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EXPOL StyroDrain

EXPOL StyroDrain is processed from 100% recycled EPS, fused lightly to allow water to migrate easily through it. The material is cut into sheets which can be placed behind a block wall providing protection for water proofing, and to act as a drainage material for water to flow to the drain coil and away from the wall.

Retaining WallsEXPOL ThermaSlab Retaining Walls

EXPOL StyroDrain offers a lightweight alternative solution to traditional drainage materials for most retaining walls and is specifically designed for situations with limited access.

EXPOL StyroDrain is a permeable lightweight drainage material manufactured from 100% recycled EPS material, offering drainage, and protection to the waterproofing membrane used on retaining walls. A double layer of EXPOL StyroDrain may be required if the retaining wall is higher than 1.2 metres or in special circumstances. StyroDrain comes in easy to handle sheets 90mm thick and can be cut with a sharp knife or hand saw.

For more information refer to our product solution guide here.


Product Resources

Technical Guide
Technical Guide

 

Site Tools

Installation Instructions


PRODUCT OPTIONS & SIZES Length (mm) Width (mm)
EXPOL StyroDrainEXPOL
StyroDrain		 1800 1200

 

Test Results:

Sample Head (mm) Hydraulic 
Gradient (i)		 Density
(kg/m3		 Permeability
(m/s)
1 34 0.33 11.1 4.13 x 10–3
2 34 0.33 11.3 4.30 x 10–3
3 33 0.32 10.8 4.12 x 10–3
Average   0.33 11.1 4.18 x 10–3

General:
To assist in understanding of the results the following is a classification of a soil according to Permeability

Degree of Permeability  Range of Coefficient of permeability (k) (m/s) 
High Greater than 10–3
Medium 10–3 - 10–5
Low 10–5 - 10–7
Very Low 10–7 - 10–9
Practically Impermeable Less than 10–9

Coefficient of permeability (m/s)

k = 1 10–1 10–2 10–3 10–4 10–5 10–6 10–7 10–8 10–9 10–10 10–11 10–12
Drainage 
Characteristics		 Good Poor Practically Impervious
Permeability 
Classification		 High Medium Low Very Low Practically Impermeable
General soil type Gravels Clean Sands Fissured & weathered clays
Intact Clays
Clean Sands Very Fine or silty sands

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