Drainage membrane

Drainage membrane
The Drainage membrane efficiently solves the problems with moisture and mold and increases the comfort in the buildings.

The strong and flexible dimples of the Drainage membrane resist against the mechanical impacts caused by the back filling of the ground avoiding any kind of damage on the surface of the waterproofing layer. The air gapcreated by the dimples of Drainage membrane between the ground and building parts like basement walls or floors is ideal for all kinds of drainage.

The dimples of Drainage membrane resist against compressions even higher than 180kNm² keeping continuously an air gap of 5,3l/m² between the walls or floors of the building and itself. This space is big enough for the drainage of the rain or ground water, as well as for the evaporation of humidity if supported with a suitable system of ventilation.


Flexible plastic HDPE membrane for waterproofing Type V IN COMPLIANCE WITH EN 13967


Length EN 1848-2 m 20 ± 5%
Width EN 1848-2 m 2±10%
Width EN 1848-2 m 2±10%
Thickness EN 1849-2 mm 0,35 ± 15%
Mass EN 1849-2 g/m2 400 ± 5%
Visible defects EN 1850-2 Visible defects No visible defects
Water tightness to liquid water EN 1928 Pass Pass
Resistance to static loading EN 12730 kg ≥ 20kg
Impact test EN 12691 mm NPD

Tensile properties:

- Maximum tensile force

- Elongation

EN 12311-2 N/50 %


≥ 75 md , ≥ 80 cmd

≥ 30 md , ≥ 40 cmd

Durability of watertightness against artificial ageing

EN 1296 and EN 1928 -


Durability of watertightness exposure to chemicals

EN 1296 and EN 1928 -


Resistance to tear (nail shank)

EN 12310-1 N

≥ 250 md , ≥ 250 cmd

Bitumen compatibility

EN 1548 and EN 1928 Pass


Joint strength

EN 12317-2 N/50


Resistance to deformation under load

Annex B EN 13967 or EN 25619 kN/m2

≥ 155

Reaction to fire

Classes in accordance with EN 13501-5  


Dangerous substances

Dangerous substances -


Protection of basement walls and foundations

The underground parts of buildings must be protected against damp and ground water and this is necessary for a comfortable and also safety reasons. When rust affects the reinforcement of the concrete the structure system is also damaged and this can be dangerous for the stability of the building especially in critical situations like earthquakes. Therefore, foundations and basements have to be waterproofed. Moreover, the waterproofing materials are very sensitive. If not properly protected, they are under the risk of being damaged during the backfilling of the building site. Drainage membrane’s tough but flexible body absorbs mechanical impacts of ground parts like stones and gravel and prevents any such damage on the waterproofing layer even if they might hit the wall. During the life-time of the building Drainage membrane continues to protect the underground walls also against the attacks of roots and most chemicals which might be harmful for underground building parts.

Internal repair of wall damages caused by dump and humidity

If basements are not correctly waterproofed from outside, the walls get mouldy and the damage of the humidity cannot be repaired by repainting or plastering from inside. If drainage membrane is applied together with a new layer of plaster or gypsum board,the final surface of the wall remains clean and smooth.

Internal repair of floor damages caused by dump and humidity

Mould is a problem also for ground slabs. If no waterproofing is made during the construction period, damages and deformations appear on finishing layers of ground slabs caused by humidity. Drainage membrane is the ideal material for the internal damp-proofing of floors, because it can resist not only against humidity but also against vertical loads, as Drainage membrane’s 8mm high dimples do not squash down. So, a continuous air gap is provided between the existing and the new floor, which can be also ventilated at wall flashings.

Protection from ground slabs against humidity coming from the ground

Even if concrete slabs for open areas are coated with materials like asphalt, they have to be protected against the humidity coming from the ground. The dump-proofing layer must be also resistant against impacts, compression and tearing otherwise it can easily be damaged during the construction works for the application of the ground slab.

Drainage membrane is made of HDPE for whom we know that 85% of its contents can be recycled. Chemicaly is inert, so there is no product or compounds that can activate it and make any reactions.

After it’s set, the Drainage membrane provides:

Declaration for operating indicators

Download the pricelist

Изтеглете брошура

Select category