This study analyzed indoor and outdoor thermal performance among different types of green roofs and green walls in order to provide information for building greening. When temperature reduction effects of green roofs and green walls were compared to the control, the effects was highest at the green roof and wall treatment, followed by green wall, green roof, and the control, which means there was temperature reduction effects by building greening. Also these temperature reduction effects was influenced by outdoor weather condition such as being typically high in sunny days but not notable in rainy days. In addition temperature reduction was effective as the air temperature was up but was not influenced by wind velocity. As for directions, the west side showed the highest temperature followed by the south and east in the order. Heat flow was found greater in control than in green roof and green wall. In addition, heat flow reversal was found as time went on.

In recently, building greening to improve the urban environment is a very important areas. Thus, in order to promote the building greening is needed for the arrangement of its related system. In this study, analyzed the related system in Japan and the results obtained are as follows. Related system in Japan are to promote the spread of compulsory and dissemination of guidance. And to promote the spread of dissemination of guidance are to allowed a system to be included in green area of the site required, plans to loan the costs of greening, plans to subsidize the cost of greening, tax reduction and exemption, incentive on floor area ratio, plant supply and other technical guidance system. In conclusion, in order to promote the building greening note the related system of Japan and our related system should be arranged.

This study focused on the characteristics of change soil water with respect to soil thickness and soil mixture ratio, in order to effectively carry out an afforestation system for a roof with a low level of management and a light weight. Soil hardness tended to increase as sand particle was increase regardless soil thickness and soil porosity had more higher artificial soil than natural soil mixture. In case of soil pH, natural soil mixture had between 6.7 and 7.4, and artificial soil mixture had 6.0∼6.8. Organic matter, electrical conductance and exchangeable content were highest in L10, which it had the highest leafmold ratio. Soil moisture tension(kPa) in 15cm soil thickness was observed natural soil mixture had a considerable change but artificial soil mixture had a gradual change when non-rainfall kept on. In the experimental L10, S10, S7L3 and S5L5 object, the amount of moisture tended to rapidly decrease. However, in the experimental P7P1L2, P6P2L2, P5P3L2 and P4P4L2 objects, which contained pearlite and peat moss, the amount of moisture tended to gradually decrease. As a result, the use of a artificial soil mixture soil seems to be required for the afforestation of a roof for a low level of management.

본 연구는 도시 내 생태환경을 개선하는데 있어 중요한 역할을 담당하는 옥상녹화에 대한 최근의 한일 옥상녹화 지원제도 및 시공실태를 비교 분석한 결과 다음과 결론은 얻을 수 있었다. 국내 옥상녹화를 더욱 활성화하기 위해서는 녹화시스템 등의 기술개발은 물론 이를 장려할 수 있는 제도의 보완이 중요하다고 판단된다. 특히, 현재 일본에서 시행하고 있는 옥상녹화 관련 공사비의 저금리 융자나 조세감면 혜택, 식물 지원이나 기술지도 등의 방안이 고려될 필요가 있다. 또한 국내 옥상녹화 조성에 있어서도 제도 보완을 통한 보급 확대는 물론 지역차별성을 고려한 옥상녹화 유형의 다양화, 식물 소재의 다변화, 모니터링에 통한 조성 후 평가 및 관리, 전국 단위의 조성 사례 집계 자료 축적 등이 필요하다고 판단된다.