High Quality Content by WIKIPEDIA articles! A mudbrick is a firefree brick, made of a mixture of clay, mud, sand, and water mixed with a binding material such as rice husks or straw. They use a stiff mixture and let them dry in the sun for 25 days. In warm regions with very little timber available to fuel a kiln, bricks were generally sun dried. This had the result that their useful lifespan is reduced to around thirty years. Once a building collapsed, new bricks would have to be made and the new structure rebuilt on top of the rubble of the decayed old brick. This phenomenon is the primary factor behind the mounds or tells on which many ancient cities stand. In some cases they extended the life of mud bricks by putting kiln dried bricks on top or covering them with stucco. Adobe is a type of mudbrick also used today to save energy and is an environmentally safe way to insulate a house. This type of house tends to stay cool in the summer and warm in the winter.

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