Description:

HYDRODUCT® drainage sheets are pre-fabricated geocomposites comprising studded polystyrene drainage cores covered with polypropylene filter fabric. They provide efficient, cost effective alternatives to traditional aggregate drainage.

HYDRODUCT® drainage sheets must link with either HYDRODUCT® Coil 150 or perforated sub-soil drains at the bottom of the basement wall, and carry to the site drainage system. This ensures water is drained away from the basement structure.

HYDRODUCT® 220 is a polypropylene non-woven filter fabric on one face of a 12 mm studded drainage core with a pressure dissipation plastic film bonded to the other face. Applied to walls of basements that have been waterproofed with BITUTHENE® membranes. Also applied to existing basement walls and permanent shuttering prior to the application of Preprufe membranes.

Advantages:

• Polystyrene resists creep under long term loading – drainage capacity maintained
• High flow capacity – can drain 5.29 litres/sec/m when backfilled to a depth of 5 m
• Geotextile filter fabric prevents soil particles entering drainage core – minimises risk of clogging
• Rot proof – unaffected by immersion in water and resistant to dilute concentrations of chemicals
• No drainage aggregates needed – excavated soil re-used as backfill