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Page 1 of 10www.geosyntheticsworld.com
Solutions with geosynthetics
Roof gardens
Green roofs
Page 2 of 10www.geosyntheticsworld.com
Roof gardens and Green roofs
Two systems- Two purposes• Roof gardens:
• To be used as a garden• with rich vegetation on a thick layer of
soil• requires maintenance
• Green Roofs:• environment-friendly roof with a thin
vegetal cover• not to be used as garden
• low maintenance vegetation (mosses, sedums, herbs) on a thin layer of lightweight substrate
Page 3 of 10www.geosyntheticsworld.com
Roof gardens and green roofs
Roof gardens and green roofsAdvantages of roof gardens & green roofs in general:• pleasant appearance, esthetics• thermal insulation• protection of the liner against UV light and great temperature variations• sound absorption• water absorption (less discharge to sewer system, less tax depending on country)• dust binder
Page 4 of 10www.geosyntheticsworld.com
Roof Garden with conventional drainage system
Page 5 of 10www.geosyntheticsworld.com
Roof garden drainage with geocomposite drains
Page 6 of 10www.geosyntheticsworld.com
Advantages of geocomposite drain sheets
Advantages of Enkadrain specifically• lower construction height and weight than for mineral drain layers• optimal protection of the liner• light weight and flexibility allow easy transport to a roof and easy Installation• Drainage of excess water
Page 7 of 10www.geosyntheticsworld.com
Required discharge capacities
Horizontal applications
To be determined in accordance with local standards and conditions.
As an indication we show the discharge capacity for flat roofs and roof gardens per m2 roof area in accordance with DIN 4095:
Cover Discharge in l/(s.m2)
gravel 0.02-0.03
light weight substrate for green roofs 0.01-0.02
natural fertile soil for roof gardens < 0.01
Page 8 of 10www.geosyntheticsworld.com
Enkadrain for green roofs
Drainage in accorance with DIN 4095
Plant Material
Growth Medium
Pre-Vegetated Mat
Water Retention Layer
Drain & Filter Layer
Root Barrier
Roof Membrane
Substrate
Page 9 of 10www.geosyntheticsworld.com
Roof gardens and green roofs
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Standard solution for a new roof (insulation under the waterproofing):
1. vegetation2. substrate3. Enkadrain (composite drainage product4. waterproof liner (root-resistant )5. thermal insulation6. vapor barrier7. roof
Another possible detail
Page 10 of 10www.geosyntheticsworld.com
The technical data and information set forth in this slideshow reflect our best knowledge at the time of issue. The slideshow is subject to changes pursuant to new developments and findings, and a similar reservation applies to the properties of the products described. We do not undertake any liability for results by usage of these products and information. We do not take any responsibilities. This slideshow is only for general information. Please check with your local conditions, soil, climate, plants and vegetation properties.