Yes. Tree roots can block sewer and drain lines. Fine roots usually enter through an existing crack, leaking joint or displaced pipe section, then grow and trap toilet paper and waste. A plumber can clear the roots, but the damaged entry point may also need relining, repair or replacement to prevent recurrence.
Signs of root intrusion
Recurring problems across several fixtures suggest a main sewer-line blockage rather than a local fixture blockage, although only an inspection can confirm the cause. Other underlying faults can also explain why a drain keeps blocking.
Warning signs include:
- several fixtures draining slowly
- toilets or drains gurgling
- toilet water levels rising or falling unexpectedly
- foul drain odours
- sewage backing up at a low fixture or overflow point
- blockages returning after previous clearing
- damp, sunken or unusually green ground above the pipe route, which may indicate a leak but does not confirm roots
If sewage is backing up, stop using connected toilets, taps, showers and appliances. Avoid contact with wastewater, keep children and pets away, and do not open sewer access points. Arrange urgent professional help.
How plumbers confirm and remove roots
A plumber typically clears enough of the obstruction to inspect the line, removes the roots and then checks the pipe for damage.
- Inspect the line: A CCTV drain inspection can locate root entry and identify cracked, displaced, deformed or collapsed sections. Understanding what a CCTV drain inspection involves helps explain why partial clearing may be needed before the camera can pass.
- Remove the roots: Depending on the pipe’s material and condition, the plumber may use mechanical root cutting or suitable high-pressure water jetting. Incorrect equipment or pressure can worsen a vulnerable pipe.
- Reinspect the pipe: A post-clearance CCTV inspection checks that flow has been restored and reveals the defect that allowed roots to enter.
- Repair the entry point: Clearing restores flow but does not seal cracks or open joints. Pipe relining may suit a structurally sound, properly prepared section. Severely displaced, deformed or collapsed pipes may require excavation, sectional repair or replacement.
How are repeat blockages prevented?
Prevention means repairing the crack, joint or damaged section that gave roots access, then monitoring the line if the plumber recommends it. Do not cut external roots without assessing whether tree roots near a drain can be safely removed; an arborist may need to consider tree stability and health.
Chemical root treatments do not repair damaged pipes and are not a substitute for professional clearing of an established blockage. Do not mix drain chemicals or add them to a backed-up line. Tell the plumber what products have already been used.
Do not use root cutters or high-pressure jetting equipment yourself. Contact our licensed blocked drain plumbers to inspect recurring blockages or urgent sewage backups and recommend the appropriate repair.