In this video, Quinton Garlick from Cut It Right Tree Service is on-site in Red Hill South, right next door to Merricks, to inspect a major structural failure on a mature gum tree and explain how V-unions fail in severe weather.
The Anatomy of a Storm Failure: Why V-Unions Split
It is a common sight across Red Hill South, Merricks, and the wider Mornington Peninsula: after a night of heavy rain and coastal winds, a beautiful, mature gum tree has lost a major half of its trunk. To the untrained eye, these failures seem sudden and unpredictable. However, to a certified arborist, the warning signs are often written into the tree's architecture years before the branch actually breaks.
Recently, Quinton Garlick was called out to a rural property in Red Hill South to inspect a major limb failure. A mature gum tree had split right down the middle, dropping a massive portion of its weight onto the paddock below.
The Science of "Included Bark" and Weak Joints
When Quinton inspected the fallen limb, the cause of the failure was immediately clear: the tree had developed a classic V-shaped union (or codominant stem).
To understand why this is such a major hazard, it helps to use a simple analogy. Think of a strong tree joint like a seamless weld on a metal frame. When two branches grow in a wide "U" shape, the wood fibers interlock completely, creating a single, solid piece of structural wood.
However, a V-union behaves more like a zipper on a jacket. As the two trunks grow thicker, they press tightly against one another:
- The Squeeze: The bark growing on the inside of the V has nowhere to go, so it gets trapped and squeezed deep inside the joint.
- The Decay: This trapped "included bark" prevents the wood from fusing together, creating an internal seam of dead tissue that is highly vulnerable to moisture, rot, fungi, and insects.
- The Leverage: When we get heavy winter rains, the foliage in the canopy acts like a giant sponge, absorbing water and adding massive weight. When coastal winds hit the canopy, they act like a crowbar, pushing the heavy, water-logged trunks in opposite directions until the weak seam finally zips open.
Leaving Fallen Wood as Natural Habitat
On rural properties or open farm paddocks, a fallen branch does not always have to be completely mulched and cleared away. In the Red Hill South video, Quinton highlights a great way to handle fallen timber when it lands safely in a paddock.
If a fallen limb does not block paths, fences, or driveways, we can simply trim back the dangerous, splintered branches and leave the main, solid log on the ground. Mature farm animals-particularly cows-absolutely love having sturdy logs in their paddocks. They use the rough, solid wood as natural "scratching posts" to rub their heads and necks on, which provides great comfort and keeps them happy.
Furthermore, leaving some deadwood on the ground provides a crucial environmental boost, creating essential shelter and nesting habitats for local birds, insects, and native Peninsula wildlife.
Protecting Your Mornington Peninsula Trees
The best way to manage a V-union tree is to address it before a catastrophic failure occurs. By having a qualified arborist from Cut It Right Tree Service perform a professional tree hazard assessment, we can identify weak joints, hollows, and included bark early.
Depending on the tree's health, we can implement preventative measures to keep your property safe:
- Weight Reduction: Pruning the heavy tips of the canopy to take the physical leverage and strain off the weak joint.
- Dynamic Bracing: Installing a flexible synthetic support system (such as Yale bracing) that catches the limb if it fails, protecting your fences, carport, or home.
- Controlled Removal: If the split has already progressed too far, our skilled climbers can execute a highly controlled removal to safely dismantle the tree piece-by-piece.