Tree roots in drains: signs to look for

How roots can become a drainage problem

Roots seek moisture and can exploit cracks, failed joints or other openings in underground pipework. Once inside, they can catch waste and debris, gradually restricting flow and contributing to repeated blockages.

Possible warning signs

There is no single surface symptom that proves roots are present. Recurring blockages in the same drainage run, slow flow that returns after clearance, or defects found during previous work can justify investigation.

Do not diagnose roots from symptoms alone

Other problems can produce similar symptoms, including scale, grease, displaced joints and damaged pipework. A CCTV drain survey can help establish whether root ingress is actually present and where it is located.

Clearance may not be the whole repair

Removing an obstruction can restore flow, but if roots entered through a structural defect the underlying opening may still need attention. The appropriate drain repair should be based on the condition and location of the defect.