Abstract
The traditional wooden architectures and the roofs of kaya are decreasing year by year in Japan. It is necessary to keeped the long-term durability of the roof. Although the examinations that could be evaluate the effectiveness of water fluidity inclines of the kaya materials in the roof is not done well. In this study, the kaya roof body was constructed and the experiments for evaluating the early drying conditions after watering of the rain was enforced. As the results of experiments, it was cleard that it becomes effective measures for preserving the kaya material for long terms by holding the kaya so as to increase the incline to the roof and become ease drying these materials.
