DELTA®-TERRAXX ULTRA: Heavy-Duty Drainage Membrane

Advantages

• High-pressure protection and drainage sheet

  Suitable for horizontal and vertical use, and protects against backwater, perched water and seepage water in high-load applications.

• Higher drainage capacity than mineral layers

  The 10 mm dimple structure drains water more effectively than a 20–30 cm mineral drainage layer and helps protect paving and slabs from frost damage.

• Tested 100-year durability

  Made without recycled material and tested for ageing resistance per DIN EN 13252 by accredited institutes.

• Balanced dimple structure and weight

  Reaches a drainage capacity of 2.43 l/s·m even at 20 m installation depth.

• Fast installation

  Rolls measure 10.5 x 2.40 m, covering 25.2 m² per roll, and can be cut with a cutter knife for detailing.

• Impact noise reduction

  Tests per DIN EN ISO 10140 at RheinMain University confirmed a reduction of up to 32 dB when installed under the paving or gravel bed.

• Integrated adhesive edge

  A self-adhesive, smooth overlapping edge joins strips easily and keeps grit and sand away from the waterproofing.

• Even load distribution

  About 80% contact area with the substrate protects the waterproofing from point loads.

• Clog prevention

  The laminated geotextile, with a 75 μm opening size, keeps the dimple structure from clogging.

• Standards compliance

  Meets DIN 4095, DIN 18531 and DIN 18533, certified to DIN EN 13252, and CE-marked.

Product Data

Material of the dimpled sheet

High density polyethylene (PE-HD)

Material of the geotextile

Polypropylene (GRK 4)

Dimple height

approx. 10 mm

Air gap

approx. 7.9 l/m²

Service temperature range

from -30 °C to +80 °C

Application

In drainage systems for drainage (D) and filters (F), as a protective layer for the waterproofing to DIN 18531 and 18533

Compressive strength

approx. 750 kN/m² (EN ISO 25619-2)

Tensile strength

MD 30.9 kN/m, CMD 30.6 kN/m (EN ISO 10319)

Dynamic perforation resistance

22 mm (EN ISO 13433)

Characteristic opening size

75 μm (EN ISO 12956)

Water permeability

0.0012 m/s (EN ISO 11058)

Water flow capacity in the plane (EN ISO 12958)

3.00 l/m·s at 20 kPa (gradient i = 1.0); 0.35 l/m·s at 20 kPa (i = 0.02); 0.85 l/m·s at 20 kPa (i = 0.1)

Resistance to weathering

To be covered within two weeks after installation (EN 12224)

Dimensions

10.5 m x 2.40 m

Values are typical. Check the current Dörken data sheet before specifying.

Frequently Asked Questions