Homeowners with oak trees in their gardens are being cautioned about the potential risks these trees could pose to their properties, as well as the legal consequences of cutting them down.
English oak trees, known for their majestic appearance and ecological benefits, are among the most common and cherished trees in the UK. They are particularly favored by the Royal Family and contribute significantly to local wildlife habitats. However, if situated too close to a house, these trees may increase the risk of subsidence, depending on the soil type and the construction date of the property.
Subsidence occurs when a house’s foundations become unstable, causing cracks in walls, ceilings, doorways, and even structural damage. This issue is particularly prevalent in areas with clay soil, which is prone to shrinking as tree roots absorb moisture. English oaks, being high-water uptake species, are known to contribute to this problem, especially when located within a distance equal to their height from a property.
One homeowner voiced concerns online about purchasing an Edwardian terraced house in South London, which is close to a large oak tree. The area is known for its clay soil, increasing the risk of subsidence. Experts caution that cutting down the tree could exacerbate the issue by disrupting the soil’s moisture balance.
According to tree specialists, the risk of subsidence varies depending on the age and size of the tree. Mature oak trees are particularly significant as their extensive root systems can extend far and provide crucial structural stability. Cutting through these roots could destabilize the tree, potentially leading to further complications, including legal issues if the tree is protected under a Tree Preservation Order (TPO).
The Woodland Trust explains that subsidence is more likely in homes built before the 1950s, as these properties often have shallower foundations. Modern buildings are generally less affected. Additionally, the risk of subsidence increases during periods of extreme weather fluctuations, which are becoming more common due to climate change.
Despite the risks, oak trees offer immense benefits, including carbon sequestration, wildlife habitats, and shade for surrounding areas. Homeowners are encouraged to seek professional advice before making any decisions about tree removal.
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