, pitting or flaking on the top face of the slab is caused by frost or de-icing salt acting on the concrete, and the slab may still be sitting perfectly level.
  • Shrinkage cracks: Fine shrinkage cracks running across a slab where both faces remain flush are a normal feature of concrete drying and do not indicate that the slab has moved.
  • Root heave: A slab pushed up by tree root growth has the opposite problem from settlement, and the roots usually need to be addressed before any levelling work can be considered.

Ready to sort your concrete levelling job?

Describe what you have found, choose the service that fits, and a specialist covering your area will reply with the next step and how the work is priced.

  • Residential, commercial and infrastructure jobs
  • Pricing depends on the job, quoted per enquiry
  • Serving enquiries from across the United Kingdom

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