Tree work is one of the most dangerous occupations in North America, and it is also one of the easiest industries to enter without proper training, equipment, or insurance. Every spring in Calgary, a wave of operators appear offering cheap tree work, and every year homeowners end up with damaged property, injured trees, and no recourse when things go wrong. Here are the warning signs that should make you walk away from a tree service company.
They Show Up Uninvited
The classic door-knocker scenario: someone appears at your door, often right after a storm, and says they noticed your tree needs work. They happen to be in the neighbourhood, they have their equipment right there, and they can give you a great deal if you decide today. This high-pressure, door-to-door approach is the hallmark of transient operators who are not established in the community and have no reputation to protect.
Reputable tree service companies in Calgary are busy enough that they do not need to solicit work door to door. Their schedules are filled through referrals, repeat customers, and online inquiries. If someone shows up uninvited offering tree work, politely decline and call an established company instead.
They Cannot Show Proof of Insurance
This is the single most important thing to verify before hiring any tree service. Professional tree companies carry commercial general liability insurance, typically $2 million or more, and provide workers' compensation coverage for their employees. This insurance protects you if the crew damages your property, your neighbour's property, or if a worker is injured on your premises.
Ask for a certificate of insurance and verify it is current. Do not accept a photocopy of an expired policy or a verbal assurance that they are covered. If a company hesitates or refuses to provide proof of insurance, do not hire them. An uninsured operator working on your property puts your personal liability at risk.
They Recommend Topping
Tree topping is the practice of cutting branches back to stubs or cutting the main trunk to reduce the tree's height. It is condemned by every credible arboriculture organization in the world because it destroys the tree's structure, triggers a burst of weak regrowth, creates decay entry points, and ultimately makes the tree more dangerous than it was before.
Any company that recommends topping does not understand basic tree biology. If you ask for a tree to be reduced in size, a qualified arborist will recommend crown reduction pruning, which achieves size reduction through proper cuts at branch junctions while maintaining the tree's structural integrity and natural form. The difference in outcome between topping and proper crown reduction is dramatic.
They Want Payment Upfront
It is reasonable for a tree service to request a deposit for very large jobs, but demanding full payment before work begins is a red flag. Established companies with good cash flow do not need your money upfront to buy fuel or pay their crew. A request for full prepayment often indicates a company that is financially unstable or, worse, one that takes the money and disappears.
Standard practice in the industry is to collect payment upon completion of the work, after you have had a chance to inspect the results and confirm that the agreed-upon scope has been fulfilled. If a deposit is requested, it should be a reasonable percentage, typically 10 to 25 percent, not the full amount.
No Written Quote or Contract
A verbal estimate is not a quote. If a company will not put their price and scope of work in writing, you have no protection if the final bill is different from what was discussed or if the work performed does not match what was agreed upon. A professional quote should clearly describe what trees are being worked on, what work will be done, what is included in the cleanup, and the total price.
The written quote also protects the tree company, so there is no legitimate reason to avoid providing one. If someone says they will just do the work and figure out the price after, you are setting yourself up for a surprise bill with no leverage to dispute it.
They Use Climbing Spikes on Living Trees
Climbing spikes, also called gaffs or spurs, are metal points strapped to the climber's boots that dig into the bark for traction while ascending. They are an essential tool for tree removal, where the damage to the trunk does not matter because the tree is coming down. However, using spikes on a tree that is being pruned punctures the bark dozens of times, creating wounds that are slow to heal and provide entry points for disease and insects.
A professional arborist climbing a tree for pruning uses a rope-and-saddle system or an aerial lift. If you see a climber strapping on spikes to prune your tree, stop the work. They are damaging the tree with every step.
No Business License or Credentials
In Calgary, businesses are required to have a valid business license to operate. Beyond that, credible tree service companies employ certified arborists through the International Society of Arboriculture, have a verifiable business address, maintain a professional website, and have a track record of reviews and references.
Check Google reviews, ask for references from recent jobs, and verify their business license with the City. A company that has none of these things may be perfectly skilled, but you have no way to verify that and no recourse if they are not.
Pressure Tactics and Scare Stories
Beware of anyone who tells you a tree needs to come down immediately or it will fall on your house tonight. While genuine emergencies exist, most tree situations are not as urgent as an unscrupulous operator would have you believe. A tree that has stood for 50 years is very unlikely to catastrophically fail in the next 24 hours unless there has been a major weather event or new structural damage.
Get a second opinion. A reputable arborist will give you an honest assessment of the urgency and let you make an informed decision without pressure. If someone is rushing you toward a decision, that urgency is probably more about their schedule than your safety.
Finding a Good Tree Service
The best way to find a reliable tree service in Calgary is through recommendations from neighbours, friends, or your local garden centre. Check online reviews on Google and look for companies that respond professionally to both positive and negative feedback. Verify insurance, get a written quote, and trust your instincts. A company that communicates clearly, shows up on time for the estimate, and answers your questions patiently is likely to deliver the same level of professionalism on the job.