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LDF install structural lining material to re-instate structural integrity when pipework becomes broken or misaligned.

Our main drain lining and patch repair services include:

  • Structural Lining
  • Localised Patch Repairs
  • Water Mains Repairs

Lining Material and Process

Within pipe diameters up to 600mm, we commonly use Polyester resin based felt liners. Runs of up to 80m in length can be lined for 100 and 150mm diameter pipework, 50m runs for 225, 300mm diameters and 30m long runs for the larger diameters. This liner is temperature sensitive and more suited for use in straight sections. The liner is placed in the host pipe impregnated with resin. An Air Inversion Chamber is then used to inflate the line hose into position; it’s then left to cure. This system is suitable in most sewer refurbishment situations with wall thickness from 2mm to 9mm for structural applications. Robotic lateral cutters are used to open blind connections where applicable.

In the event a defective host pipe deviates, we use an Epoxy Flexi liner which is more suited to the job. The use of a woven polypropylene sock slightly elasticised is impregnated with epoxy resin is blown by air down the pipe under approx. 1 bar of pressure. The liner traverses round bends following the precise contours of the host pipe. Once in position, the resin sets, bonding the liner to the pipe walls. Fractures and open joints are sealed increasing pipe strength and eliminating the chances of smells from leaving cracked pipes and stopping water egress into the surrounding ground.

Have an emergency? Or looking for a maintenance or quote? Call us today on 0800 612 2179



Whether your planning a regional programme of work, or require urgent help with an unexpected issue, you need a partner who can respond quickly and efficiently.






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In any lining application, the cross section of the repaired pipe will be slightly reduced. However, what’s lost in diameter is gained in flow rate, as all joints, gaps and cracks are eliminated and the new liner has become one continuous length of drain, thus increasing flow pattern. Applications of each type of installation can sometimes be restricted, and normally a free-of-charge site meeting will be required with an LDF Surveyor.