A four-layer, low density polyethylene membrane reinforcing grid with an integral aluminium foil, typically used as a low density, polyethylene gas barrier and damp proof membrane in concrete floors above and below the slab.

Features and benefits:

Manufactured from virgin material, not recycled waste.
Separate damp proof membrane not required.
Robust jointing and sealing system.
Welded joints possible.
Single wound membrane with zero creases.
Two colour membrane for on-site quality control.
Suitable for use where radon, carbon dioxide, methane and hydrocarbon vapours are present.
Complies with latest codes of practice as published by CIRIA and BRE.
Conforms to BS 8485:2015.
CE marked.

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: Double-sided self-adhesive butyl tape, 50 mm wide, for sealing between overlaps in the membrane.
RIW Lap Tape: Single-sided self-adhesive PVC tape, 100 mm wide, for sealing edges of lapped product.
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.

RIW Gas Seal Black