This is somewhat the fear of insurers… and owners.
Clay swelling can cause the ruin of many buildings in Île-de-France.
The fault lies with the basement, which functions like a sponge: in the event of drought, it dries out and shrinks, slowly but surely.
But when the heavy rains arrive, it swells again almost instantly: this is where the landslide occurs, too fast to be supported by the houses, which crack and fall apart.
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