Why are the roofs and walls of houses in southern China steep?

Most traditional houses in southern China have high walls and steep roofs. This is because the local temperature is high, there is a lot of precipitation, and the spire is convenient for drainage. However, high walls are beneficial to the rapid drainage and heat dissipation of rainwater. Due to the humid climate in southern China, hot air rises and cold air falls, which is beneficial to gas exchange.

In sharp contrast, it is the northern folk houses. There are many refractory beds in the houses with small roof slope and thick walls in the north. Because there is less rain in the north, the requirement for drainage performance is not high, but the requirement for thermal insulation performance is high. Short houses, thick walls and even fireproof beds are all designed to resist the cold.

By contrast, it is easy to understand the reasons for the steep roofs and high walls in southern China.