How do you confirm a collapsed drain?

A CCTV survey shows the bore obstructed or missing, camera can't pass, or severe deformation/step. Jetting first may be needed for visibility.

Can lining fix a collapsed drain?

No—if the pipe has lost shape or the bore has closed. Local excavation to rebuild levels is usually required; then lining the remaining run may add protection.

Collapsed Drain Repairs – Options & Next Steps

Evidence-led repairs based on CCTV: when to dig, when lining helps, costs, and what to document for insurers.

Need triage? Ask DrainageGPT to summarise your survey findings and suggest a path.

What a collapse looks like

Camera cannot pass; bore closed
Severe displacement/ovality
Frequent backups and surface breakout

Immediate steps

Minimise water use to prevent backups
Survey and trace the run to locate the defect
Mark utilities before any digging

Repair options

Excavate & replace: rebuild line/level with new pipe and bedding
Hybrid: dig the worst section, then line the rest
Chambers: add/upgrade for future maintenance

Costs & documentation

Cost drivers: depth, access, reinstatement (paving/tarmac), groundwater
Keep: pre/post CCTV, photos of bedding/backfill, diagrams, invoices
Insurance: clear evidence helps discussions

Related: Excavation & Drain Repairs