A New Kind of Roof Greening System in China

With the wider use of green roofs, new technology and new materials are being applied to the field of building roof greening for buildings. This paper introduces BRGS (built- up roof greening system), a new type of roof greening system that differs from roof greening systems currently used in China in that it integrates a main and an auxiliary water storage capacity into the roof greening system. Compared to other systems currently in use, BRGS offers a simpler, quicker, less labor intensive construction process; lighter floor load; and lower long term maintenance requirements and costs. It also makes full use of rainwater and snowmelt, which provides a significant amount of water to plants. This paper also introduces a planting experiment, the results of which indicate that plants during their early stages of growth tolerate an alkaline environment, and that after a period of time, the pH value level of water stored in BRGS approaches 8.3, so we can conclude that BRGS is suitable for construction engineering.