What is wattle and daub structures?

Wattle and daub structures involved the "wattling", or weaving, of branches and twigs to make a frame for a wall. Daub was a mixture of mud, straw and/or animal fat which was then applied, or "daubed" onto the walls, into the gaps, to seal the wall against the elements. Wattle and daub structures were common from medieval times through to American colonial and Australian colonial times.