Subsidence caused by trees can be a cause of concern for homeowners, as it can often lead to structural damage and costly repairs. We at Haringey Tree Co will always look at ways to save and protect trees first and foremost when dealing with the issue of subsidence.  We will ask questions such as - is the subsidence to a lesser structure around the house such as a garden wall? Can this wall be taken down and rebuilt away from the roots of the tree? Will crown management and early intervention reduce the size of the root structure ahead of any real damage being caused to a buildings foundations?

If the answer to these questions is no, and when there is a serious risk to safety, we have no other choice but to remove the tree in order to prevent further damage to the building’s foundations and structural integrity. 

Here’s a quick explainer on some of the causes of subsidence by trees, as well as the signs of subsidence to look out for so that you can recognise when intervention is required.

Causes of subsidence:

• Tree root growth: The primary cause of subsidence by trees is the expansion of their roots. As trees grow, their roots seek moisture and nutrients from the soil. In their quest, they may penetrate and damage the foundations of nearby buildings.

• Soil moisture changes: Trees can influence soil moisture content. During periods of drought, trees may draw excessive moisture from the soil, causing it to shrink and the ground to settle. Conversely, during periods of heavy rainfall, soil can expand, leading to heave.

Signs of subsidence:

Recognising the signs of subsidence early is crucial for prompt intervention. Here are some common indicators:

• Cracks in walls and floors: Look for new or widening cracks in the walls, floors, or ceilings, especially near windows and door frames.

• Sticking doors and windows: If doors and windows become difficult to open or close, it may be due to the shifting of the building's foundation.

• Uneven floors: Sloping or uneven floors, particularly on ground levels, are a clear sign of subsidence.

• Gaps around doors and windows: Noticeable gaps appearing around doors and windows can indicate that the building is settling unevenly.

• External cracks: Cracks in exterior brickwork, rendering, or the foundation itself can signal subsidence.

If you suspect that trees on your property are causing subsidence, seek professional arborist advice from our team. We can determine the tree's species, age, root structure,, proximity to the building and whether removal is required.