Drain collapse emergency

A drain collapse emergency is an urgent response to a collapsed underground drain causing flooding, sinkhole formation in gardens or driveways, or total loss of drainage. Common causes include corroded cast iron, broken Victorian clay pipes from ground movement, deformed plastic pipes from over-excavation, and tree root damage. Across North London, drain collapses are most common in Camden, Islington and Hackney where Victorian clay drainage remains widespread. Before the engineer arrives, occupants should keep clear of any sinkhole, stop water-using activities, and document the issue with photographs. The service includes CCTV assessment to locate and characterise the collapse, temporary bypass where possible, and arrangement of excavation or no-dig repair (drain relining or patch lining). Buildings insurance may cover drain collapse under 'drainage' cover or 'accidental damage'; loss adjusters typically require CCTV evidence.