The traditional type of house in Lesotho is called a rondavel. A rondavel is a type of traditional African home. It is typically circular in shape and is traditionally produced with raw materials that may be sourced locally. The walls of a rondavel are frequently made of stones. In some cases, wood or mud is used instead. There are several types of rondavals. Some are one room while others have multiple rooms. All tend to follow a similar design and use many of the same materials. They can be built for either seasonal or permanent use. When built for temporary use, they have roofs that are designed to be taken down and moved to another location if needed. Rondavals are common throughout Africa. There have been efforts by NGOs to revive their use through education programs about building skills. In addition to rondavals, Lesotho has many other types of houses including thosemade from metal, cardboard, and clay. Although these houses are used for special occasions or when money is no object, they are usually not suitable for living in long-term as they do not have adequate insulation values. Traditional houses in Lesotho were often made of mud bricks or stone. However, since the 1970s, concrete has become widely used as it is more durable and does not require constant maintenance like brick or stone buildings do.