Risk Assessment

Risk Assessment Basics

Certified arborists do tree risk assessments. It tests the likelihood that a tree will fail and cause damage and/or injury. It is part of the standard of care.

Tree risk assessment considers three factors:

1. What is the potential for tree failure?
2. Factors in the environment that can contribute to failure.
3. Potential targets; what’s in the way?

An experienced tree care professional, such as a Certified arborist looks at many things. He considers the tree species, growth habit, defects, the root system, and the growing conditions.

The arborist also considers the use of the site and discusses acceptable levels of risk with the property owner. Not all tree trimming companies provide risk assessment services.

Tree Inspections

A tree risk assessor examines the tree to determine its overall integrity. He recognizes hidden damage and can use specialized tools, including the Resistograph. This unique instrument reveals the inner life of the tree, including unseen decay.

He may find damage to walkways, driveways, foundations, water lines, and other structures.

An expert tree evaluation will produce a hazard rating. This helps organize pruning, removals, and other management activities. A risk assessment considers potential damage and the likelihood and results of tree failure.

Risk Management

Some trees pose an unacceptable risk and we recommend removal. Some times we can save a tree, but the final decision is up to the property owner.

Competent assessment requires a strong foundation in tree biology and years of experience. When you’re evaluating tree trimming companies look for one with specialized arborists that have demonstrated professional knowledge and are Certified Tree Risk Assessors.