Signs You Need a Certified Arborist

Plenty of tree care is genuinely DIY: watering, light shaping of small branches, mulching, watching for problems. But some situations call for a professional, not because pros want your money, but because the work is dangerous, the tree is valuable, or a wrong move can't be undone. Here's how to tell which is which.

Call a Pro When the Work Is Dangerous

Tree work sends thousands of people to the ER every year. Hand these jobs to insured professionals with the right equipment:

• Anything near power lines. Branches close to utility lines are a job for trained crews and utilities, never a ladder and a pole saw.
• Large limbs or whole-tree removal. Big wood is heavy and unpredictable, especially when it's dead, leaning, or under tension after a storm.
• Work that requires climbing or a lift. If your feet leave the ground with a saw in hand, the risk jumps dramatically.
• Storm-damaged trees. Bent, split, and partially fallen wood is under load and can snap or kick back violently.

Call a Pro to Protect the Tree

Other times the danger is to the tree, not to you:

• Major pruning. It's easy to over-cut, lion-tail, or top a tree without realizing the long-term harm. Bad pruning can't be reversed, the tree lives with it for years.
• A declining tree you can't diagnose. Yellowing, wilting, dieback, peeling bark, or sudden decline could be any of several Arizona problems that look alike. A correct early diagnosis often saves the tree.
• Valuable or mature specimens. A large, established shade tree is worth thousands in property value and decades of growth. It's worth an expert's eye.
• Suspected disease or pests. Some conditions spread through the landscape or through dirty tools; proper identification and sanitation matter.

Warning Signs That Warrant an Assessment

Have a tree looked at soon if you notice:

• A lean that's new or increasing, or soil lifting / cracking near the base
• Cracks, cavities, or soft, decayed wood in the trunk or major limbs
• Mushrooms or conks growing at the base or on the trunk (a sign of internal decay)
• Large deadwood or hanging limbs, especially over a house, driveway, or walkway
• Roots damaged by trenching, construction, or hardscape work

What "ISA Certified Arborist" Actually Means

Not everyone with a chainsaw and a truck is an arborist. A Certified Arborist has passed a comprehensive exam through the International Society of Arboriculture, maintains the credential through continuing education, and follows industry standards and a code of ethics. For risk assessment specifically, look for the TRAQ (Tree Risk Assessment Qualification) credential.

When hiring, it's also fair to ask about liability and workers' compensation insurance, tree work is high-risk, and you don't want that liability landing on your homeowner's policy.

The Bottom Line

A good rule of thumb: if the job involves height, heavy wood, power lines, a tree you'd hate to lose, or a problem you can't confidently identify, get a professional. Everything else, you can likely handle with the basics in this wiki.

TCGS has cared for West Valley trees since 1986, with certified arborists on every tree job. If you'd like a tree assessed, diagnosed, or safely pruned, book a tree care assessment or explore our full range of tree care services.

This guide is part of the TCGS Tree Care Wiki. Need hands-on help? Book a tree care assessment with our certified arborists.