What a tree risk assessment looks at
Tree risk depends on three things: the likelihood that part of the tree fails, the likelihood that it hits something, and the consequences if it does. A dead limb over an empty slope is low risk; the same limb over a bedroom or playground is not. We evaluate the whole tree, including roots, root plate, trunk, branch unions and crown.
We look for decay fungi, cavities, cracks, included bark, dieback, lean changes, soil heaving, root damage from construction and signs of insects such as bark beetles. Where needed, we use a sounding mallet and probe to explore suspected decay.
Bow Valley risk factors
Thin, rocky soils limit root depth, so wind-throw is a common failure mode here. Construction trenching for services, driveways and retaining walls often cuts the roots that hold a tree up. Root and butt rots in spruce, and legacy beetle-killed pine, are frequent findings.
Snow load is the other major factor. Trees with co-dominant stems or long, horizontal limbs are more likely to split under wet spring snow, and those weaknesses can often be addressed with pruning rather than removal.
What you receive
After the site visit you receive clear recommendations prioritized by risk level: trees to monitor, trees that need pruning or other mitigation, and trees that should be removed. Each recommendation explains the reason in plain language so you can make informed decisions.
When you need formal documentation for a strata board, insurer, municipality or real-estate transaction, we can prepare a written arborist report. See our arborist report service for details.
Who books assessments
Homeowners concerned about a big tree near the house, property managers responsible for common areas, condominium boards, hospitality operators and buyers doing due diligence on a treed property all book assessments with us.
Assessments are also smart after a major storm, before construction near existing trees, and when a tree's appearance changes suddenly, such as new lean, cracking or rapid needle loss.
Our hazard tree assessment process
- Discuss concerns and targets
- Visual ground-level inspection of each tree
- Advanced checks where warranted
- Risk rating and prioritized recommendations
- Optional written report
Frequently asked questions
How do I know if a tree is dangerous?
Warning signs include dead branches, cracks, cavities, mushrooms at the base, a new or increasing lean, lifted soil around the roots and sudden needle loss. If you notice any of these near a home or walkway, book an assessment.
Is an assessment worth it if I might just remove the tree?
Often, yes. Many trees that look worrying are structurally sound and only need pruning. An assessment can save the cost of an unnecessary removal.
Do you provide written reports?
Yes. Verbal recommendations are included with every assessment, and a formal written report is available when you need documentation.
Can you assess trees on a property I am buying?
Yes. Pre-purchase tree assessments help you understand future costs and risks on treed lots.