Confirm the defect before repairing it
Recurring blockages or local ground movement can indicate a structural fault, but the repair choice should be based on evidence. A CCTV survey and the available access points help establish the location and extent of the problem.
Local repair or lining
Excavation may be appropriate where a pipe has collapsed, the layout must change or direct access is needed. Relining can be considered for suitable pipework where a liner can restore integrity without opening the full run.
The right method depends on pipe diameter, material, access, defect type and surrounding conditions. A survey is used to avoid presenting one technique as suitable for every drain.
Repair planning for occupied sites
For homes, rental properties and operational buildings, the plan needs to consider access, temporary disruption and how the drainage will be returned to service.