05/27/2026
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Trees with significant trunk decay can be extremely hazardous because the tree may continue to appear healthy on the outside while structurally failing on the inside. As decay progresses within the trunk, the tree often continues producing new leaves, branches, and canopy growth each season. This added foliage increases the overall weight and wind resistance of the canopy, placing additional stress on an already weakened structure. To the untrained eye, the tree may look vibrant and alive, creating a false sense of safety when, in reality, the internal wood fibers responsible for strength and stability may be severely compromised.
Unlike obvious dead trees, hollow or decayed trees can fail suddenly and without warning. Internal rot weakens the trunk’s ability to support the canopy, especially during storms, high winds, or saturated soil conditions. In many cases, only a thin outer shell of sound wood remains supporting thousands of pounds of canopy weight. This is why professional evaluation by a Certified Arborist is so important when signs of trunk decay, cavities, fungal growth, or hollow sections are present. Early detection and proper risk assessment can help prevent catastrophic property damage, injuries, or fatalities caused by unexpected tree failure. Valley
