Kontract Geotextile

Kontract Geotextile - 40M²


  • £169.95

Geotex Exterior Basement Waterproofing System

Cavity drain membrane, drainage and accessories for exterior isolation and direction of groundwater at basement walls, for installation prior to backfill.

  • For use in conjunction with separate damp proof membrane.
  • Reduces water pressure and ground movement stress on DPM. Groundwater is filtered by geotextile, enters 8 mm cavity (spaced by integral compression studs) and is directed to drainage at base of wall. Integral backing facilitates movement to prevent damage to DPM (specified separately).
  • Can be used up to 10 m below ground.

Roll Size: 2m x 20m

Suitable for use with:

  • Permanent Insulation Formwork walls.
  • Wykamol Tecnoseal DPM. (DPM specified separately).
  • Passive water disposal eg sloping ground.
  • Active water disposal systems eg sump and pump.
  • Wykamol sumps and pumps. (Sumps and pumps specified separately).

Guidance for Geotex Exterior Basement Waterproofing System from Wykamol Group



  • Outer layer: LDPE. Low density polyethylene geotextile. Water transmission rate: 100 L/m²/sec.
  • Middle layer: HDPE. High density polyethylene with moulded compression studs. Compression (maximum): 250 kN/m².
  • Inner layer: PP. Polypropylene slip membrane.
  • Fix to CM Plaster Plugs set in wall at 150 mm centres, adjacent to top of primary waterproofing. Finishing strip protects top edge.
  • Overlap membrane joints and tape using CM Tape. Taped joints are not waterproof.
  • Backfill carefully with earth or other sharps-free fill to avoid irregular stress or mechanical damage to membrane. Membrane is held in place by backfill


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