Embossed Drainage and Water Retention Membrane
GEO 20 GARDEN DUO
The Eurovent® GEO 20 GARDEN DUO drainage and water retention membrane is made of high-density polyethylene (HDPE) with a parallel arrangement of 20 mm high dimples and additional perforations. It is integrated with a PP filter geotextile. The dimples retain water, while excess water is drained away.
Advantages:
- drainage for green roofs
- retains up to 6 l/m² of water
- resistant to compression
Application and Technical Data
Eurovent® GEO 20 GARDEN DUO is used as a horizontal layer in inverted roof and roof garden systems, providing effective drainage of excess rainwater during heavy rainfall. At the same time, the high dimples act as water retention reservoirs, helping to store the water required for plant growth.
The integrated filter geotextile layer prevents soil particles from entering the spaces between the dimples, ensuring efficient and long-lasting operation of the drainage system.
Fotos
System products
For maximum performance, Eurovent® GEO GARDEN DUO should be used in combination with:
- Eurovent® filtration geotextiles, which protect the drainage and water retention layer against clogging and allow unrestricted water flow,
- Eurovent® garden and surface drainage systems, which drain excess water and work together with the membrane to create stable water retention layers,
- sub-base layers and landscaping aggregates, which, when combined with GEO GARDEN DUO, increase substrate stability beneath paths, terraces and recreational areas,
- Eurovent® vertical and horizontal waterproofing systems, when the membrane is used adjacent to buildings, additionally protecting the structure against moisture and mechanical damage.
GOOD TO KNOW
How does GEO 20 GARDEN DUO differ from GEO 20 GARDEN?
The DUO version has a factory-integrated PP filter fleece. It limits the entry of fine substrate particles into the drainage space.
How much water can GEO 20 GARDEN DUO store?
According to current product data, the studs provide retention of up to approximately 6 l/m². Actual water management depends on the complete green-roof build-up.
Does the integrated fleece mean no other geotextile is needed?
Not always. Additional filter or separation layers may be required elsewhere in the system, in accordance with the design.
Is GEO 20 GARDEN DUO waterproofing?
No. It is a perforated drainage and water-retention layer with a filter and does not replace roof waterproofing.
What are the perforations for?
They allow excess water to flow through and drain away once the water-retention spaces are filled.
