Due to the diverse designs of buildings, there are various roofs with different sizes, heights and shapes, as well as novel and changeable layout designs, as well as various plant materials and ancillary facilities. Used to form various types of roof greening. Roof gardens are divided into two types according to height: low-rise building roof gardens and high-rise building roof gardens; according to spatial organization, they can be divided into three types: open, closed and semi-closed; no matter which type of roof garden, its design techniques are the same as those on the ground. The courtyard is much the same. From the perspective of use functions, it can be divided into several main types such as flower nursery type, scaffolding type, courtyard type, lawn carpet type, three-dimensional multi-layer type, garden type, and economic development type. At present, there are three main methods of roof greening:
The first one is for lightweight roofs with weak bearing capacity and no greening design in advance, using carpet greening with intensive planting of grass species suitable for the growth of a small amount of planting soil. Carpet greening Plant various types of ground cover plants for greening, and the effect will be better if patterned. For example, the Shanghai Academy of Agricultural Sciences successfully researched the "one-time roof greening technology" suitable for light flat roof greening. This technology has obtained a national intellectual property patent and passed the Shanghai High-tech Transformation Project Certification. It has been used in Shanghai and Beijing Each has an application area of ??more than 50,000 square meters, making it the largest promotion project for rooftop greening areas in Shanghai and Beijing. This technology uses Sedum sedum, which has the characteristics of succulent, short stature, creeping growth, branches on nodes, self-propagation, extremely drought-resistant and cold-resistant and barren, the green color fades in winter but does not die, and turns green again in spring, saving water. , save labor and require almost no management. The lawn blocks cultivated at the base with 2 to 3cm thick matrix material can be laid on the roof at one time to form a flat surface. Compared with roof treatment methods such as painting, paving plastic boards (mats), flat to slope and other roof management methods, the cost is lower. Experts and the media call this sedum plant the best plant for roof greening at present. The second is to plant garden-style greening of trees and shrubs on roofs with strong load-bearing capacity. This method is suitable for larger roofs and is mostly used in high-end hotels, guesthouses and high-rise buildings. It makes the roof space more varied and creates rich, hierarchical roofs. Colorful effect, such as a rooftop garden on the east side of Hangzhou Wulin Square, which is built on the roof of two three-story buildings connected by arch bridges. It is as big as a football field. There are more than 50 kinds of flowers and trees planted in the garden. It is like spring all year round. It is a residential building several stories high. As long as the residents open the doors and windows, they feel like they are in a garden. The third is combined type, that is, roof greening that is freely placed and mainly arranged in potted pots at the four corners of the roof and along the load-bearing walls. This method is more flexible. Which method to choose depends on the load capacity of the roof, the location of the load-bearing wall, the flow of people, the surrounding environment, the use, etc. Scaffold greening is used to grow vines, such as grapes, kiwis, etc., because the cultivation substrate and scaffolding columns can be placed centrally on the load-bearing wall, so the load on the scaffolding and plants is small. This greening method imposes a small load on the roof and can be withstood by general roof structures. It is especially suitable for the roofs of low podiums in front of high-rise buildings. Flower nursery type: sweet potatoes, peppers and flowers are planted on the roofs of some buildings in Chongqing; some rooftops in Chengdu not only grow flowers, but also build nurseries, medicine gardens and melon gardens. Their roof greening area has exceeded 100,000 square meters, and the number of roof gardens has reached dozens. Hundreds of seats, with the larger garden covering an area of ??2,000 square meters.
The above is collected and compiled by Zhongda Consulting
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