services details

Highway Drainage Remedials

Following the undertaking of detailed drainage surveys Crown Plus have the inhouse capability, resource and experience to efficiently and economically undertake any remedial works required to bring the drainage system back into a serviceable condition. We have the detailed knowledge and experience to undertake the most complex of schemes on pipe diameters ranging from 100mm to 1800mm.

Our expertise covers a range of rehabilitation techniques such as jetting & cleaning, root cutting, concrete removal & CIPP (Cured in Place Pipe) repairs.

These ‘no-dig’ pipe replacement methods involve inserting a liner impregnated with a special resin into a surface water pipe. Once inside, the liner is turned inside out and forced through using either water or air pressure; the liner is pushed out to bond with the interior of the pipe and the resin is cured or hardened. This creates a new pipe within the old pipe, restoring the integrity of the pipe.

Once the CIPP liner has been installed, any lateral (branch) connections mapped prior to the lining being fitted, are opened using advanced robotic cutters.

For localised repairs or short sections of drain, we instal CIPP patch liners. This involves positioning a short length of liner (typically 1000mm) which is wrapped around an inflatable packer. Once in place, the packer is inflated leaving the patch to form a new lining to that section of pipe. Several patches may be fitted end to end to make a longer repair.

Full CIPP relining and patch repairs are equally effective for creating long lasting solutions with minimal disruption.