East Asian hip-and-gable roof
Type of roof in East Asian architecture
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The style is Chinese in origin, and has spread across much of East and Continental Asia. The original Chinese style and similar styles are not only found in the traditional architectures of Japan, Korea, and Vietnam but also other countries such as Mongolia, Buryatia, Kalmykia, Tuva, Bhutan, Tibet and Sri Lanka. A similar, generally taller and originally thatched hip and gable style is also traditionally used in Southeast Asia such as in the Philippines and in Indonesia.
Etymology
It is known as xiēshān (歇山) in Chinese, paljakjibung (팔작지붕; 八作지붕) in Korean, and irimoya (入母屋) in Japanese.
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East Asia
Xieshan in China
In China, the hip-and-gable roof style, also known as the xieshan roof style, is thought to be invented by Huang Jieming, a Chinese inventor from the Eastern Han dynasty, as an adaptation of the hip roof. It was mainly applied in the construction of palaces, temples, gardens and other buildings with official functions. In contemporary times, it is still widely used in Buddhist and Taoist temples and shrines in China.
The style is generally characterized by the presence of nine ridges and a hipped roof encircled with a peristyle. The nine ridges typically consists of one horizontal ridge on the top, known as the main ridge, which is connected to four vertical ridges and four diagonal ridges.
There are typically two types of eaves associated with the xieshan style: single eaves (单檐) and double eaves (重檐). Single eaves refer to the edges of a basic xieshan rooftop, while double eaves consist of an additional layer of eaves below the basic xieshan rooftop. Examples of the double eave type can be found on the xieshan roofs of structures such as Cining Palace, the Gate of Supreme Harmony and the Hall of Preserving Harmony in the Forbidden City, as well as the Grand Hotel in Taipei. Examples of the single eave type can be found on buildings such as Zhihua Temple, the shanmen of Miaoying Temple, and the North Gate of the Walls of Taipei.
Paljakjibung in Korea
Paljakjibung (팔작지붕) is the most commonly used roof type in authoritative architecture during the Joseon Dynasty. Considering that the hierarchy is the highest, regardless of size, most of the central buildings are Paljak. However, in temple architecture in the late Joseon Dynasty, where wood was scarce due to the high demand for wood used for roof furniture, the lower furniture was left intact and only the roof was often replaced by the eight-piece.
Irimoya in Japan
Irimoya arrived from China to Japan in the 6th century. The style was originally used in the main and lecture halls of a Buddhist temple compound. It started to be used for the honden at shrines and also in palaces, castles, and folk dwellings later during the Japanese Middle Ages. Its gable is usually right above the moya, or core, while the hip covers the hisashi, a veranda-like aisle surrounding the core on one or more sides.
It is still in wide use in the construction of Buddhist temples and Shinto shrines in Japan. It is also often called moya-zukuri (母屋造). Another variant of Japanese hip-and-gable roof is the Shikorobuki.
South Asia
Kandyan roof of Sri Lanka
In Sri Lanka, a style known as the kandyan roof bears many similarities to the original East Asian hip-and-gable roof. The kandyan roof is primarily used for religious, and historically, royal buildings. Its roots however lie in the traditions of the "Sri Lankan village".

