Drain relining is the most cost-effective way to repair a damaged drain that doesn't require complete replacement. A felt or fibreglass liner pre-impregnated with structural resin is inserted into the existing pipe via inspection chamber, inflated to the pipe wall, then cured (with hot water, steam, UV light or ambient cure depending on resin type) to form a fully structural new pipe inside the old one.
The result: a single seamless pipe with no joints, no infiltration paths for roots, smoother bore (improved flow), and a lifetime expectancy of 50+ years. Cost is typically 40–70% less than open-cut excavation, with no garden, driveway or floor disruption. We use iLINE liners and Brawoliner systems with UV and ambient cure capability.
Where this service applies
- Cracked or fractured clay drains (Victorian/Edwardian London)
- Joint defects allowing tree-root ingress
- Bellies / low spots in drainage runs
- Drains under driveways, paving or buildings (excavation cost-prohibitive)
- Conservation areas where excavation is restricted
- Insurance-claim subsidence repairs
- Pre-Build-Over Agreement remedial work
- Sectional patch repairs for localised defects
How we deliver
No surprises, no upselling. The exact path every job follows.
- 1
Pre-survey CCTV
Detailed CCTV to confirm scope, condition and feasibility. - 2
Drain preparation
High-pressure jetting to remove debris, scale and root material. - 3
Liner sizing & preparation
Liner cut to length, resin-impregnated under controlled conditions. - 4
Liner inversion or pull-in
Inserted via inspection chamber. Inverted under air pressure or pulled into position. - 5
Cure phase
UV light train, steam injection or ambient cure depending on resin. - 6
Robot cutter for connections
Where lateral connections enter the relined section, robot cutter restores them. - 7
Post-cure CCTV verification
Recorded footage confirms successful relining. - 8
Written report & warranty
50-year structural warranty issued.