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Article: how and why cob is used as a building material.
Cob is a construction material that is made of completely naturally occurring material such as sand, clay, earth, water, and straw. It is entirely fireproof and capable of resisting earthquakes.
The usage of Cob dates back to prehistoric times—the earliest recorded usage being as old as the 11th century. The traditional English way to make Cob is to mix clay soil with straw, sand and water by trampling it.
Once they are ladled onto stone foundations or trodden on walls, they are left to dry, after which the wall is trimmed before the next course is applied. Lintels and wooden frames are kept for doors and windows in place.
Present-day experimentations have led to the rise of Balecob – with is regular cob with straw bale thrown in. These cob structures are used in aesthetical buildings made more for their natural detail than their sturdiness. In Wales, Cob is better known as Clom.