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Ottawa West (613) 291-3311
Ottawa East (613) 834-3922

Ottawa Hazard Tree Evaluation

Hazard Tree Evaluation is a professional and scientific way to determine whether or not the health and safety of a tree is adequate for the surroundings that it is growing in. There are many targets in our urban forests from houses and streets, to people and even power lines.

Ottawa Arborists - Tree Hazard EvaluationIf the trees are to be left to grow to their full potential, we must make sure for safety reasons that they are healthy and are present with little risk to the public. Several tests are performed on a tree. Applying the data gathered to certain calculations, a conclusion is achieved to let the client know in their opinion, whether the tree in question should be removed due to safety reasons.

Sometimes a tree's health is obvious to the trained eye and tests are not necessary, but for the ones that are in question, two different tests can be performed.

One test is a drill sample test, which enables us to examine the colour of the tissue inside the tree. If the colour of the wood shavings that come out of the tree are white, it is healthy tissue. If the shavings extracted out of the tree are brownish, black, or even discoloured in any way, it may indicate that there is decay present inside.

The second test can be performed by an instrument called an increment borer. This device will be manually drilled into the tree's interior and a core sample can be obtained to examine the tissue colour for decomposition of the wood.

Drill Core Sample Test

Ottawa Arborists - Tree Hazard Evaluation

Ottawa Arborists - Tree Hazard Evaluation

Ottawa Arborists - Tree Hazard Evaluation

Ottawa Arborists - Tree Hazard Evaluation

Increment borer test with sample of tissue.

Ottawa Arborists - Tree Hazard Evaluation

Core sample taken will show if there is any internal decay.

Ottawa Arborists - Tree Hazard Evaluation

Ottawa Arborists - Tree Hazard EvaluationThere are many things that cause a tree to decay internally, from poor soil drainage, to man made wounds caused during construction. Sometimes the tree may callous over a wound as a natural healing procedure, but most of the time the decay process has entered through the entrance of the wound before the tissue has closed. Over time, the decay increases and the health of the tree deteriorates. A tree may appear to be healthy with a full canopy of foliage, but in fact there may only be a small amount of living tissue on the interior, just under the bark. This would be considered a hazardous tree, due to the fact that there is very little core strength to support the tree. Only tests that would be performed could determine how much wood is actually present. These drilling tests are a last resort to determine how much wood is at hand, and does inflict wounds to the tree. It is not a test that should be performed on a tree that is not suspected of being a hazardous tree.

Hazardous Trees Gallery