Roofing membranes Dimpled sheets, drainage & water storage

DELTA®-TERRAXX: Drainage Membrane for Green Roofs and Terraces

Name: DELTA®-TERRAXX
Brand: DELTA®

DELTA®-TERRAXX is a high-performance protection and drainage system: a compression-resistant HDPE dimpled sheet with a laminated, filter-stable geotextile. It protects the waterproofing below and drains water away, on horizontal and vertical surfaces.

Use it under gravel-ballasted flat roofs, extensive and intensive green roofs, walkable terraces and areas driven on by cars, and on basement walls down to 10 m. It also works as a drainage layer for radon and methane. The 0.75 m strips with a self-adhesive edge are ideal for paths, bases and retaining walls.

Supplied in Ireland by Commons House Design, the official Dörken DELTA® partner in Ireland, with a showroom in Athy, Co Kildare.

Dimple height: approx. 10 mm
Compressive strength: approx. 400 kN/m²

Interested in DELTA®-TERRAXX?

Ask us about the right build-up, quantities, availability and delivery for your project.

Enquire about this product Call +353 46 957 0021

Advantages

Universal protection and drainage
One membrane suits both vertical and horizontal applications and protects against backwater, perched water and seepage water.
Higher drainage capacity than mineral layers
The dimple structure drains water more effectively than a 20 to 30 cm mineral drainage layer and protects paving from frost damage.
Long-term durability
Tested durability of up to 100 years, made without recycled material per DIN EN 13252, with ageing-resistance testing by independent, accredited institutes.
Optimised dimpled sheet
The 10 mm dimple height balances compressive strength, drainage performance and handling, with a drainage capacity of 2.51 l/s·m even at 10 m installation depth.
Fast on large areas, simple on details
Roll format of 12.5 x 2.40 m covers about 30 m² in one step and can be trimmed with a cutter knife.
Impact sound reduction
Up to 32 dB reduction in tests based on DIN EN ISO 10140, confirmed by RheinMain University of Applied Sciences.
Integrated self-adhesive edge
A smooth overlap with an adhesive zone joins strips easily, keeps backfill out and improves stability.
Even load distribution
About 80% contact area with the surface protects the waterproofing from point loads from fill material.
No silting of the dimples
The laminated geotextile, with a 140 μm opening size, is filter-stable and keeps the dimpled sheet clear.
Standards conformity
CE-marked per EN 13252 and meets DIN 4095, DIN 18531 and DIN 18533.

Where to Use

Used on flat roofs with heavy gravel surface protection, under extensive and intensive green roofs, under walkable surfaces with or without a base or levelling course, under car-accessible surfaces, in vertical applications up to 10 m installation depth, and for methane and radon gas drainage. 75 cm wide strips are available for paths, bases, retaining walls and connections.

Product Data

Material of the dimpled sheet: High density polyethylene (PE-HD)
Material of the geotextile: Polypropylene
Height of dimples: 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. 400 kN/m² (EN ISO 25619-2)
Tensile strength: MD 15.7 kN/m, CMD 14.9 kN/m (EN ISO 10319)
Dynamic perforation resistance: 35 mm (EN ISO 13433)
Characteristic opening size: 140 μm (EN ISO 12956)
Water permeability: 0.07 m/s (EN ISO 11058)
Water flow capacity in the plane (EN ISO 12958): 3.17 l/m·s at 20 kPa (gradient i = 1.0); 0.32 l/m·s at 20 kPa (i = 0.02); 0.42 l/m·s at 20 kPa (i = 0.03); 0.84 l/m·s at 20 kPa (i = 0.1)
Resistance to weathering: To be covered within two weeks after installation (EN 12224)
Dimensions: 12.5 m x 2.40 m, 12.5 m x 0.75 m
Long-term resistance: 100 years, according to EN 13438

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

Frequently Asked Questions

What is DELTA®-TERRAXX used for?

What sizes does DELTA®-TERRAXX come in?

Dimensions: 12.5 m x 2.40 m, 12.5 m x 0.75 m.

Which accessories work with DELTA®-TERRAXX?

DELTA®-BEFESTIGUNGSSCHRAUBE, DELTA®-TERRAXX PROFIL, DELTA®-GEOTEXX FS 100. Ask us and we will put together the full system for your project.

Where can I find the DELTA®-TERRAXX data sheet?

You can download the available documents in the Downloads section of this page.

Do you supply DELTA®-TERRAXX in Ireland?

Yes. Commons House Design is the official Dörken DELTA® partner in Ireland. Contact us for availability, quantities and delivery, or visit our showroom in Athy, Co Kildare.