drains@dalrod.co.uk 0845 22 37 112

DALROD UK are continuously asked- What is drain relining? Do my drains need relining? Can my drain be relined rather than dug up and replaced?

Drain relining is a cost-effective and non-destructive method, used to repair a damaged drain. It involves moulding resin to the inside of the pipe resulting in adding a protective layer to the pipe to repair cracks and other damage; essentially creating a pipe within a pipe.

It is the perfect solution for problems with root ingestion, pitch fibre, fractured pipes, and displaced joints. The method is preferred to traditional pipe replacement, which is often expensive, disruptive and time-consuming. This is because, unlike the traditional method, drain relining does not require digging up the pipes to replace them and therefore doesn’t cause a messy disruption to your home or business (this is referred to within the industry as a No-Dig technique).


As a result, the process tends to take less time and comes with lower costs. The method is also just as, if not more effective than the traditional, as the lining is likely to last years without further adjustment or replacement.


  • No-dig solution: no messy excavation of surfaces
  • Quicker and cheaper than traditional pipe replacement
  • Prevents tree root infestation
  • Increases water flow rates
  • Lining likely to last years without further attention
  • Can be utilised in all types of pipes
  • Usually done within a day
  • All renovation and reline works are covered by our 10-25-year guarantee- dependent on the type of lining

The Process

Before the relining process, we will carry out a CCTV survey to inspect the location and the extent of the damaged area/s. Once this has been carried out, the damage can then be repaired by patching or relining the affected areas. We provide two types of relining: hot cure or ambient cure, depending on the situation.

  • The pipework is cleaned out using a high-pressure water jet.
  • A CCTV camera is sent through to mark the exact locations of any adjoining pipes.
  • The liner is then marked and measured to the correct length, before being filled with resin.
  • Once the resin has filled up the entire length of the liner, the liner is placed through the pipe. The liner airbag is then inflated to shape the internal walls and left inflated until the liner is cured.

This takes approximately 1 hour to harden using ambient curing. Once cured, the airbag is deflated and pulled back out of the pipe, leaving a new pipe in place.

To finish off, the camera is run through for a third time to make sure the marked areas have been laterally cut completely. A copy of the video can be supplied if required.

So, if your drainage system develops cracks or damage, don’t worry this doesn’t always mean your property will need to be dug up and cause unnecessary costs and damage. For more information see our drain relining page at https://www.dalrod.co.uk/sewer-renovation/

Prevention is key to all drainage needs, so talk to DALROD today about our PPM agreements on 0845 22 37 112.