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Application

As a water holding and drainage layer above a deck, flat roof or pitched roof where shallow planting is used to create an extensive green roof.

Description

Newton 420 Reservoir is a unique drainage and water-retention membrane for use where a water reservoir is required for extensive green roofs of sedum, herbaceous plants, mosses or grass above decks and roofs.

Unlike other products of this type, Newton 420 Reservoir has a bonded geotextile that prevents intrusion of the soil into the water holding cups during back-fill and compression. This results in a permanently larger volume reservoir than any other 20 mm deep green roof membrane.

When the water holding cups are full, the large drainage holes within the high density polyethylene (HDPE) core allow water to easily pass through to the drainage layer below to prevent saturation and water logging of the green roof above.

Newton 420 Reservoir should continue over construction and movement joints and acts as a decoupling membrane preventing movement from the substrate transferring through to the surface finish.

Consult manufacturer's literature for relevant surface preparation.

Features and benefits:

  • Unique bonded geotextile does not sag into the water holding cups as is the case with loose laid geotextiles.
  • Large drainage holes allow a much higher drainage flow through the membrane than comparative products, ensuring that when the water holding cups are full, the water drains quickly so as not to waterlog the soil.
  • Suspended soil particles (fines) are filtered out by the geotextile layer.
  • Large drainage layer created by the 20 mm HDPE core.
  • Tough and durable.
  • Quick and easy to install.

Applications:

As a water holding and drainage layer above a deck, flat roof or pitched roof where shallow planting is used to create an extensive green roof.

General information
Color

Studded core: Black, Geotextile: White

Material

Studded core: High density polyethylene (HDPE), Geotextile: Polypropylene

Size

21 x 920 x 50000 mm

Uniclass 2015
Pr_25_57_65_60 Plastics sheetsPrimary
Specification data - Plastics sheets
Product Reference

Newton 420 Reservoir (M31)

Standard product features

Material:

  • Studded core: Black HDPE.
  • Geotextile: White polypropylene.

Size:

  • Studded core (h x d): 20 x 19 mm.
  • Geotextile thickness: 1.2 mm.
  • Overall size (w x l): 0.92 x 50 m.
  • Overall thickness: 21.2 mm.

Technical characteristics:

- Features (studded core):

  • Density: 620 g/m².
  • Softening temperature: 148°C.

- Features (geotextile):

Density/ Specific gravity: 0.62 g/m².

- Features (overall):

  • Density: 720 g/m².
  • Service temperature: -40 to +80°C.

- Installed performance:

  • Water-flow at 20 kPa (1:80 slope upper layer, to EN ISO 12958): 0.07 L/m/s.
  • Water-flow at 100 kPa (1:80 slope upper layer, to EN ISO 12958): 0.04 L/m/s.
  • Water-flow at 200 kPa (1:80 slope upper layer, to EN ISO 12958): 0.02 L/m/s.
  • Compressive strength (to ASTM D1621): Temporary loading: >240 kPa; permanent loading: >120 kPa.
  • Water vapour diffusion resistance (to BS EN 1931) – Sd value: >604 m.
  • Water vapour diffusion resistance (calculated from Sd value): 1 208 000 μ/ 3020 MNs/g.
  • CBR puncture resistance (to EN ISO 12236): 2800 N.
  • Tensile strength (to EN ISO 10319): 19 kN/m² (machine direction). 10 kN/m² (cross direction).
  • Chemical and oxidation resistance (to EN14030/ EN ISO 13438): 100% (excellent resistance).

Digital objects
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Revit
Revit 2016 5 2.0
IFC
IFC2X3 4 1.3
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Literature
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