Six to eight people working for two months were able to completely built the house.

The finishing touch was a notched pole leaned up against the raised floor: this is used as a stair leading to the house's only door.

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Experimental reconstruction of a neolithic house at Chalain.

Notched pole.

Notched pole used to reach the raised floor.

Chalain 4, 31st century BCE.

The result: a sturdy house that for 11 years stood up to rain, snowfall, gusts of wind and floods.

In its twelfth year, the house collapsed on its side when the load-bearing posts rotted through at ground level. Indeed, dendrochronological analysis has shown that the average life-span for these houses on stilts was eight to twelve years.