The Akha dwellings are traditionally constructed of logs, bamboo, and thatch and are of two types: "low house," built on the ground, and "high house," built on stilts. The semi-nomadic Akha, at least those who have not been moved onto permanent village sites, do not typically build these houses as permanent residences and will often move their villages. Some say that this gives the dwellings a deceptively fragile and flimsy appearance, although they are built quite well; the design has been tested for generations.[7]