IMPTREX™ DRAINBOARD is a modular sheet composed of high strength polyethalene (HDPE) of brown and black colour. Module height is 8 ±0.2mm. It is specially designed as drainage layer and for protection of underground walls.
It acts as a barrier and provides protection to the waterproofing membrane from the backfill. The dimples create a vapour and thermal insulation barrier in both internal walls adjacent to waterproofing membranes.
IMPTREX™ DRAINBOARD offers protection against rising dam in ground slabs and without compromising the load bearing capacity of the sub base.
|Weight||Approx. 450 /500/650 g/m|
|Sheet thickness||Approx. 0.5-0.6 mm|
|Dimple height||>8 mm|
|Void volume between studs||Approx. 5.3 l/m2|
|Discharge capacity||Approx. 4.6 l/s.m approx. 276 l/min.m approx. 16,560 l/h.m|
|Compressive strength||Approx. 250 kN/m2 (25 t/m2)|
|Biological/chemical resistance||Resistant to ground chemicals, rot, moulds, algae, bacteria and root penetration. Does not affect potable water.|