Subsidence and trees

Quick facts about trees and subsidence

  • Trees only cause subsidence on shrinkable soils. In practice, this means on clays. If you are on a sandy soil, for example, tree related subsidence simply doesn't happen
  • The vast majority of urban trees in the UK have never been involved in damage to a building and never will be
  • Tree related subsidence involves many variables and is consequently almost impossible to predict
  • When damage happens it is slow and progressive. If dealt with early it will often be inexpensive to correct. You will not wake up one morning to a gaping hole in your wall!
  • Tree related subsidence is less common on newer properties. This is because modern building regulations require substantial foundations if there is clay soil present
  • Damage to conservatories is particularly common. This is partly because many conservatories are exempt from building regulations and are built with foundations that are inadequate. Poor tying in to the main building is also an issue.
  • Damage to extensions is also common. As with conservatories, poor tying in to the main house is partly to blame. Another significant issue is different foundation depths to the main house, resulting in house and extension moving at different rates.