Description A range of flexible, moisture-resistant cavity barriers for providing an effective fire and smoke seal in the cavity between brick or block walls.WB Flexible Foiled Cavity Barriers A barrier consisting of an intumescent strip faced with high tensile foil, which expands to create a powerful fire and smoke seal. Available in a ventilated form with one, two or three rows of holes, depending on the width of the cavity. WBS Flexible Sponge Cavity Barriers An intumescent impregnated sponge barrier with fire and smoke stopping capabilities. Available in a ventilated form fitted with a rubberised intumescent strip which expands in a fire to fill the ventilation holes. Advantages – All barriers in the range are designed to fix across the gap between the inner and outer course of brick to block or block to block walls– The WB foiled cavity barrier range is designed to be fitted horizontally between brick or block walls, expanding to form a complete fire and smoke barrier in a fire– Foiled cavity barriers are designed to allow insulation material to be installed both above and below the barrier– VWBG barrier is self-draining – ideal for allowing free air flow in and out of cavities where smoke sealing is required– The WBS flexible sponge barriers can be fitted horizontally or vertically between brick or block walls, resisting fire and smoke. The ventilated version, which must be fitted horizontally, is also fitted with an intumescent strip which expands to fill ventilation holes in a fire– Sponge cavity barriers provide their own thermal insulation, but also allow for insulation material to be installed above and below the barrier Application Instructions BRICK AND BLOCK CAVITIESThe barrier is held into the horizontal position by sandwiching it between the bricks and mortar at thebuild stage. For vertical fix using clout nails. BRICK / WOODEN CAVITIESThe barrier is tucked into the brick mortar during build stage, It is then held and fixed to the wooden partition by being pushed into position , because the barrier is flexible it has spring tension and will hold its self in position. CONCRETE TO STEELWORK & STEELWORK TO STEEL FRAMEThe cavity barrier can be attached to the concrete/steel by means of a metal fixing strap FB/c1 1250mm long or FB/c2 2500mm long available from ENVIROGRAF with appropriate fixings The cavity barrier can be formed to the desired profile / shape so that when the cladding is fitted there is sufficient pressure to arch the barrier and form a fire break. General Fixing NotesFix the metal straps with suitable steel fixings or hilti gun.If the cavity barrier needs to be cut foil tape should be applied to the cut area.Foil tape can be purchased separately quoting product code ST50 Order References / Sizes WB Cavity Barriers Vertical & Horizontal Non-ventilated 1 metre length & 2 metre lengthWB80 WB120 WB150 WB200 WB250 Ventilated 1 metre length & 2 metre lengthVWB80 VWB120 VWB150 VWB200 VWB250 WB & VWB are made exact to the width flat. Should you need fixing to face of timber or brick etc. we can make them with a 30mm upstand and washers WBS Cavity Barriers Ventilated fireproof sponge for cavitiesCavity width allow when ordering 10mm wider for compress... Data Sheets TECHNICAL DATA TD055-WB-VWB-10-2018.pdfTD055-WBS-10-2018.pdf APPLICATION DATA AP055-10-2018.pdf COSHH DATA HS055-WB-VWB-RSVWB-RSWB-10-2018.pdfHS055-WBS-VWBS-10-2018.pdf
