Profiled geomembranes: what is


Profiled geomembranes - a sheet of HDPE polyethylene with a protruding profile of 1 to 30 mm (depending on the modification). Produced with bonded geotextile, and without. The main difference between profiled membranes is the compressive strength (the weight that the membrane can withstand, while maintaining the declared draining capacity), and the presence of geotextiles. Profiled membranes can be produced with different contents of primary raw materials. Domestic membranes (Platter (Technonikol), Villadeyn (Ikopal), Tefond (Tegola), Izustud (Tegol)) are produced only from recyclables. Imported profiled membranes (Delta Dorken, IsoDrain) are made from raw materials containing not less than 50% of primary, Delta is produced on 100% of primary raw materials. The high content of primary raw materials determines the uniformity of the strength of the material, as well as protection against UV stabilization.

Fields of application of profiled geomembranes

The use of profiled membranes, contrary to common misconceptions, is not limited to the protection of waterproofing from mechanical damage due to backfilling, device dumpling and replacement of concrete preparation. The profiled membranes are also used for the installation of green roofs (20 mm + perforated membranes are used, the perforation serves to drain excess moisture and the profile of 20 mm is used for its accumulation), also profiled membranes are used as a capillary interrupting layer, insulation of the stylobate parts, cushioning layer of industrial floors , in road construction, landscape design, etc.

Differences in membrane modifications

Principal differences, profiled membranes in their compressive strength (that is, the volume, the pressure that they can withstand, while maintaining the declared draining ability). The density of the membrane is an erroneously accepted characteristic of membranes (of course, if the membrane is not planned to be used as a ballast). According to the type of strength, there are three categories: low strength, such as Delta NB, Villadeyn, strength up to 250 kN / m2, medium strength (Iso Drain 8, Delta MS) with strength up to 400 kN / m2, and high strength (Iso Drain 10, Della Teraxx, etc.)

Also, the fundamental difference between profiled membranes is the availability of geotextiles. The imported membranes of Interplast and Durken producers are produced with high-quality thermo-bonded geotextiles with a low degree of siltation, and high water-permeability like Typar, Bonar or Terram. Domestic producers of profiled membranes prefer non-woven needle-punched geotextiles (except for the Plane Geo membrane, but the quality of bonding on the Geo Plater is so poor that it is more profitable to purchase separately the Platter and separately geotextile), in order to reduce the cost of the final product, however, it is important to note that such a geotextile has a low culvert ability, as well as a high degree of silting. Therefore, if the budget does not provide for the purchase of a profiled membrane with thermo-bonded geotextiles, and the project requires the use of a profiled membrane with geotextile, we recommend that you purchase a profiled membrane separately, and separately a thermo-bonded geotextile.

Manufacturers of profiled membranes in Russia
Several manufacturers of profiled membranes are represented in Russia:

Tekhnonikol, Russia (Planker 250 kN / m2, Planker Geo 250 kN / m2 + Geotextile Taipar, Planter Extra 310 kN / m2, Eco Planter 200 kN / m2, Terter Extra Geo 310kN / m2 + geotextile Taipar) - are made from recycled materials
IzoDrain, Germany - the widest line of profiled membranes, which includes profiled membranes with a high profile from 1 mm (for complex engineering solutions), finishing 25 mm (for green roofs with plantations having a large root system), from 50% of primary raw materials
Delta Durken is one of the best quality profiled membranes in the domestic market, with 100% primary raw material, high quality filtering thermo-bonded geotextile, the membrane line is not wide, but covers most of the popular building solutions using drainage membranes
Ikopal - is represented by only two standard 8 mm membranes from recyclable materials, an economy segment.
Frequent mistakes in the purchase of membranes
The main misconception of a private builder is that a profiled (drainage) membrane can be used as a waterproofing layer - no, drainage membranes are not waterproofing materials and can not be used for the construction of waterproofing layers.

The main and particular misconception in industrial civil construction is that the drainage membranes must be tightly sealed at the joints. - It is not so, the overlaps of the drainage membranes should be fastened in such a way as to provide the minimum downforce that should be sufficient for the backfilling process.