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FEDURCO DRAINAGE

Problem guide

Tree Roots in Drains

A tree near the house and a drain that keeps playing up can make roots an obvious suspect. Roots can block drains — but symptoms alone do not confirm it.

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Mature tree beside a house with an open drain chamber in the lawn
Tree roots growing through a cracked pipe joint

Can tree roots block drains?

How roots get into drainage systems

Yes, they can. Roots are drawn to moisture, and drains carry water and nutrients. Where a pipe has a weakness — a crack, an open or displaced joint, or a poorly sealed connection — fine roots can find their way in.

Once inside, they grow, collect debris and can gradually restrict or block the pipe. Over time they can also widen the defect they came through.

Roots generally take advantage of an existing defect rather than breaking through sound, intact pipework — which is why root ingress is often a sign the pipe itself needs attention too.

Recognise the problem

Signs that may justify investigation

None of these proves root ingress on its own — but together with a nearby tree, they are worth looking into.

  1. 01

    Repeated blockages

    The same drain blocking again weeks or months after clearing.

  2. 02

    Slow drainage that keeps returning

    Flow improves after clearing, then gradually slows again.

  3. 03

    Gurgling

    Air displaced past a restriction in the pipe.

  4. 04

    Trees or large shrubs close to the drain run

    Especially with older clay pipework, which has more joints.

  5. 05

    Root material seen in a chamber

    Fine roots visible when an inspection cover is lifted.

Drain camera being fed into an inspection chamber

Confirming root ingress

See it before treating it

The reliable way to confirm roots is to look. A CCTV survey shows whether roots are present, how far they extend, and — importantly — the condition of the pipe where they got in.

That matters because removing the roots without addressing the defect often means they come back.

CCTV Drain Surveys

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If roots are found

Common questions

Tree root questions

Not necessarily. Roots usually enter through a defect in the pipe, so sealing or repairing that defect is often the more effective answer. Whether a tree needs attention depends on what the inspection shows.

Roots generally exploit existing weaknesses — cracks, open joints or poor connections — rather than penetrating sound, intact pipework.

It restores flow, but if the defect that let them in is still there, roots are likely to grow back. That is why the pipe condition matters as much as the roots themselves.

From symptoms alone, we do not. Recurring blockages can have several causes. A CCTV survey is how root ingress is confirmed — or ruled out.

Often, where the pipe condition is suitable. Relining seals the joints and cracks roots use to get in. Where the pipe is too badly damaged, a section may need repairing or replacing instead.

That can depend on the circumstances. We can show you what the inspection found and where, which is a useful starting point for that conversation.

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