Tree roots in drains: confirm the problem before repair

The RHS explains that roots can exploit water leaking from unsound drains. Older pipes with poor seals or rigid joints can be vulnerable. Watertight drains are generally much less of a problem.

That distinction matters when a repair is proposed: removing roots and dealing with the route into the pipe are not necessarily the same job. Ask the contractor to explain both parts of the proposal.

Sources: RHS.

Request a record of what the contractor actually sees and where it was found. If a blockage prevents a complete inspection, ask how much remains unchecked and what further work is proposed.

A camera report is not an assessment of a tree's health or proof that a particular tree owner is liable. Wolverhampton Council, for example, says it will not accept roots near a drain as proof of root-related damage.

• Footage or photographs of any roots seen inside the drain.
• The affected pipe run and the location of the finding.
• Any visible defect or entry point that can be identified.
• Sections the camera did not reach and why.
• The further checks needed before choosing a repair.

Sources: Wolverhampton Council.

Ask whether the quote is for removing an obstruction, repairing a damaged section or both. The RHS describes repairing or lining leaky drains as alternatives to removing a tree. Which option is suitable depends on the inspected pipe, not a general online recommendation.

If roots are cleared, ask what evidence you will receive afterwards and whether another inspection is needed to see the underlying pipe. Get an itemised quotation for any recommended lining or replacement.

Sources: RHS.

If the pipe is shared or may be part of the public sewer, ask the sewerage company who should investigate. CCW's guidance applies to England and Wales; check the relevant provider for Scotland or Northern Ireland.

If you intend to make an insurance claim, speak to your insurer about the evidence and authorisation it requires before non-urgent repairs. The existence of roots or a defect does not itself establish insurance cover.

Sources: CCW; Wolverhampton Council.

The RHS advises that removing trees should be a last resort in this context. It also warns that cutting substantial roots close to a tree can harm or destabilise it. Get appropriate advice before tree work rather than treating removal as a guaranteed drainage fix.

Do not pour chemicals into a drain on the basis of this guide. Ask the drainage contractor to explain a suitable method for the inspected pipe, and involve a qualified tree professional if tree work is proposed.

Sources: RHS.

• Can you show me the roots inside the pipe and locate the finding?
• Was the whole relevant pipe inspected? If not, what remains unknown?
• Is the quote for clearance, a pipe repair or both?
• Why is the proposed repair suitable for this particular defect?
• What footage or report will I receive before and after the work?
• Does the total include VAT, inspection, clearance and any reinstatement?

Find and check a drainage contractor when you are ready to ask for quotes.