The aim of this study is thermal environment mitigation effect in summer by sheet planting on metallic roof of factories or similar buildings to use Zoysia, Sedum and Lippia as test plant. We compared surface temperature of planted roof to bare metallic roof. The analysis period was from Jul 1st to Sept 5th in 2008, and we picked up 24 days which were maximum temperature over 30 degrees C and hours of sunlight was over 6 hours. As a result, the surface of bare metallic roof had 2 days with temperature over 80ºC, but Zoysia area had 7 days with over 50ºC, Sedum area had 6 days with temperature over 40ºC. And Lippia area has 6 days with temperature over 40ºC. The surface of bare metallic roof was maximum temperature date 83.9ºC. The surface of the Zoysia area was maximum temperature date 52.6ºC, The surface of the Lippia area was maximum temperature 41.9ºC, The surface of the Sedum area was maximum temperature 41.1ºC in daytime. Therefore the planted was effective Zoysia area 31.3ºC, Therefore the planted was effective Lippia area 42.0ºC, therefore the planted was effective Sedum area 42.8ºC. It was seen effected to reduce temperature of surface sheet planting metallic roof. Therefore, the sheet planting on Factories’ metallic roof or similar buildings expected thermal environment mitigation effect.
