DELTA® protects property.
Saves energy. Creates comfort.
Dörken GmbH & Co. KG
Wetterstraße 58
D-58313 Herdecke
Tel.: +49 23 30/63-0
Fax: +49 23 30/63-355
bvf@doerken.de
© Dörken GmbH & Co. KG.
A Dörken Group Company
Efficient and EconomicalThe Delta Terraxx foundation protection and drainage sheet offers a number of important advantages to planners and users in horizontal drainage applications. Its low add-on height and weight eliminate planning handicaps. Its outstanding drainage capacity and economical installation make this sheet an efficient and economical alternative to traditional mineral coverings.
At the BAU 2007 exhibition in Munich, Dörken GmbH & Co. KG presented its Delta-Terraxx foundation protection and drainage sheet in a special application as a horizontal drainage layer under public spaces on flat roofs and ceilings. In this application, the two-ply sandwich sheet combines only a few centimetres of add-on height with an outstanding drainage capacity which, given a low static load, markedly exceeds that of a classic gravel or chipping cover. Laid out straight from the roll as a protection and separation layer on top of the waterproofing, it offers a high degree of protection from mechanical loads. Thanks to its permanent filtration capability and its high compression resistance of 400kN/m², the material guarantees long-term protection and drainage.
Large flat roofs and ceilings covering underground parking lots and buildings are ideal for use as roadways, playgrounds, or leisure areas as well as for creating extra parking space. When partially or entirely planted with a herbaceous covering, such areas may improve the microclimate in residential areas to a marked extent. In such cases, however, any water delivered by precipitation or building run-off must be conducted away safely both at the surface and in the waterproofing layer below, and a high-performance drainage layer is needed even within these structures. Otherwise, stagnant water might destabilize the subgrade of traffic areas, plants might be damaged when their soil becomes waterlogged, and the whole might constitute an additional burden on the waterproofing system itself. Conventional mineral drainage systems consisting of gravel or chippings will meets these requirements only at great expense. Not only is there a danger of such structures becoming clogged up by sludge and gradually losing their drainage capability in consequence, the requisite minimum thickness of such a layer constitutes a handicap for planners and a static cost factor that must be taken into account.
Delta-Terraxx, an extremely robust protection and drainage system, has been optimised for different applications in horizontal drainage. Consisting of a dimpled sheet with a fused-on geotextile, the composite material forms a highly effective drainage layer: Facing up, the geotextile acts as a filter protecting the air gap created by the dimpled sheet underneath. Under a covering of gravel, chippings, or soil, the heat-bonded permanent-filtration geotextile keeps the dimple structure from being clogged up by sludge, thus ensuring that any excess water is drained away completely and freely. Its integrated self-sealing edge makes the dimpled sheet easy to lay out and helps to prevent root penetration. The smooth backing of the material ensures that any impinging loads are distributed evenly across the waterproofing surface. Thus, Delta-Terraxx makes it safe for workers to walk on any compression-resistant waterproofing during the construction phase, at the same time protecting the waterproofing layer from mechanical damage and harmful exposure to heat.
