Product Data Sheet Show all documents

SikaRoof® Drainage Sheet 20

Dimpled sheet with holes for drainage of green roofs

SikaRoof® Drainage Sheet 20 is a drainage and retention sheet on base of premium grade high density polyethylene (HDPE) with dimples 20 mm high and holes for drainage. SikaRoof® Drainage Sheet 20 forms a hollow space between the structural element and the soil, providing both drainage and water retaining properties.

  • High drainage capacity
  • High water retaining capacity ~5.8 l/m²
  • High mechanical resistance (Compression resistance 150 ± 20 kN/m². Tested to ISO 25619-2)
  • Suitable for extensive and intensive green roofs
  • Resistant to all-natural aggressive mediums in ground water and soil
  • Suitable for contact with soft water (aggressive to concrete)
  • Can be installed on damp and wet substrates
Product Data Sheet Show all documents

Usage

Drainage and retention layer for green roofs, in combination with a suitable geotextile on top as filtration layer.  

Advantages

  • High drainage capacity
  • High water retaining capacity ~5.8 l/m²
  • High mechanical resistance (Compression resistance 150 ± 20 kN/m². Tested to ISO 25619-2)
  • Suitable for extensive and intensive green roofs
  • Resistant to all-natural aggressive mediums in ground water and soil
  • Suitable for contact with soft water (aggressive to concrete)
  • Can be installed on damp and wet substrates

Packaging

2.00 m x 20.00 m roll

Colour

Dimpled, black HDPE sheets

02-en_MY-Sikaroof-Drainage-Sheet-20-1000

Product Details

Sustainability / Certifications / Approvals

APPROVALS / STANDARDS

'Geotextiles and geotextile-related products – Characteristics required for use in drainage systems' according to EN 13252
Product Information

Shelf Life

No expiration date if product is stored under storage conditions stated in this Product Data Sheet

Storage Conditions

Rolls must be stored in their original package, in horizontal position and under cool and dry conditions. SikaRoof® Drainage Sheet 20 must be protected from direct sunlight, rain, snow and ice, etc.

 

Length

20.00 m

Width

2.00 m

Thickness

Foil thickness

 1 ± 0.2 mm

Height

20 ± 2 mm

(EN 9863-1)

Weight

1,000 ± 50 g/m²

(EN 9864)
Technical Information

Tensile Strength

7–9 kN/m

(EN ISO 10319)

Water flow capacity

Contact

Load

Hydraulic gradient

Plane flow capacity

S/R

20 kPa

i = 0.04

2.50 l/(m.s) ± 20 %

S/R

20 kPa

i = 0.10

4.30 l/(m.s) ± 20 %

S/R

20 kPa

i = 1.0

10.0 l/(m.s) ± 20 %

S/R = Soft/Rigid

Hydraulic gradient, i = hL/L

Application

Application Information

Ambient Air Temperature

+32 °C max.
Application steps

SUBSTRATE QUALITY

Clean, sound and well compacted. Remove high spots that may damage/puncture the drainage sheet.

APPLICATION

Loosely laid and/or mechanically fastened in accordance with relevant Sika® application manual and installation instructions. To be covered with a suitable geotextile layer before laying with soil.

 

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