Risk from a tree is a combination of two things: the chance a part fails, and what is underneath when it does. Most of the trees we assess score low on the second half of that equation. A tree over a play structure, a trampoline, or the corner of the yard where kids actually spend their summer does not.
This is not an argument for cutting trees down around children. Shade over a play area is genuinely valuable. It is an argument for looking up deliberately at those particular trees, on a schedule, rather than assuming.
What to Look For Overhead
Start with deadwood. Dead branches in the canopy are the most common thing that falls, and they fall without wind, on ordinary days. Look for limbs with no leaves in summer, bark peeling off, or a grey weathered look compared to living wood.
Then look at the unions where large limbs meet the trunk. Cracks, splits, bark turned inward rather than raised and ridged, and any limb that has sagged noticeably over a season all deserve a closer look.
Signs of Decay in the Trunk
Mushrooms or hard shelf-like conks growing from the trunk, roots, or a branch union indicate wood decay fungi at work inside. They are not always a reason for removal, but they always warrant an assessment because the visible fruiting body means decay is established.
Cavities, soft or hollow-sounding wood, oozing liquid, and sawdust-like frass at the base are all worth reporting to someone who can evaluate them properly.
The Rope Swing Question
A rope over a branch chafes the bark, and a rope left in place for years wears a groove and can girdle the limb. Anchoring with bolts or lag screws is generally kinder to the tree than a rope that saws back and forth, provided the branch is sound and sized for the load.
The bigger question is the branch. A swing puts dynamic load, far more than static weight, on one limb, and it should be a large, healthy, well-attached branch rather than whatever is at a convenient height. If the branch has any defect, choose a different tree.
Timing an Inspection
The best time to look is twice a year: once in full leaf, when a dead branch stands out because it has no leaves, and once in winter when the branch structure is fully visible without foliage hiding cracks and unions.
Binoculars make this far more useful than squinting from the lawn. Ten minutes twice a year catches most of what matters.
After Storms, Look Again
Calgary storms leave hangers, partly broken branches caught in the canopy that can drop hours or weeks later. Those are a specific hazard over a play area and should be removed rather than waited out.
Also check after heavy wet snow and after any hail event, both of which stress limbs and can crack unions without bringing anything down immediately.
Getting a Proper Assessment
If anything on this list turns up over a space kids use, an assessment is cheap relative to the consequence. The recommendation is often minor: remove some deadwood, reduce an overextended limb, or move the trampoline three metres.
Aardvark Tree Care assesses trees across Calgary and will tell you straight whether a tree over your play area needs work now, needs watching, or is fine as it is.
Risk is likelihood times consequence, and a play structure changes the consequence side completely.
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