Protecto-drain 20

Protecto-drain 20

Wallbarn Ltd Third party certifications:
  • QA Certificate

    QA Certificate

    Certificate type

Heavy duty protection and drainage layer.

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+44 (0)20 8916 2222


  • Tanking, planters and temporary protection (internal and external).
  • Road and railway construction, bridges and tunnels, and reservoirs.
  • For basements and subterranean structures.
  • Protection layer for concrete pour. Suitable for use as a horizontal vapour barrier and damp-proof layer, covered with a concrete screed.


Heavy duty protection and drainage layer.

Features and benefits:

  • High density polyethylene (HPDE).
  • Designed for areas requiring greater compression tolerance, impact resistance and larger volume of water drainage.
  • Waterproof membrane manufactured with an egg-box shaped profile to prevent abrasion and puncturing of tanking membranes and allow water to drain vertically down the side of the structure.
  • Resistant to chemicals, roots, mould and bacteria, but requires protection from UV.
  • Harmless to drinking water.

General information




High density polyethylene (HPDE)


1900 x 20 000 mm

Uniclass 2015

Pr_25_57_51_74 Rubber studded sheetsPrimary


Q37/350 Drainage layer

R16/380 Sheet fin drains

Specification data - Rubber studded sheets Enhanced data



Studded layer

High-density polyethylene (HDPE).

Stud height

Air volume between studs: 14 L/m².

20 mm.

Sheet thickness

1.0 mm.

Weight (minimum)

1000 g/m².



Performance characteristics


Water storage capacity

5 L/m².

Flow rate

10 L/s/m.

Fire performance

B2 DIN 4102.

Product Reference

Protecto Drain 20


180 kN/m².

Temperature resistance

-40°C to +80°C.


1900 x 20 000 mm.


Wall fixing.

  • Fix battens to the wall and secure the sheet with pins and studs.
  • The studs are specially designed to fit into the cups. They have a hole in the middle to drive the nails or screws through and will seal the membrane around the nail fixing so no water will go into the pierced area.
  • A cover profile can be fitted to the top edge of the drain, ensuring ventilation of the air gap and prevents particles or water clogging the cavity.


Not required.

Protecto-drain tape.

Bituminous double sided tape for bonding sheets together and to the structure.

Environmental information

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom


Wallbarn Catalogue for Pedestals, Decking, Green Roofs, Waterproofing, Geotextile & Drainage

Wallbarn Catalogue for Pedestals, Decking, Green Roofs, Waterproofing, Geotextile & Drainage

Third party certifications

  • CE

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