Last Update: 28 October 2025
Tree roots pose a significant threat to your plumbing system, often going unnoticed until they cause major issues like blocked drains and burst pipes. Understanding why roots invade pipes and taking preventative measures is crucial for maintaining a healthy plumbing system and avoiding costly repairs.
This guide explores the signs of tree root intrusion, such as foul smells, decreased water pressure, strange pipe noises, and improper toilet flushing. It also provides actionable strategies to prevent root damage, including strategic gardening, pipe replacement or relining, and the installation of physical root barriers. Early detection and proactive measures are key to safeguarding your pipes from invasive tree roots.
Are you concerned that tree roots in your garden have infiltrated your pipelines? Our guide will help you prevent serious plumbing damage.
When you’re trying to clear a blocked drain , tree roots might not be the first culprit that comes to mind.
Tree roots can invade your sewer pipes, causing significant plumbing headaches if ignored. Clogged drains create pressure on your plumbing system, potentially leading to major issues like burst pipes .
To tackle this, understand why roots grow in pipes and how to prevent it . Once your plumbing is secure, there’s less need to worry about unpleasant plumbing surprises.
You can find all the information about root invasion in your pipes and sewer line here.
What Causes Tree Roots To Grow In Sewer Lines
Root systems have been known to penetrate sewer lines, causing hairline cracks and blockages. This usually occurs in tropical areas, where the heat causes the roots to grow deeper in search of water, and pipelines make for an excellent water source. The aggressive root growth results in the penetration of sewer pipes, damaging them.
Tree roots can infiltrate sewer pipes from the top, sides, or bottom, particularly in drier regions. However, even temperate areas with plenty of rain aren’t immune, as roots flourish in nutrient-rich settings.
Signs Of Tree Roots In Sewer Line
Usually, there are several warning signs that you have tree root growth in your sewer pipes . You can prevent severe plumbing problems and stop water bills from rising by being vigilant and acting quickly.
1. Foul Smell
Tree roots cause sewer blockages, leading to the deposition of foul-smelling waste. You may want to check your plumbing to detect a foul odour from your drains .
2. Decrease In Water Pressure
Blocked pipes can reduce water pressure , which can cause issues in the long run. This may be a tell-tale sign that the tree’s roots ravage your plumbing.
3. Strange Noises In Your Pipes
Damaged pipes can result in strange banging or whistling noises when you turn on taps because of air rushing into the pipes. While this isn’t strictly a sign of root growth in your pipes, it is a definitive sign of a damaged pipe. You may want to have your plumbing checked if this is the case.
4. Improper Toilet Flushing
After pulling on the flush lever, the water may not go down as freely as it usually would, indicating an obstruction in your pipeline. If the block doesn’t clear up with baking soda and vinegar , you may want to have the pipes checked for tree root growth.
How To Avoid Tree Roots In Pipes
To avoid costly repair bills, you can opt for the following strategies to keep the roots out of your pipes and prevent further root damage :
1. Strategic Gardening
If your garden is vacant and you’re considering populating it with more giant trees, consider studying the sewer system in your home’s vicinity.
Plant trees away from the main underground pipes , and be mindful of the distance you put between the potential tree’s root system and the drain pipe. The ideal gardening option would be planting trees with relatively low growth. Trees like banksia and acacia are slow-growing species with shorter roots.
2. Pipe Replacement Or Slip Line Insertion
You may already have trees in your backyard, or maybe you’ve moved into an old house with large trees with extensive root systems. In either case, you can’t always have a clear-cut choice, which would demand more involved solutions to the plumbing problem.
You can have your plumber insert a slip line that feeds into the plumbing to create a barrier against the invasive roots. Alternatively, you can replace the pipes if old enough to prevent tree roots from breaching.
3. Install Root Barriers
Physical barriers direct roots away from pipes. They come in several varieties, with differing effectiveness, namely solid and permeable barriers.
Solid barriers are made from corrosion-resistant materials like plastic or fibreglass, making them highly effective at warding off tree roots. However, there is no room for water to pass through the root barrier, which may exacerbate water-clogging issues.
Permeable barriers are made from a mesh that allows smaller roots and water to go through them. The main drawback with permeable barriers is the risk of choosing the wrong size, leading to the root system penetrating your pipe system.
How To Remove Tree Root Intrusion From Your Pipes
If you already have tree roots in the pipes, have your plumber utilise root growth inhibitors to dissolve smaller roots from the sewage system. Smaller roots are typically a tiny part of tree root systems, so if harm does come upon them, it won’t affect the tree’s growth much. Trees depend more on more extensive roots for nutrition.
A plumber typically uses a foaming chemical to dehydrate the roots and stop new growth in your pipes, offering a straightforward solution to what could become a significant issue. To fix the pipes, pipe relining is a common choice to avoid unnecessary digging .
Keep Those Tree Roots Out Of Your Sewer Pipes!
These tips should keep the root problem out of your pipes, saving you from cascading issues. Sewer line tree roots in your pipes are the beginning of the degradation of your plumbing, after all.
The issue has remained constant throughout the advances in plumbing, and solutions are now more readily available after the age of trials. If your plumbing has excessive problems, contact professional plumbing services for help.
The issue won’t take long to become significantly less manageable, so vigilance and regular maintenance are essential when dealing with root growth. Contact our Melbourne plumbers at WP Plumbing on (03) 9122 8652 for assistance.
Published by: Pascal Harb28 October 2025