Dimpled sheets, drainage & water storage

DELTA®-NB

An economical dimpled sheet made entirely from recycled material, for blinding layers, foundation wall protection and seepage layers.

Compressive strength: 200 kN/m²
Dimple height: 8 mm
Roll length: 20 m

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Features

Blinding layer substitute
Can often replace a lean-concrete blinding layer, saving excavation, equipment and waiting time.
Smooth overlap edge
Widths over 1.0 m have a dimple-free edge of about 10 cm on one long side, making overlaps simple.
Diagonal dimples
The diagonal pattern lets the sheet bend in a straight line, so corners and edges are neat and quick to form.
Made from recycled material
Produced entirely from recycled raw materials.
Resistant
Resistant to chemicals and roots, rot-proof and safe for drinking water.

Where to Use

Instead of a lean-concrete blinding layer

Roll out dimples-down on the levelled ground. Overlap using the smooth edge, or by 20 cm at end joints. Place linear spacers directly on the sheet (allowing for the required concrete cover), fix the reinforcement and pour.

Foundation wall protection

Acts as backfill protection and separating layer between soil and structure. Lay with the dimples facing the pressure-resistant surface and fix temporarily above the splash zone. After backfilling, cut it off flush at ground level.

Seepage layer

In two-shell construction such as shoring, lay and fix it with the dimples facing the filter surface (for example shotcrete), then pour the concrete directly against it. The cavity behind the dimples drains seepage and groundwater quickly and safely.

Product Data

Material: Special high-density PE, plasticiser-free, fully recyclable
Colour: Anthracite
Dimple height: approx. 8 mm
Compressive strength: approx. 200 kN/m²
Air gap volume: approx. 5.3 l/m²
Service temperature: -30 °C to +80 °C
Dimple contact area: approx. 1,450 cm²/m²
Chemical properties: Resistant to chemicals and roots, rot-proof, safe for drinking water
Roll sizes: 20 m × 0.50 / 1.00 / 1.50 / 2.00 / 2.40 / 3.00 m