tips about roof garden design and construction. Water drainage system.

1. Solutions with geosynthetics
Roof
gardens
Green roofs
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2. 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
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3. Roof gardens and green roofs
Roof gardens and green roofs
Advantages 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
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4. Roof Garden with conventional drainage system
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5. Roof garden drainage with geocomposite drains
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6. 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
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7. 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
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8. Enkadrain for green roofs
Plant Material
Drainage
Growth Medium in accorance
with
Pre-Vegetated Mat DIN 4095
Water Retention Layer
Drain & Filter Layer
Root Barrier
Roof Membrane
Substrate
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9. Roof gardens and green roofs
Another possible detail Standard solution for a new
roof (insulation under the
waterproofing):
1
1. vegetation
2 2. substrate
3. Enkadrain (composite
3 drainage product
4 4. waterproof liner
5 (root-resistant )
6 5. thermal insulation
7 6. vapor barrier
7. roof
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10. 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.
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