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Green roof introduction

In the city, the roof can be said to be the least developed and utilized space. It is this idle space that provides the city with the power to achieve sustainable development.The 'green roof' after greening the roof not only has the effect of heat insulation and cooling, but also has the functions of urban beautification, air purification, carbon emission reduction, rainwater retention, etc. In addition to green belts and parks, it can be created everywhere. 'The lungs of small cities' make the city's living environment better.

Green roof function

Besides building a green roof, is there any other way to insulate and cool the roof?

A small landscape garden can be set up on the top floor.A layer of drainage board is laid on top of the concrete roof as the base, and then landscape materials such as white pebbles, permeable bricks, and artificial wooden floors are laid on top of the drainage board.Drainage slabs and pebbles placed above the concrete roof can isolate the air layer from the roof and prevent the sun's heat energy from being transmitted to the concrete roof.This will not only help to block heat energy and help the roof dissipate heat, but also create a beautiful roof garden.

Green roof construction

Before installing a green roof (thin-layer greening), you must first make sure that there is no problem with the waterproof layer. Green roofs can add a layer of protection to the waterproof layer of the roof so that the sun will not directly shine on the waterproof layer.Ultraviolet rays will embrittle the waterproof layer made of petrochemical materials. The planting layer and the soil layer can slow down temperature changes and avoid excessive temperature differences between day and night, which will cause thermal expansion and contraction of the waterproof layer to cause cracks.According to foreign experience, green roofs not only do not cause water leakage, but can greatly extend the life of the waterproof layer.

1. Cement: roof and floor structure

2. Waterproofing: Prevent rainwater and irrigation water from penetrating into the isolation layer of the floor structure.

3. Root-blocking layer: Use root-blocking boards to prevent plant root acid from destroying the waterproof layer.

4. Drainage layer: Use a drainage board installed above the waterproof layer and root blocking layer. The drainage board can separate the air layer to facilitate the rapid passage of moisture.(Water storage and drainage boards can store a small amount of water to help plant growth)

5. Filter layer: Plant-based non-woven fabric is used as a filter material between the soil and the drainage board. The plant-based non-woven fabric (polyester fiber) can effectively allow water to penetrate under the drainage board, and can also prevent the loss of soil media, achieving rapid drainage and water filtration effects. to prevent the drainage holes from being blocked.

6. Covering soil: Pay attention to the load-bearing problem and choose light soil with good ventilation and drainage and low specific gravity.Its light weight and good drainage can avoid balcony drainage blockage in the future.The covering depth of 20~40cm is suitable for herbs and small shrubs.(The depth of covering soil varies according to the type of planting)