If your drains have been damaged over the years by ground movement or, as often happens, by the roots of trees, it is often possible to reline the pipe rather than having to dig it up and start from scratch.

Relining is often the solution also for dealing with problems caused by pitch fibre drains, an outdated system that has left numerous problems such as the bulging or collapse of the pipe.
Relining will nearly always be a cheaper option, where it is practicable, than excavating and relaying a system.

Once any debris has been cleared by jetting or root cutting equipment the relining can be done.
A liner is soaked in resin and inserted into the pipe. An inversion vessel then inflates the liner and holds it in place until it is set.