CCTV shows the accessible inside of the pipe. It does not automatically reveal ground conditions outside it or explain all movement. Where the evidence is incomplete, agree what further investigation is needed before selecting a repair.
The pipe often needs cleaning and suitable obstructions removed first. Ask how the contractor will check that it is ready for the chosen lining method.
Understand the practical limits
Lining follows the existing route. It will not put a poorly laid pipe at the correct fall or send drainage somewhere new. A collapse, severe distortion or inaccessible obstruction can need another repair or preparatory digging.
Check that the remaining internal diameter suits the drainage duty. Ask how branch connections will be found, dealt with and checked, so water entering from other runs is not blocked by the lining.
Different systems are installed and cured differently. See Renoline's explanation of UV lining as one example. Its general capabilities do not prove suitability for your pipe; the recommendation must follow your survey and repair specification.
Compare lining with excavation
Relining is worth assessing where digging would disturb a used floor, busy yard or established garden areas. Include preparation, access, temporary limits on use, branch work and final inspection in the comparison.
Digging gives direct access to replace a failed section and alter its position when necessary. Depth, nearby services, structures, traffic and making good affect cost and disruption. Sometimes a local excavation and lining elsewhere make a sensible combined job.
Ask why the chosen method will fix the observed problem. Comparing only the length treated misses differences in what the work will achieve.
Agree evidence and handover before work starts
Ask the quote to identify:
- Exactly which section and damage will be treated.
- Necessary cleaning and preparatory repairs.
- The lining method and how connections are kept usable.
- Limits on drainage use and arrangements for affected people.
- Final inspection and the records you will receive.
- Unrepaired defects or drainage runs left outside the job.
Keep the original survey and completed-work records together. They are useful when later work affects a drain beneath shared space or an area that is difficult to reach.
Frequently asked questions
Can every cracked drain be relined?
No. The damage, pipe shape, access and suitability of the existing pipe determine the options. A visible crack does not automatically make lining the right answer.
Does relining remove the need for any excavation?
No. Some jobs still need digging for access or to repair an unsuitable section first. Check that the quote explains this.
Does a lined drain still need maintenance?
Yes. The agreed defect is repaired, but unsuitable waste can still enter. Keep up appropriate maintenance and avoid putting grease, wipes or other obstructing materials into the system.
Related guidance and services
Read how CCTV drain surveys work and why drains block repeatedly. Find drain repair and lining, replacement drainage and survey support.
Browse property services, maintenance, projects, sectors served, locations and the Knowledge Centre, or ask about a drain repair.
