Today in Japan, there are so many old public facilities. External Insulation Finishing System (EIFS) have been focused on as the way to improve the performance of saving energy, and several studies of EIFS have been mainly made in cold districts. The purpose of this study is to examine the effectiveness of EIFS as the way of long life repairing for existing facilities. This study is by actual measuring the condition of a school repaired with EIFS and simulation with FEM. The main results are:
1. By EIFS, the thermal condition in summer and winter is improved a little.
2. By EIFS, change of the outside surface temperature is controlled and the difference of surface temperature between outside and inside are also controlled.
3. On the rooftop, EIFS is most effective in terms of control of surface temperature.
4. With FEM, the risk of cracking on the rooftop and walls is reduced by EIFS repairing.
5. On the rooftop without E.I.F.S., thermal stress is over cracking stress.
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