Freephone 0800 328 2801 Fax:  01766 771 316

Drain Patch / re-lining

   

With time, drains can crack due to ground movement and subsidence, can become damaged by root infiltration and may eventually lead to a total collapse.  This can lead to repeated blockages and could even cause an environmental incident. Our CCTV engineers can not only diagnose these problems but can also suggest the most appropriate remedial action.  Depending on the extent and nature of the problem our engineers can suggest a number of different methods of drain repairs that may not necessarily lead to excavating the drain. Our range of no dig technologies can be particularly effective in situations such as drain problems occurring under properties or conservatories where excavation would be expensive and very disruptive. With localised non structural defect drains or small cracks or holes in pipes; patch lining can be a useful solution. This technique involves placing, with the aid of CCTV, a resin coated fibre glass mat over the exact location of the defect. When positioned an elongated inflatable bladder is used to fix the patch in place. The bladder pressure is maintained until the resin is cured and then the inflatable device is simply deflated and extracted. The integrity of the repair is then checked with a post installation CCTV survey.  Isolated defects are increasingly being repaired using this cost effective method which can in some circumstances be completed from start to finish within a couple of hours. Some times however the damage is more extensive involving whole sections of drain. In these circumstances a drain relining service running from manhole to manhole can be performed. Again this technique will invariably be much cheaper, less disruptive and much less time consuming to perform than excavation. The liner is impregnated with resin and inserted into the drain. The liner is then inverted using air pressure and left to cure. This technique is effective for clay, plastic and pitch fibre of all sizes from 75mm upwards, and leaves the pipes in an "as new" condition. Depending on the ambient temperature, the drains can usually be fully functional within 24 hours. Sometimes during the structural re-lining process, incoming connections are lined over. In these situations, we will use state of the art robotic lateral cutters to cut the liner, opening up the closed connection. These diamond headed tools are used in conjunction with the cctv equipment to ensure the accuracy of the cut. When pitch fibre pipes become deformed, we can also carry out a re-shaping service. Once the re-shaping has been completed, the line can then re-lining can be carried out. All work is to high specification and fully guaranteed.