Why sinkholes and hollow areas form, and what a proper repair should investigate.
Where the material goes
Fill can escape through joints, penetrations, drainage outlets, toe gaps or damaged wall sections.
Why topping it up may fail
Adding soil at the surface does not close the pathway. Repeated settlement usually means the cause is still active.
What to inspect
Wall joints, drainage, abutments, visible cracks, levels and nearby services should all be reviewed.
Repair in the right order
Stop the loss pathway, stabilise the affected area, then reinstate paving, turf or landscaping.
Important: This guide is general information only. Waterfront structures and approval requirements must be assessed for the individual property.
When to arrange a site assessment
Arrange an inspection when visible conditions are changing, safety is uncertain, a purchase or sale is approaching, or you need a reliable project scope and budget.