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Drainage Sheet with Geotextile Filter Fabric:
is a protection and drainage system for compression-resistant surfaces.
is a two-way dimpled sheet made from special high-density PE with a fused-on PP geotextile. A compact system that may be applied quickly straight from the roll.
is made exclusively of branded polyethylene. Containing no recycled material, it is itself fully recyclable.
resists degradation in soil and is non-polluting for drinking water.
forms a system of ventilation ducts between the foundation wall and the dimples which keeps the wall dry and provides additional heat insulation.
features a drainage capacity that can handle twice the maximum amount of water that is likely to occur under unfavourable soil conditions.
is highly compression-resistant.
Benefits:
2 layers - one complete system:
Layer 1: The two-way dimpled sheet. Featuring dimples on both sides, it offers two advantages: On the one hand, the dimples between the foundation wall and the sheet create a system of ventilation ducts which keeps the foundation wall permanently dry. On the other hand, the dimples that point towards the surrounding soil provide drainage across the entire surface.
Layer 2: The compression-resistant permanent geotextile made of PP. Laminated on to the dimpled sheet, the layer of rot-proof geotextile out fine-grained soil particles, thus protecting the system of ducts formed by the dimples from being clogged up by sludge. This permits water to flow unhindered downwards to the perforated drainage pipe.
Installation
instructions:
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Installed either vertically or horizontally.
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Held in place by either taping, nailing,
gluing or simply overhanging over the wall while backfilling takes place.
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Installed with the geotextile facing the
backfill.
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Joined by simply butting edge to edge and
overlapping the geotextile overhang and securing with reinforced canvas tape.
Alternatively overlap the cuspate core by 50mm and secure geotextile as
previous.
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Backfill with free draining fill taking care
not to disturb or damage the drainage sheet.
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HDPE core properties
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Units
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10mm
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Geotextile Properties
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Compressive strength
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kN/m2
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528
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Flow
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>200 i/m2/s
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Mm
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10.0
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CBR
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>1500 N
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Thickness
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i/min/m width
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223
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EOS
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<0.12 mm
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Roll length
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m
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12.5
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Grab
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>500 N
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Roll width
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m
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1.22
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Roll weight
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Kg
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18
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Material
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High density polyethylene
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Weight
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approx. 775 g/m2
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Sheet thickness
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approx. 0.6 mm
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Dimple height
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8 mm
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Void volume between studs
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approx. 5.3 L/m2
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Discharge Capacity
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approx. 4.6 Ls.m
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Geotextile weight
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136 g/m2
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Geotextile water transmission
Resistance
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approx. 100 L/s.m2
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Compressive strength
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approx. 250 kN/m2 (25 t/m2)
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Service temperature
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-30 oC to 80 oC
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Biological / chemical resistance
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Resistant to ground chemicals, rot, mould, algae,
bacteria and root penetration.
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Roll Size
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2.0m x 20m
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