How to build modern roof garden
April 3, 2010
Before making a rooftop garden, consider first the roof of the building construction. Is it designed to support the burden of growing media such as land and trees will be planted on it or not. The reason, park on the roof (roof garden) should be supported structure and strong roof construction. The existence of the park on the roof (roof garden) will lead to increased load. Embankment soil and the plants will increase the dead load, wind load, and the additional burden of water on the roof of the building.
The building must have a drainage system to function properly. If the clump of plants will be planted, he calculating roof load will increase approximately 650 kg/m2. Plus more for living expenses based on activities at the roof garden. For example, 400 kg/m2 for sports, 500 kg/m2 to party and dance, and 250 kg/m2 for restaurants. To plant a large tree, the location of the floor slab should be supported by structural columns so that the concrete slab does not collapse. In addition, the retaining wall needed to be made because the trees require adequate soil thickness, or make a hole in the roof of the building, beneath a tree. Prone to leakage of roof construction, so it must be equipped with drainage channels. Drainage layer such as gravel, sand and pumice easily be added to prevent water flowing into the drain hole. Filters are made of palm fiber geo-textile or function to drain the water below but retains soil grains so as not to clog a landfill.
To prevent damage to the impermeable layer (water proof layer), the anchoring layer must be increased so that plant roots do not damage the waterproof coating and the concrete underneath.
Because the plants on the roof exposed to direct sunlight and wind are much faster, watering should be done periodically. So it needs water spraying can be done manually or automatically. For growing media, the formula needs to be lighter but have the ability to provide nutrients and moisture. For example, by mixing the sand with wood shavings plus a layer of pine bark and manure. The depth of planting medium for grass requires 20 to 30 centimeters, as well as cover crops. Meanwhile, shrubs and small trees require a depth of 60-105 centimeters. Large trees to a depth of nearly 2 meters.
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