Guidance snapshot
Parts of the surface have dropped, shifted, or become uneven underfoot.
Sinking usually means the sub-base has failed, washed out, or was never adequate. A repair specialist will need to assess whether a targeted lift-and-relay or a full sub-base rebuild is required.
Watch-outs
- A cosmetic patch on a failing sub-base will re-sink within months
- Check for nearby tree roots or drainage runs that may be the cause
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