Tree roots are one of the most common causes of property damage in Australian suburbs. Whether they are cracking your driveway, invading your sewer line, or undermining your house foundation, dealing with problematic roots requires careful planning to avoid making the situation worse.
Common Problems Caused by Tree Roots
Tree roots follow moisture and nutrients, which often leads them directly into conflict with residential infrastructure. The most common issues include cracked and lifted driveways and footpaths, blocked and damaged sewer and stormwater pipes, foundation damage causing cracks in walls and uneven floors, disrupted retaining walls, and damaged swimming pools.
Root Removal Methods
Selective Root Pruning
If the tree is to be retained, an arborist can selectively prune specific roots that are causing damage. This involves excavating to expose the problematic roots, cutting them cleanly, and installing a root barrier to prevent regrowth in the same direction. This must be done carefully, as removing too many roots from one side can destabilise the tree.
Full Root System Excavation
When the tree has been removed and the root system needs to come out entirely, excavation using a mini excavator or bobcat is the most efficient approach. Professional root removal ensures underground services are not damaged during the process.
Chemical Root Treatment
For roots invading sewer lines, plumbers often use chemical treatments such as copper sulphate or specialised foaming root killers to destroy roots within the pipe. This is a management strategy rather than a permanent solution, as roots will typically regrow unless the tree is removed or a physical barrier is installed.
How Much Does Root Removal Cost?
Root removal costs vary significantly depending on the extent of the work. Simple root pruning might cost $300 to $800, while full root system excavation after tree removal can cost $1,000 to $5,000 or more depending on the tree species, root spread, and proximity to structures and services. The overall cost of tree removal including root work should be discussed as a package when getting quotes.
Factors That Affect Cost
- Extent and depth of the root system
- Proximity to underground services, foundations, and retaining walls
- Whether the root system is intertwined with infrastructure
- Access for excavation equipment
- Disposal and site restoration requirements
When to Call a Professional
Any root work near structures, underground services, or large trees should be handled by a professional. Cutting roots incorrectly can destabilise trees, causing them to fall, or can damage pipes and cables. If tree roots are already blocking your pipes, read our detailed guide on tree roots in pipes for specific advice on that situation.
Dealing with damaging tree roots? We connect you with qualified arborists and root removal specialists who can assess the problem and recommend the right solution. Find a root removal professional near you for expert advice and obligation-free quotes.