- Internal blistering, caused by deterioration can cause blockages and eventually close up the entire pipeline.
- Pitch fibre is prone to deterioration caused by age, chemical erosion, weight stress and being poorly laid.
- Over time, pitch fibre becomes porous, washing away subsoil and causing subsidence. This also attracts shrub and tree roots, causing further damage.
- The delicate nature of pitch fibre means that the usual methods of drain clearance, e.g. high pressure jetting, can cause further structural damage.
We have been carrying out repairs to damaged pitch fibre for a number of years and have perfected our ‘no dig’ repair solution, which involves reshaping the deformed pipe. We deal with the problem by winching a ‘re-rounding cone’ through the damaged area. This restores the drain to its optimum shape. All of this can be done quickly and efficiently without the need for disruptive excavation. After the procedure has been carried out, the pipe is cleaned and checked with our CCTV camera and once we are happy with the re-profiling, a Cured-In-Place Pipe (CIPP), structural liner is installed to hold the pipe’s shape, stopping any future deformation of the pipe.