Collapsed drain repair restores a pipe that has lost a usable passage. We locate the failure and inspect as much of the surrounding run as access allows before deciding the repair. Broken material, soil in the bore or sinking ground can indicate collapse, although ordinary blockages can cause similar symptoms.
Collapsed Drain Repair
Collapsed drain repair using investigation and local replacement where the pipe has lost a usable bore.
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Locating the collapse
A camera may stop at the failure, so another access point can be needed to establish the damaged length.
Pipe and ground condition
Collapse can affect the surrounding ground as well as the drain, particularly where soil has entered the pipe.
Locating the collapsed section
A camera may reach the broken pipe and then stop before showing the full extent of the failure. Inspection from another access point can help establish what lies beyond it. A fully collapsed bore cannot normally accept a liner, so local replacement is usually needed to restore the pipe.
Discuss a collapsed drain repair
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Excavation and pipe replacement
Nearby buried services, ground conditions and trench support need consideration before excavation. The replacement section connects to suitable pipe beyond the failure, with levels and support checked before reinstatement. Before excavation starts, the expected opening and reinstatement area are identified.
Ground condition around a collapse
Soil entering a damaged drain can leave voids above or beside it. Sinking paving or unstable ground should remain clear of vehicles until assessed. Repairing the pipe does not by itself make unstable ground safe; any ground movement needs its own assessment. Suitable defects further along the run may still be repaired with a patch or liner.
Collapsed Drain Repair: common questions
Can a completely collapsed pipe be relined?
The route usually has to be restored by local replacement before a liner can pass through it.
Should vehicles use the surface above the failure?
Keep vehicles clear of sinking paving or suspected unstable ground until it has been assessed.
Does a blockage prove the pipe has collapsed?
No. Roots, accumulated deposits and foreign objects can obstruct a pipe that remains structurally intact.
Can lining follow a local replacement?
Yes. It may repair adjoining defects once the collapsed section has been replaced and the remaining pipe checked.
How is the repair length decided?
Inspection identifies the failure and where connections can be made to sound pipe. A camera blocked by the collapse may require another access point to establish the full length.