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RIW Gas Seal HC

RIW Gas Seal HC

RIW

Multi-layered, blended polyethylene membrane for protection against ground gas and hydrocarbons.

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Application

Suitable for use as a combined ground floor damp proof membrane and hydrocarbon/ gas barrier.

Description

A 0.5 mm-thick, multi-layered, blended polyethylene smooth sheet, typically used as a gas barrier and damp proof membrane in concrete floors below the slab or where additional protection from hydrocarbons and VOCs are required.


Features and benefits:

  • Hydrocarbon, methane, carbon dioxide, radon and VOC barrier.
  • Manufactured from virgin material, not recycled waste.
  • Separate damp proof membrane not required.
  • Robust jointing and sealing system.
  • High puncture resistance.
  • Welded joints possible.
  • Complies with latest code of practice as published by CIRIA and BRE.
  • Compliant with BS 8485:2015.


Accessories:

A range of accessories are available (specified separately):

  • RIW Gas Seal GR DPC: Gas resistant damp proof course/ cavity tray, 450, 600 or 900 mm wide.
  • RIW Gas Seal Pipe Collar: Pre-fabricated ‘top-hats' for sealing around pipe penetrations. Available in 100, 130 and 160 mm diameters.
  • RIW Gas Seal Tape HC: Double-sided self-adhesive butyl tape, 100 mm wide, for sealing between overlaps in the membrane.
  • RIW Lap Tape RB: Self-adhesive polymer/ bitumen compound with polypropylene woven mesh, 75 mm wide, for sealing edges of lapped product.
  • RIW Pre-Formed Gas Cloaks: Pre-fabricated units for internal/ external corners and door reveals.

General information

Material

EVOH

Size

2.0 x 50 m

Width x roll length.

Uniclass

Pr_25_57_65_60 Plastics sheetsPrimary

CAWS

J40/35 Loose-laid plastics or rubber gas-retardant membranes

J40/140 Loose-laid plastics or rubber sheet gas-retardant membranes

Specification data - Plastics sheets Enhanced data

Material

Multi-layered, blended polyethylene.

Purpose

Gas retardance, damp-proof membrane.

Standard

To BS 8485.

Performance characteristics

-

Tensile strength (minimum)

To BS EN 12311-1, >550 N/50mm².

Tear resistance

Tear resistance (to EN 12310-1): >300 N.

Resistant to underground gases

Methane.

Methane permeability (to BS ISO 15105-1): 0.13 ml/m²/day/atmosphere.

Physical properties

-

Colour

Black and grey.

Dimensions

-

Thickness (minimum)

0.5 mm.

Width (minimum)

2.0 m.

Roll length (minimum)

50 m.

Recycled content

None – virgin material.

Product Reference

RIW Gas Seal HC

Sealed Laps

150 mm.

Tensile elongation property

To EN 12311-1, 400%.

Water vapour transmission

To BS EN 1931, 0.14 g/m²/day.

Environmental information

Recycled content

0 %

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