Identify and Manage Hazardous Tree Defects and Tree Damage

High-risk defects are signs of tree failure. Look for seven important tree defects: dead wood, cracks, weak branch unions, decay, cankers, root problems, and poor tree form. These tree defects will be described in the next several sections. Remember: a tree with defects is not hazardous unless some portion of it is within striking distance of a target.

• #1- Dead wood: Dead trees and branches are unpredictable and can break and fall at any time. Dead wood is often dry and brittle and cannot bend in the wind like a living tree or branch. A dead branch and treetop that is already broken off (“hanger” or “widow maker”) is especially dangerous.

Act immediately if . . .

• A broken branch or treetop is lodged in a tree. • A tree is dead. • A branch is dead and of sufficient size to cause injury. Typically this is a branch larger than 4 inches in diameter, but this can vary with branch height. Even smaller branches, falling from high in the tree, can cause serious personal injury.)

• #2- Cracks: A crack is a deep split through the bark, extending into the wood of the tree. Cracks are extremely dangerous because they indicate that the tree is already failing.

Act immediately if . . .

• A crack extends deeply into, or completely through the stem. • Two or more cracks occur in the same general area of the stem. • A crack is in contact with another defect. • A branch of sufficient size to cause injury is cracked (typically larger than 4 inches in diameter).




Daryl’s Tree Care

To all our valued clients and the wider community

Amid the COVID-19 health crisis, we are still operating as usual, until advised otherwise by the governing bodies.

We are adhering to strict social distancing and hygiene practises, to help keep our staff and clients safe and healthy.

Clients do not need to be in our presence during quotational visits, or on the day of the tree works.

We are happy for any necessary communication to be done by telephone, if preferred.

We thank you for your understanding and send you all our best wishes.