Blocked Drains Caused by Tree Roots: Adelaide Plumber Solutions

You have had the drain cleared three times this year. Each time, the plumber pulls out a mass of tree roots, the drain flows perfectly for a few months, and then the problems start again. Slow drainage. Gurgling sounds. That sewage smell is creeping back. The roots keep coming back because nobody has fixed the actual problem.

Tree root blockages are the most common drain problem Adelaide plumbers deal with. The city’s leafy suburbs are full of established trees, and those trees are constantly searching for water. Your sewer and stormwater pipes are like an all-you-can-eat buffet for tree roots. Moisture, nutrients and easy access through old pipe joints make underground pipes irresistible.

Clearing the roots is only half the job. The real solution is stopping them from coming back. This guide explains how roots get into your pipes, how Adelaide plumbers remove them, and what we do to prevent regrowth so you are not paying for the same drain repair over and over again.

Why Adelaide Has Such a Big Tree Root Problem

Adelaide is one of the most tree-filled capital cities in Australia. That is great for shade, property values and the environment. But it creates a perfect storm for drain blockages.

Established Trees in Leafy Suburbs

Suburbs like Burnside, Unley, Norwood, Mitcham, Toorak Gardens, Kensington and Walkerville are famous for their tree-lined streets and mature gardens. Many of these trees are 50 to 100 years old with root systems that extend 10 to 20 metres from the trunk. Your drain pipes run right through that root zone.

Old Clay Pipes With Vulnerable Joints

Most Adelaide homes built before the 1980s have clay or earthenware sewer pipes. These pipes were installed in short sections joined together with cement mortar. Over 40 to 70 years, those joints deteriorate. Small cracks and gaps develop, and that is all tree roots need to find their way in.

Modern PVC pipes have far fewer joints and are much more resistant to root intrusion. But most established Adelaide suburbs still have the original clay pipes underground.

The Worst Offenders: Trees That Love Your Pipes

Some tree species are worse than others when it comes to invading drains. In Adelaide, the biggest culprits are:

• Eucalyptus and gum trees –  Their roots spread widely and aggressively seek water. Very common throughout Adelaide suburbs.
• Fig trees (including Moreton Bay figs) – Extremely aggressive root systems. One of the worst for drain damage.
• Willows – Notorious water seekers. Often planted near creeks, but their roots travel far.
• Liquid ambers – Popular street trees in Adelaide. Their roots cause significant pipe damage.
• Poplars and elms – Fast-growing with extensive root systems that seek out any moisture source.

Even smaller trees and large shrubs can cause problems if they are planted close to drain lines. We regularly find root blockages from bottlebrush, oleander and photinia hedges that homeowners never suspected.

How Tree Roots Get Into Your Pipes

Tree roots do not punch through solid pipe walls. They find existing weaknesses and exploit them. Here is how it happens.

• Roots detect moisture escaping from pipes – Even tiny amounts of moisture vapour escaping from a hairline crack or deteriorating joint will attract roots from metres away. The roots grow toward the moisture source.
• They enter through cracks and joints – Once the root tip reaches the pipe, it finds its way through any gap. A crack a few millimetres wide is enough. The root squeezes through and enters the pipe.
• Inside the pipe, they grow rapidly – The inside of a sewer pipe is paradise for roots. Constant moisture, nutrients from waste, and a protected environment. Roots that enter as thin tendrils can grow into thick masses within months.
• The root mass traps waste and causes blockages – As roots fill the pipe, they catch toilet paper, grease and other waste. The blockage builds until the drain stops flowing completely or backs up into the house.

Signs Your Drain Has Tree Root Damage

These warning signs suggest roots may be growing in your pipes:

• Recurring blockages – The drain blocks get cleared, and the blocks again appear within weeks or months. This repeat pattern is classic root intrusion.
• Slow drainage throughout the house – When multiple fixtures drain slowly, it usually means the main sewer line is partially blocked rather than individual drains.
• Gurgling sounds. Air trapped by a partial blockage causes gurgling from drains when water tries to flow past.
• Sewage smells – Roots breaking into the pipe can let sewer gases escape into the surrounding soil, which you may smell in your yard or even inside.
• Wet patches or extra green grass – A cracked pipe leaking underground will create lush growth directly above it. If one patch of lawn is always greener than the rest, there may be a leaking pipe below.

Tree Roots Blocking Your Drain Again?

We clear the roots and fix the pipe so they cannot come back. CCTV inspection, high-pressure root cutting, and pipe relining to seal the entry points permanently.

Call 0484 600 095 for Same-Day Root Clearing

How Adelaide Plumbers Clear Tree Root Blockages

Clearing roots properly requires more than a basic drain snake. Here is the process we follow.

Step 1: CCTV Camera Inspection

Before we start cutting, we need to see what we are dealing with. A camera goes down the drain to show us exactly where the roots are, how severe the blockage is, and what condition the pipe is in. This footage tells us whether the pipe can be saved or needs more serious repair.

Step 2: Mechanical Root Cutting

For heavy root masses, we use mechanical cutting equipment. A rotating cutting head goes down the pipe and physically cuts through the roots, breaking them up so they can be flushed away. This is the most effective method for thick, established root balls that have been growing for years.

Step 3: High-Pressure Water Jetting

After cutting, we blast the pipe with high-pressure water to flush out all the cut roots, debris and buildup. The hydro jetting also cleans the pipe walls, removing grease and scale that roots would otherwise cling to. A clean pipe is much less attractive to new root growth.

Step 4: Final Camera Check

We run the camera through again to confirm the pipe is completely clear and to assess the damage. This is when we can see how badly the roots have affected the pipe. If the pipe has cracks, separated joints or other damage, we discuss the options for permanent repair.

How to Stop Tree Roots From Coming Back

Clearing roots without fixing the entry point is like mopping up water without turning off the tap. The roots will return within months. Here is how we prevent regrowth.

Pipe Relining: The Permanent Solution

Pipe relining is the most effective way to stop roots permanently. We insert a flexible liner coated with resin into your existing pipe. The liner is inflated against the pipe walls and cured to form a new, seamless pipe inside the old one.

The relined pipe has no joints or gaps for roots to enter. It is completely sealed from end to end. Roots cannot penetrate the cured epoxy material. A quality reline comes with a 35 to 50 year warranty and effectively makes your old clay pipe as good as new PVC.

The best part is that relining is trenchless. We do not need to dig up your yard, driveway or garden. The work is done through existing access points.

Pipe Patching for Localised Damage

If the root entry point is limited to one or two spots, we can patch just those sections rather than relining the entire pipe. This is cheaper than full relining and still seals the entry points permanently.

Regular Maintenance for Unlined Pipes

If relining is not in the budget right now, regular maintenance can keep roots under control. Having the drain cleared and jetted every 12 to 18 months prevents roots from building up into major blockages. It is not a permanent fix, but it is much cheaper than emergency callouts when the drain blocks completely.

What Does It Cost to Fix Tree Root Blockages in Adelaide?

Costs vary depending on how severe the blockage is and what solution is needed.

• Root clearing with jetting: $280 to $450, depending on blockage severity and access.
• CCTV inspection: $150 to $250. Often included with clearing work.
• Pipe relining: $3,500 to $8,00,0, depending on pipe length and diameter. This is a permanent solution with decades of warranty.
• Pipe patching: $800 to $1,500 per patch for localised repairs.
• Annual maintenance clearing: $200 to $350 per visit to keep roots under control between permanent repairs.

We always provide an upfront quote after the camera inspection, so you know exactly what the repair will cost before any work begins.

Tired of Paying to Clear the Same Roots?

Pipe relining stops roots permanently. One repair, decades of protection. We will show you the camera footage, explain your options, and give you an upfront price.

Call 0484 600 095 for a Pipe Relining Quote

Frequently Asked Questions

• How do I know if tree roots are blocking my drain?

The classic sign is recurring blockages. If your drain blocks, gets cleared, and blocks again within a few months, roots are almost certainly the cause. Other signs include slow drainage throughout the house, gurgling sounds, and sewage smells. A CCTV camera inspection will confirm whether roots are present.

• Will chemical drain cleaners kill tree roots?

No. Supermarket drain cleaners are designed to dissolve grease and hair, not tree roots. There are copper sulphate-based products that can slow root growth, but they will not clear an existing blockage or fix the damaged pipe. Professional mechanical cutting and jetting are needed to properly clear roots.

• Can roots damage pipes that are not already cracked?

Roots typically enter through existing weaknesses like cracks, loose joints or deteriorating seals. However, once inside, growing roots can expand and crack the pipe further. A small entry point can cause major damage over time as roots grow thicker inside the pipe.

• How often do I need to clear roots if I do not get the pipe relined?

It depends on how aggressive the tree is and how damaged the pipe is. Some pipes need clearing every 6 months. Others can go 18 months to 2 years between clears. After we inspect your pipe, we can give you an estimate of how often maintenance will be needed.

• Should I remove the tree causing the problem?

Removing the tree will eventually stop new root growth into the pipe, but it can take years for existing roots to die off. The damaged pipe still needs repair regardless. Many Adelaide trees are also protected by council regulations, so removal may not be allowed. Relining the pipe is usually a better solution than removing a mature tree.

• Can pipe relining be done if the pipe is full of roots?

Yes. We clear the roots completely first, then reline the clean pipe. The relining process requires a clear, clean pipe to work properly. The combined clearing and relining process can usually be completed in one day.

• Is pipe relining worth the cost?

If you are paying for root clearing every year, relining pays for itself within a few years and then saves you money for decades. It also prevents the pipe damage from getting worse, which could eventually require excavation and full replacement at a much higher cost. For most Adelaide homeowners with root problems, relining is the most cost-effective long-term solution.

• How long does pipe relining last?

Quality pipe relining systems come with warranties of 35 to 50 years. The epoxy materials are designed to last as long as a new PVC pipe. In practical terms, a relined pipe should last the lifetime of your home.

Break the Cycle of Repeat Root Blockages

Tree roots in your drains are not a problem that goes away on its own. As long as there are cracks or gaps in your pipes, roots will keep finding their way in. Clearing them without fixing the entry points just means you will be paying for the same repair again in a few months.

Pipe relining breaks that cycle permanently. It seals your pipes from the inside, eliminates the entry points, and protects your drains from root intrusion for decades. One repair instead of endless maintenance.

If you are dealing with recurring root blockages, the first step is a proper CCTV inspection to see exactly what is happening in your pipes. From there, we can recommend the most cost-effective solution for your situation.

Wills Plumbing Adelaide clears tree roots and provides permanent solutions to stop them from coming back. We service all Adelaide suburbs with same-day availability for urgent blockages. Call 0484 600 095 to book a drain inspection and find out what is really going on in your pipes.