Is Your House Cracking Up Over Hot Weather?

BrickFix Masonry Crack Stitching Kit
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Roger looks at the very common problem – Your house cracking, as a result of building on clay and why most should be left untreated.

London is a hotspot for clay-related subsidence. Many properties in Greater London are built on London Clay, which is a highly shrinkable soil type and susceptible to changes in volume caused by high water content.

Why Does London Clay Cause Subsidence?

Subsidence & House cracking occurs when the ground beneath a building or structure sinks or shifts. In the case of London Clay, the primary cause can be moisture variation.

• • During wet periods, the clay absorbs water, expands, and can exert pressure on structures.
  • During dry periods (especially in summer or drought conditions), the clay shrinks, leading to ground movement and potential foundation settlement.

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