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.

  • Ground slabs.
  • Basement walls.
  • Sportfields and gold courses.
  • Chemical storage areas.
  • A diagonal 8mm dimple configuration.
  • Compressive strength of 25m2.
  • Rolls may be joined by overlapping.
  • Creation of efficient drainage and vapour barriers between diaphragms and internal walls.
  • Wide, light weight rolls that allow rapid and low cost installation.
  • Acting as a protection layer over waterproofing membranes.
  • Replacement of lean concrete sub base slabs without compromising load bearing capacity.
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.

Coming soon