Can Tree Roots Damage Drains?

Graeme Blakey - 16th April 2026

Tree roots are one of the most common causes of underground drain damage throughout the UK, especially in older properties with ageing clay pipe systems. While trees add beauty and value to gardens and landscapes, their root systems naturally seek moisture and nutrients underground. Unfortunately, drains and sewer pipes provide an ideal environment for roots to grow towards.

At DGS Limited, we regularly attend drainage call outs across the North East where recurring blockages, slow drainage, flooding, or collapsed pipes are ultimately traced back to root intrusion.

Tree root damage often starts as a small issue but can quickly develop into serious structural drainage problems if ignored.

Whether you are dealing with drainage problems in Durham, Sunderland, Newcastle, or Middlesbrough, understanding how roots affect drains can help prevent expensive repairs.

How Do Tree Roots Damage Drains?

Tree roots do not usually smash through healthy pipes immediately. Instead, they exploit existing weaknesses within drainage systems.

Older drains often contain:

• Small cracks
• Loose joints
• Deteriorating seals
• Displaced pipe sections
• Age-related wear

Roots naturally grow towards moisture, and even the smallest leak from a drain can attract them.

Once roots enter the pipe, they continue expanding inside the drainage system. Over time, they trap toilet paper, wipes, grease, and debris, eventually causing severe blockages and structural damage.

Why Older Drainage Systems Are More Vulnerable

Many older homes across the North East still use clay drainage pipes. While clay pipes were widely installed for decades, they are far more vulnerable to root intrusion compared to modern plastic systems.

Older Clay Drains Often Suffer From:

• Joint movement over time
• Cracking caused by ground movement
• Pipe displacement
• Natural ageing deterioration
• Weakened mortar joints

Modern uPVC drainage systems are generally more resistant, but even newer drains can still suffer damage if poorly installed or affected by subsidence.

Signs Tree Roots May Be Blocking Your Drains

Tree root intrusion often develops gradually. Many homeowners initially notice small drainage problems before major blockages occur.

Common Warning Signs Include:

• Recurring blocked drains
• Slow-draining sinks, toilets, or showers
• Bad smells from drains
• Gurgling sounds in pipework
• Water backing up internally
• Overflowing external drains
• Flooding in gardens
• Sunken areas near drainage runs
• Repeated need for drain unblocking

If the same blockage keeps returning, roots are often a likely cause.

You can also read our related guide: Why Do Drains Block Repeatedly?.

Can Tree Roots Completely Collapse a Drain?

Yes. In severe cases, root intrusion can eventually cause drains to crack, deform, or collapse entirely.

As roots continue growing, they place pressure on the pipe walls and joints. Over time, this can lead to:

• Pipe fractures
• Collapsed sections
• Severe blockages
• Ground movement
• Drain displacement
• Major excavation requirements

What starts as a minor root intrusion issue can eventually require full drain replacement if left unresolved.

What Types of Trees Cause Drain Problems?

Some tree species are significantly more aggressive than others when searching for moisture underground.

Common Problematic Trees Include:

• Willow trees
• Poplar trees
• Oak trees
• Sycamore trees
• Elm trees
• Ash trees
• Large conifers

Fast-growing trees with extensive root systems are particularly problematic when located near older drainage systems.

How CCTV Drain Surveys Detect Root Intrusion

The most effective way to diagnose tree root damage is through a professional CCTV drain inspection.

Using specialist camera equipment, drainage engineers can inspect the inside of underground pipes in real time.

A CCTV Survey Can Identify:

• Root intrusion points
• Cracked pipework
• Collapsed drains
• Pipe displacement
• Grease and debris build-up
• Joint failures
• Water flow restrictions

Rather than guessing where the problem is located, CCTV technology allows accurate diagnosis with minimal disruption.

How Are Tree Roots Removed From Drains?

The repair method depends on the severity of the root intrusion and the condition of the drainage system.

Common Drain Repair Solutions Include:

Root Cutting

Specialist cutting tools remove roots from inside the drain pipe.

High-Pressure Drain Jetting

Powerful water jetting systems help clear debris and smaller root masses.

Drain Relining

Drain lining creates a new pipe within the damaged drain without excavation.

Excavation and Pipe Replacement

Severely collapsed drains may require excavation and replacement of damaged sections.

At DGS Limited, we always aim to minimise excavation wherever possible.

Can Tree Roots Return After Removal?

Unfortunately, yes. If the underlying pipe damage remains unresolved, roots often grow back into the drainage system.

This is why temporary clearing alone is rarely enough.

Long-Term Prevention Usually Requires:

• Repairing cracked drains
• Replacing damaged pipe sections
• Drain relining
• Regular maintenance inspections
• Root barrier installation in some cases

Can Root Damage Affect Property Value?

Yes. Significant drainage issues can affect property sales and valuations.

Homebuyers are increasingly arranging professional drain surveys before purchasing older homes because hidden drainage defects can be extremely expensive to repair.

Drainage issues linked to roots can also contribute to:

• Damp problems
• Subsidence concerns
• Garden flooding
• Insurance claims
• Structural concerns

How To Prevent Tree Roots Damaging Drains

1. Arrange Regular Drain Inspections

Routine CCTV inspections can identify early signs of root intrusion before major damage occurs.

2. Address Small Drain Problems Quickly

Small cracks or recurring blockages should never be ignored.

3. Be Careful Planting Trees Near Drains

Large trees should not be planted close to underground drainage runs.

4. Upgrade Older Drainage Systems

Replacing deteriorating clay pipes with modern pipework can significantly reduce risk.

5. Maintain Surface Drainage Properly

Keeping external drains clear helps reduce water pressure and drainage stress.

Drainage Problems Often Mistaken for Simple Blockages

Many homeowners repeatedly clear drains without realising roots are the true cause.

Temporary unblocking may improve flow briefly, but the blockage soon returns because the roots remain inside the system.

This is especially common in older areas around Darlington, Gateshead, Hartlepool, and Stockton.

Commercial Properties and Root Intrusion

Commercial drainage systems are equally vulnerable to root damage, especially around older buildings, industrial sites, schools, restaurants, and office premises.

Commercial drainage failures can lead to:

• Business disruption
• Health hazards
• Flooding
• Emergency closures
• Costly repair works

Preventative maintenance is often far cheaper than emergency excavation.

Why Choose DGS Limited?

DGS Limited provides professional drainage investigations, CCTV drain surveys, root removal, drain repairs, and excavation services across the North East.

Customers choose us because we offer:

• Rapid emergency response
• Advanced CCTV survey technology
• High-pressure jetting equipment
• Experienced drainage engineers
• Honest recommendations
• Domestic and commercial expertise
• Groundworks and excavation capability

We also provide professional groundworks services and septic tank installations across the region.

Frequently Asked Questions

Can tree roots really break drain pipes?

Yes. Roots exploit small cracks and joints in drainage systems and can eventually cause severe structural damage.

How do I know if roots are in my drains?

Recurring blockages, slow drainage, bad smells, and overflowing drains are common warning signs.

Can root damage be repaired without digging?

In some cases, yes. Drain relining can repair damaged sections without full excavation.

Will drain jetting remove tree roots?

Jetting can help remove smaller roots and debris, but larger root masses may require specialist cutting equipment.

Are older properties more vulnerable to root intrusion?

Yes. Older clay pipe systems are far more susceptible to cracks and root penetration.

Can removing the tree solve the problem?

Not always. Damaged drains usually still require repair work even if the tree is removed.

If you are experiencing recurring blockages, slow drains, or suspect tree roots may be damaging your drainage system, contact DGS Limited today for professional support and expert drainage investigations.