What did sumerians use to make their buildings?

Sumerians used mud bricks to make their buildings. These bricks were made from a mixture of clay, sand, and water, which was then formed into molds and left to dry in the sun. Mud bricks were an ideal building material for the Sumerians because they were cheap and easy to produce, and they provided good insulation from the harsh desert climate. In addition, mud bricks were relatively lightweight, which made them easy to transport and handle.