What is subsidence?

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Subsidence happens when the ground beneath a property moves or sinks downwards, causing the foundations of the building to move. Some soils (and clay) can cause subsidence as it dries and shrinks, trees and other vegetation can cause it by drawing water from the soil, and excessive water from flooding or burst pipes can wash soil away which also causes subsidence. The effect on the building ranges from cracked walls to severe structural damage.