7 Signs a Tree Needs to Come Down Before It Falls

Is My Tree Dying — Or Just Stressed?

Most homeowners contact me after a windstorm rattles a big oak and leaves them staring out the window wondering, *is that thing going to fall on my house?* It's a fair question, and the answer isn't always obvious.

At Cedar & Oak Tree Co., our philosophy is simple: we remove trees only when they genuinely need to come down. A sick tree isn't automatically a dead tree, and a leaning tree isn't automatically a falling tree. But some combinations of defects cross a threshold where the risk to people and property outweighs any benefit of keeping the tree. Below are the seven signs I look for on every hazard assessment — the ones that tell me a removal conversation is necessary.

Sign 1: Major Deadwood Hanging Over a Target

What it looks like: Large branches — typically two inches in diameter or bigger — that have lost their bark, turned gray or brittle, and no longer produce leaves.

Why it matters: Dead wood doesn't bend; it snaps. A branch the diameter of your forearm falling 40 feet carries enough force to kill. When that deadwood hangs directly over a roof, a patio, a driveway, or anywhere people walk, it's called a "target situation" in arborist language, and it demands immediate attention. Sometimes selective deadwooding is enough. But when the majority of a tree's structure is dead — especially in the main scaffold branches — the tree itself becomes the hazard.

Sign 2: Large Cavities or Decay With Fungal Conks at the Base

What it looks like: A hollow void in the trunk, often visible as a dark opening. Shelf fungi (conks) growing from the base or root flare are an especially serious indicator.

Why it matters: Conks are the fruiting bodies of wood-decay fungi. By the time you can see one, the fungus has already been consuming the wood from the inside for years. A study from the ISA found that trunk decay reducing the wall thickness to less than one-third of the trunk's radius significantly increases failure risk. I use a mallet tap test and, when needed, a resistograph drill to measure internal decay. Cavities at the base are worse than cavities higher up — the base is where all the bending stress concentrates during wind loading.

Arborist note: Not all fungi spell removal. Some species decay only sapwood and leave the structurally important heartwood intact. Species identification and cavity geometry both matter — get an on-site assessment, not a phone diagnosis.

Sign 3: A Sudden Change in Lean or Visible Root Heave

What it looks like: A tree that has noticeably shifted its angle since you last paid attention, or soil cracking and mounding on the side opposite the lean.

Why it matters: Trees can grow with a natural lean for decades without issue. What's alarming is a *change* — a tree that stood plumb last spring and now leans toward the house. Root heave (the soil lifting on the compression side) means the root plate is actually pulling out of the ground. This is one of the most urgent signs I see. Unlike above-ground defects that develop slowly, a tree that has begun to uproot can fail fast, and there is very little intervention that can reverse it.

Sign 4: Cracks and Weak Codominant Stems With Included Bark

What it looks like: Two or more main stems of roughly equal size arising from the same point, with what looks like a dark seam or ridge of bark pinched between them. Or vertical splits running down the trunk.

Why it matters: A true branch union has a "branch bark ridge" — a raised collar that mechanically locks the branch. Codominant stems with included bark lack that interlocking wood grain. The bark embedded between them acts like a wedge, and under wind load or ice weight the union can split violently. Large cracks extending through the trunk are similarly severe. Cabling can sometimes reinforce these unions if the rest of the tree is sound, but when included bark runs deep and the stems are massive, the risk-to-benefit math often favors removal.

Sign 5: Extensive Trunk Damage or Large Areas of Missing Bark

What it looks like: Wounds from lawn equipment, old topping cuts that never properly compartmentalized, fire damage, or long vertical strips of bark that have sloughed away.

Why it matters: Bark is a tree's armor. Repeated wounding allows decay fungi, insects, and disease to enter. One small scar rarely matters. But when wounds circle more than a quarter of the trunk's circumference (called "girdling"), the tree's vascular system is compromised. Similarly, old topping cuts — those flat, over-large pruning wounds from years past — almost never seal properly and frequently lead to internal columns of decay that aren't visible from the outside. I see this constantly on silver maples in Columbus suburbs that were topped in the 1990s. Many of those trees are structurally hollow today.

Sign 6: More Than 50% Canopy Dieback, or Failure to Leaf Out in Spring

What it looks like: A canopy that leafs out in May but leaves half the branches bare. Or a tree that simply never wakes up in spring — no buds, no leaves, no movement.

Why it matters: A tree that has lost more than half its living crown has lost more than half its ability to produce the food and hormones that maintain its wood. Dieback of this magnitude is rarely reversible. The tree will typically continue to decline, shedding limbs progressively as it dies from the top down — a process called "dieback" that can take several years and produce hazardous dead branches every season. Economically and from a safety standpoint, it usually makes more sense to remove the tree now on a planned schedule than to deal with emergency removals piecemeal.

One caution here: Ash trees killed by the emerald ash borer become brittle very quickly after death. If you have a dead ash anywhere near targets, don't wait.

Sign 7: Roots Damaged by Construction or Lifting Foundation Hardscape

What it looks like: A large tree adjacent to recent trenching, grading, or excavation. Or roots visibly lifting sidewalks, driveway aprons, or the foundation itself.

Why it matters: Most of a tree's absorbing roots live in the top 12–18 inches of soil, spreading well beyond the dripline. Construction that cuts through that zone can kill 30–50% of a tree's root system without the damage being visible for two to four years. By the time the canopy shows it, the structural roots anchoring the tree may already be dead and rotting. Roots that have lifted hardscape tell a different story — those are typically healthy roots, but their proximity to the foundation creates a long-term risk of structural damage that removal (and root barrier planning) can address.

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Not Every Flaw Means Removal

I want to be direct about something: most trees with one of the above issues don't automatically need to come down. The decision depends on three things — the severity of the defect, the species (some trees compartmentalize decay far better than others), and the target (a dying tree in a back corner away from structures is a very different situation than the same tree overhanging a bedroom).

Many trees showing early-stage versions of these signs can be managed with crown reduction, selective deadwooding, or dynamic cabling systems. An honest arborist should walk you through those options before quoting a removal. If someone looks at your tree for 30 seconds and immediately says it needs to come down, get a second opinion.

Get a Free Hazard Assessment From a Certified Arborist

If you're seeing one or more of the signs above, don't wait for the next storm to make the decision for you. I'll come out, assess the tree against ISA standards, and give you a straight answer — save it, treat it, or take it down, and why.

Book your free quote or call us at (555) 234-9100. We serve Columbus and the surrounding suburbs, and we'll never sell you a removal you don't need.

*Marcus Cedar, ISA Certified Arborist #OH-9912A — Cedar & Oak Tree Co., Columbus, Ohio*