Powder coating has not yet been popularized in the present Japanese buildings. However, it has been popularized in overseas and over 10 years has been already passed from building completion. Durability of building materials has to be discussed in order to popularize in the Japanese construction industry field. Therefore, investigation into the actual conditions in overseas buildings has been executed. In this paper, the data is analyzed and the durability is discussed. A main fruit of analysis is as follows. Chalking rate and gloss retention depend on the meteorological and the coating factors. And also, the powder coating durability in the Japanese building exterior is estimated.%粉体塗装はVOC（揮発性有機化合物）を排出しないため環境負荷が少なく、近年日本の建築分野においても溶剤系塗装の代替として注目が集まっている。しかしながら、日本国内における建築工事では、数年前から内装への採用は見られるが、外装に適用されるケースは未だ限られているのが現状である。
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