Do you know what the function of tile is in ancient architecture?

Tile, also known as "tile head", refers to the specific part hanging down from the top of ceramic tile. Tiles, that is, ceramic sheets with circular arcs, are used to cover the roof; The so-called "dang" is explained as follows: "Dang also covers the tile at the bottom, just as the tile at the bottom is better than the eaves and the tile covers the tile, which is worthy of the name." The tile is the first end of the tile, which was used for the roof of ancient buildings in China. Its main functions are waterproof, drainage and protection of wooden frame. Practically, it is not only convenient for the roof to leak rain, but also plays a role in protecting the eaves and increasing the beauty of the building. Its styles are mainly circular and semi-circular. Tile is an important part of ancient architectural tile.