Tree Root Damage to Foundations: Signs and Solutions

Tree roots can cause significant damage to building foundations through direct physical pressure and by extracting moisture from reactive clay soils, causing the ground to shrink and shift. Understanding the signs and solutions helps you protect your home.

Signs of Root Damage to Foundations

Watch for cracks in walls (particularly diagonal cracks near doors and windows), doors and windows that stick or will not close properly, uneven or sloping floors, cracks in concrete slabs, and gaps between walls and ceilings. These symptoms may also indicate other structural issues, so professional assessment is important. For pipe-related root damage, see our guide on tree roots in pipes.

How Roots Damage Foundations

In reactive clay soils common throughout Sydney, tree roots extract moisture causing the soil to shrink. This creates differential settlement under the foundation, leading to cracking and structural movement. Large roots can also physically displace lighter structures. An arborist report can determine which tree is responsible and assess the extent of root activity.

Solutions for Root Damage

Depending on the severity, solutions include tree root removal or pruning, root barrier installation, underpinning the foundation, resin injection to stabilise soil, or complete tree removal. The right approach depends on the tree’s value, the severity of damage, and future risk. Read our tree root removal guide for detailed options.

Get Expert Assessment

We connect you with qualified arborists who can assess root damage and work alongside structural engineers. Find a qualified arborist near you for professional root assessment.