HUWA--Drain sheet,Drain sheet, Drainage sheet, drainer sheet

Drain sheet   is a high compressive strength and high flow rate studded plastic sheet that provides effective drainage and waterproof membrane protection for foundation walls and other underground structures. The integrated non-woven geotextile covering the studs prevents soil particles blocking the drainage shet, creates an air gap for reliable ventilation and allows inflow and transport of water from surrounding soil.

Drain sheet  with its special stud structure effectively captures and transports high water volumes and resists high loads from earth and formwork.

Drain sheet is installed with the geotextile facing the backfill and can be used vertically at depths of up to 10 metres.

Applications

Typical areas of application include:

Retaining and basement walls

Tunnels and landfills

Paved areas

Roof gardens and landscaped decks

Advantages

Provides an efficient drainage system for underground structures

Acts as a protection layer over waterproofing membranes

Creates a vapour and thermal insulation barrier adjacent to waterproofing membranes

High compressive strength of 400 kN/m2 (40 t/m2) permits usage in high weight bearing loadsituations

Wide and easy to handle rolls result in rapidand low cost installation

Specifications

Material: High density polyethylene

Weight: approx. 450 g/m2

Sheet thickness: approx. 0.6 mm

Dimple height: 10 mm

Void volume between dimples: approx. 7.9 l/m2

Drainage capacity: approx. 4.8 l/s.mapprox. 288 l/min.mapprox. 17,280 l/h.m

Geotextile weight: 150 g/m2

Geotextile water transmission: approx. 100 l/s.m2

Compressive strength: approx. 400 kN/m2 (40 t/m2)

Service temperature: -30ºC to 80ºC

Biological/chemical resistance: Resistant to ground chemicals, rot, moulds, algae, bacteria and root penetration. Does not affect potable water