Giwa (Tile)
Giwa is a construction material for put roofing. It is also called gaewa. One of the basic forms of giwa is amkiwa (flat giwa) and sukiwa (round giwa); one giwa can be made by putting together two of these. Roofs are generally made by this way. Clay is kneaded and is spread thinly. Then amkiwa is extended upward and downward, and sukiwa cover joints at right and left side. By classifying giwa through materials, there are togiwa-made by kneading and baking clay-, cement giwa-made by mixing cement and sand- and metal giwa-made by cutting and making form with metal plate. There were stone giwa and bronze giwa at the ruins of Rome, and marble giwa was used at Greek temples. In addition, there are cheonggiwa, ozigiwa, etc. glazing by various kinds of glaze. As a matter of form, we call original giwa bongiwa and Japanese giwa geolchimgiwa. There are giwa in many countries.
Read more about this topic: Traditional Korean Roof Construction