Mud is a building material that has been used for thousands of years. It is still used in modern construction, though the methods have changed. Mud buildings are commonly found in dry, rural areas where mud is abundant. Mud construction can be environmentally friendly as it requires few resources, though it is susceptible to damage from water and requires regular maintenance. Ceramic materials are used to make pottery, bricks, tiles, and other construction products due to their hardness, heat and chemical resistance. However, ceramics are brittle. Terracotta clay is used to make tiles and other building materials due to its durability and aesthetics, though it is porous and can deteriorate if not properly treated.