Wattle and daub (or wattle-and-daub) is a building material used for making walls, in which a woven lattice of wooden strips called wattle is daubed with a sticky material usually made of some combination of wet soil, clay, sand, animal dung and straw. Wattle and daub has been used for at least 6,000 years, and is still an important technique in many parts of the world. Many historic buildings include wattle and daub construction, and the technique is becoming popular again in more developed areas as a sustainable building technique.