Trees look beautiful but, when a tree becomes unstable, they can quickly turn from a garden highlight into a hazard. Spotting trees at risk before they fall can potentially help you to avoid property damage, injuries, and emergency removals.
Whether you’re a homeowner or look after the grounds of a commercial property, understanding how to spot a tree at risk of falling will help you act before a dangerous tree becomes a serious problem.
Check the trunk for structural weakness
A tree’s trunk is its main core support system, so issues here can signal significant risk. Look for deep cracks, cavities, or sections of missing bark, as these may indicate decay. Fungal growth, such as mushrooms sprouting from the base or along the trunk, can be another worrying sign, as fungi often thrive on rotting wood.
A hollow sound when tapping the trunk lightly with a stick can also suggest weakness. While some cavities may be harmless, large or expanding ones should always be assessed by a professional.
Inspect the roots and base
Roots are the foundation of a tree’s stability, but problems often go unnoticed until the tree begins to lean. Visible root damage, such as exposed roots that appear rotten, cracked, or severed, can cause issues with structural support. Soil heaving, where the ground around the tree lifts or cracks, may signal that the root system is struggling to anchor the tree. If the tree suddenly begins leaning, especially after a storm or heavy rainfall, it can be a sign that the roots are losing their grip.
Look at the branches
Dead or dying branches are a sign that a tree could be at risk. If branches appear brittle, fail to produce leaves in season, or break off easily, the tree may be suffering with internal decay or disease. Keep an eye out for branches that grow in tight “V” shapes, as these junctions are prone to splitting under pressure. Trees with uneven canopy growth, where one side is full and the other sparse, may be compensating for structural issues.
Check for signs of disease or pests
Many tree-related problems begin with pests or diseases. Discoloured leaves, premature leaf drop, oozing sap, or unusual patterns on the bark may all indicate infestation. Boring insects, such as beetles, often leave small holes or sawdust-like material at the base of the trunk. While not all pests pose an immediate risk of collapse, long-term infestation weakens the tree and increases the chance of falling.
Pay attention to environmental changes
Environmental changes can stress even the healthiest trees. Recent construction, soil compaction, changes in water drainage, or landscaping modifications may damage roots or destabilise the tree. Strong storms, heavy snow, and high winds can also weaken a tree’s structure over time. If a previously healthy tree starts showing sudden stress after environmental changes, it’s worth calling a professional.
When in doubt, consult an arborist
While many warning signs are visible, determining the severity of the risk often requires expert assessment. Certified arborists can evaluate internal decay, root stability, and overall health using specialised tools. Early consultation can save a tree or prevent a dangerous situation from escalating, so always consult a professional if you’re in doubt.
Spotting trees at risk before they fall is essential for safety and property protection. By staying observant and acting quickly when warning signs appear, you can help maintain a healthy and secure landscape.
If you have a tree that looks like it might be at risk, contact us today to find out how we can help before the situation escalates.