Water storage membrane DELTA^®-FLORAXX TOP

Diffusion-open protective and drainage membrane with water storage function and equipped with an integrated, filter-stable geotextile. Surface drainage and water storage in one. Ideally suited for use on green as well as on inverted roofs.

The dimpled membrane is safe for drinking water, resistant to chemicals and does not rot in the ground.

01 /06

DELTA®-FLORAXX TOP water storage membrane

The geotextile may be turned back by approx. 10 cm at both membrane edges. In this manner, the 1 or 2 knob rows can be laid well-covered while the overlap may be safely covered again with the filter fleece.

Punched perforation holes = DELTA^®-FLORAXX TOP is diffusion-open with an SD value of approx. 0.4 m permitting the draining of the excess rainwater onto the sealing layer.

DELTA®-FLORAXX TOP Anwendung unter Intensivbegrünung

Advantages

Large water reservoir of approximately 7 l/sqm
DELTA^®-FLORAXX TOP stores rainwater. This is why it serves as a water reservoir for dry periods. Excess rainwater runs off through the perforation holes punched in the dimpled sheet and can be drained on the roof waterproofing between the knobs.
80% higher compressive strength
Thanks to the octagon knob with reinforcing ribs, it has an approx. 80% higher compressive strength than standard nubs.
Integrated filter fleece
The laminated, filter-stable geotextile permits the application of the plant substrate immediately after the drainage and after the application of the water storage layer. No further filter layer must be applied. This saves additional effort.
No silting up
The laminated geotextile is pressure and filter stable. This way it can reliably prevents the dimpled sheet from becoming silted up.
Perforation holes between the dimples
The perforation holes guarantee that excess rainwater (approximately 8.7 l/m²s) is drained away, thus avoiding root rot, for example.
Vapour-permeable
Thanks to the perforation holes, the product DELTA^®-FLORAXX TOP can achieve an SD value of approximately 0.4 m. So, it is ideal for the use on inverted roofs.

Application

DELTA^®-FLORAXX TOP serves as a protective, drainage and water storage layer in extensive as well as intensively greened flat roof constructions. The dimpled sheet is rolled out on a protective fleece (min. 300g/sqm) above the root-proof seal with the dimpled side down. Since the filter-stable geotextile has already been integrated, the plant substrate can be applied directly to the product DELTA^®-FLORAXX TOP during the next step. The planting is then done individually.

DELTA^®-FLORAXX TOP is also used in the inverted roof as a diffusion-open cover for the thermal insulation. The dimpled sheet is laid on a water-draining separating layer with the knobs facing the roof insulation. After that, the required fill (plant substrate, chippings, gravel, crushed stone, etc.) will be applied directly to the DELTA^®-FLORAXX TOP. Even in the inverted roof, greening, the creation of terrace areas or simple gravel is possible without any problems.

Reference

DELTA^®

SKY PARK
Bratislava, SK

The SKY PARK project in Bratislava impresses with its connection with its wider area. The solutions by DÖRKEN were used on the most striking elements of the whole project - on the facades as well as in the green areas.

DELTA^®

Film Centre
Gdynia, PL

The Gdynia Film Center was awarded "Building of the Year 2015" in Poland. But during the new construction, potential problems with slope water due to the neighboring city hill had to be taken into account. Find out here which DÖRKEN solution was used for this.

DELTA^®

Patio Ząbki
Warsaw, PL

The apartment buildings near Warsaw open up special views of the greened and paved courtyard. DELTA^®-FLORAXX TOP was used under the intensive greening of this underground parking deck. Learn more here!

Technical data

Material of the dimpled sheet	Dimple membrane perforated with laminated PP geotextile
Dimple height	approx. 20 mm
Compressive strength	approx. 200 kN/m² (EN ISO 25619-2)
Air gap	approx. 14 l/m²
Servicetemperature range	from -30 °C to + 80 °C
Water flow capacity in the plane	approx. 10 x 10-3 m²/s (10 l/s · m) (EN ISO 12958)
Water permeability with vertical inflow	ca. 8,5 l/m² · s
Perforation diameter	ca. 6,5 mm
Water storage capacity	ca. 7 l/m²
Characteristic opening size geotextile	ca. 0,15 mm (EN ISO 12956)
Water permeability geotextil	ca. 0,08 m/s (EN ISO 11058)
Water drainage capacity	1,17 l/m · s at 20 kPA (Gradient i=0,02)
	1,43 l/m · s at 20 kPA (Gradient i=0,03)
	2,64 l/m · s at 20 kPA (Gradient i=0,1)
CE conformity	DIN EN 13252, test report TBU1.1/13525/0580.0.1-2009
Roll size	10 m x 2 m, fleece width 2,10 m