Is there a layer of mud that will seep out when it rains?

There is a layer of mud, which will not seep when it rains. Single-layer mud swimming roofs are widely used in some traditional buildings. Good waterproof performance, can effectively resist the infiltration of rain, so the mud swimming roof on the first floor will not seep when it rains. Mud is a traditional roof covering material, also known as clay tile or clay tile. It is a roof tile made of clay, which is usually red or reddish brown.