Roof Greening Installation
2015-08-11
A. Construction Principle
Roof greening should be safe, aesthetics and no leakage. Construction should be based on the principles and after confirmation from the gardening department.
B. Preparation Before Construction
1. Measure the maximal weight limitation of the roof, and roof condition of the roof slop, leakage, drainage;
2. Roof weight design analysis
- Measure the weight of the plants, size, quantity and earth
- Analysis the thickness and weight of the water drainage layer
- Design department designs the roof according to the weight design analysis to ensure the safety
C. Material Preparation
1. Plants: Prepare the plant quantity according to the design
2. Construction material preparation. Prepare the waterproof layer, water drainage pipe, plastic drainage plate and other materials for other designs.
D. Installation Methods
1. Roof Water Proof
- If the original roof is precast hollow slab, use linoleum, asphalt pour 3 layers, use glass waterproof agent brushing or doing fiberglass mat to prevent leakage
- The thickness of waterproof layer is generally 50 to 100mm
- The roof pitches processing into natural drainage
2. Mark the spaces of the flower beds, the location of the flower, roads, drainage channels, irrigation and drainage facilities on the roof in accordance with the design requirements.
3. Building Construction:
Construction building planting beds and garden ornaments according to the design
4. Installation of Irrigation and Drainage Systems:
- Irrigation usually use those are able to low pressure irrigation, colorful catheter, light spray device, nozzle configuration should be uniform, so that every corner can be irrigated
- Drainage complete unobstructed
- Flower beds, road must leave the water hole and even as a whole with the parapet drainage holes or roof gutter so that rain and irritation can drain away, in a timely manner to reduce the roof load and prevent leakage
E. Lay the drainage layer and filter layer
- Lay the plastic drainage sheet on the roof surface
- Lay the non-woven fabric
- Lay the roof resistance layer to prevent the plant's root from destroying, and prevent the lightweight soil particles under the leak, clogged drains
F. Lay Planting layer
Lay earth in accordance with the needs of the design and plant plants planting soil. The lightweight material used pearl salt, vermiculite, saw sawdust, waste cotton seed hulls, cinder ash(sawn cut, waste cotton seed hulls must be approved by a certain percentage and soil rot heat after fermentation stirring.)
G. Plant Cultivation
1. Plant cultivation should be descending gradually from the inside to the outside.
2. In configuration design, small trees, shrubs planted points should be in the load-bearing column
H. Conservation and Management
1. Water: In order to meet the needs of plant growth, green roof must be watered frequently. Watering or sprinkler irrigation, drip irrigation on times in the 1st summer. Spring and autumn should be the 1st poured more than 2 times the water;
2. Fertilization: Perennials need to be constantly replenished soil fertilizer, usually used to spend or preparation of the nutrient solution, appropriate facilities into organic fertilizer;
3. After a certain period of plant cultivation, add artificial soil to keep planting soil thickness at its discretion, to create the conditions for the normal growth of the plant;
4. Uprooting weeds regularly, the flower beds should be kept cleaned.
5. Green roof plants is very vulnerable to damage by frost in winter. The planting pants can be wrapped around the dry film covering cold protection basin (cylinder) and moved into the greenhouse to over the winter.
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