NBS Source
Newton 408 Deck Drain


As the drainage layer above a deck, balcony or flat roof waterproofing membrane such as Newton 103-S or Newton 107F, particularly where:

  • Block paving or flooring slabs are bedded on sand as the surface finish;
  • Soil filled planters are included to the deck or flat roof;
  • An intensive green roof is planted to the deck or flat roof.

Also suitable for use as a vertical drainage layer when used as part of a professionally designed and installed externally applied basement waterproofing system.

When used conventionally below block paving or slabs bedded on sand, Newton 408 DeckDrain requires at least one drainage outlet per 10 linear metres of membrane. Consult manufacturer for further details.


A double cuspated, deck and flat roof drainage membrane, which incorporates a polypropylene geotextile filter layer, bonded to a water impermeable high-density polyethylene (HDPE) core. The double cuspated design provides two layers of drainage; allowing for primary drainage through the geotextile filter, as well as secondary drainage between the underside of 408 DeckDrain and the primary waterproofing layer. The lower drainage layer eliminates the risk of trapped water, a problem associated with conventional single cuspated deck drainage membranes.

Features and benefits:

  • Provides a clear and clean drainage path for surface water to roof drainage outlets.
  • Double cuspated (drainage studs to the upper and lower surfaces) design provides a clear and clean drainage path above the deck waterproofing membrane, to ensure that water cannot be trapped above the deck membrane, as can be the case with single cuspated deck drainage membranes
  • Suspended soil particles (fines) are filtered out by the geotextile layer.
  • Quick and easy to install.

General information



Studded core: Black, Geotextile: White


Double cuspated membrane roll


8.4 x 2000 mm x 20 m long

Uniclass 2015

Pr_25_57_65_60 Plastics sheetsPrimary


J40/295 Geocomposite studded cavity drainage/ venting membrane

Q37/110 Intensive green roof

Q37/130 Extensive green roof

Q37/350 Drainage layer

Product range

External Waterproofing and Drainage Membranes

Specification data - Plastics sheets Enhanced data


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


To EN ISO 25619-1, BS EN 1931, EN ISO 10319 and to EN14030/ EN ISO 13438.

Performance characteristics


Tensile strength (minimum)

13.6 kN/m².

Water vapour resistance (minimum)

>1 208 000 µ.

Product Reference

Newton 408 DeckDrain (M33)

Studded layer

High density polyethylene (HDPE)

Stud height

7.1 mm.

Sheet thickness

8.4 mm.

Weight (minimum)

30.0 kg.

Compressive strength – Temporary loading

280 kPa.

Compressive strength – Permanent loading 10 kPa EN ISO 25619-1

10 kPa.

Water vapour diffusion resistance – Sd value

>604 m.

>3020 MNs/g.

Tensile strength (Cross direction)

14.7 kN/m².

Chemical resistance – Excellent


Oxidation resistance – Excellent


Digital objects

Platform Compatible Version Certified to




Revit 2016


Download now from NBS National BIM Library


Newton 408 DeckDrain

Newton 408 DeckDrain

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