55-Flexible_foiled_cavity_barriers 55-VWB-flexible-ventilated-cavity-barrier55-Self-draining-and-airflow-system55-WBS-flexible-sponge-cavity-barrier55-VWBS-flexible-sponge-ventilated-cavity-barrier
55-Flexible_foiled_cavity_barriers55-VWB-flexible-ventilated-cavity-barrier55-Self-draining-and-airflow-system55-WBS-flexible-sponge-cavity-barrier55-VWBS-flexible-sponge-ventilated-cavity-barrier

Flexible Cavity Barrier Range

Flexible, moisture resistant barriers for use in brick wall cavities. (PRODUCT 55)

REF: PRODUCT 55D
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  • Description
  • APPLICATION INSTRUCTIONS
  • DOWNLOADS
  • ORDER REFERENCES

Product Description

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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

 

FIRE TEST PERFORMANCE

Tested to BS EN 1363-1 1999, achieving up to 132 minutes fire protection.

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APPLICATION INSTRUCTIONS

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BRICK AND BLOCK CAVITIES
The barrier is held into the horizontal position by sandwiching it between the bricks and mortar at the build stage. For vertical fix using clout nails.

BRICK / WOODEN CAVITIES
The 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 FRAME
The 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 NOTES
Fix 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
For continuous lengths the cavity barrier should be overlapped by 50mm

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DOWNLOADS

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Please use the links below to download relevant information as PDF documents:

 

Technical Information

TD055-WB & VWB-12-2012

TD055-WBS-12-2012

 

Application Instructions

AP055-05-2014

 

COSHH Data

HS055-WB & VWB-07-2015

HS055-WBS & VWBS-07-2015

 

 

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ORDER REFERENCES

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WB CAVITY BARRIERS                  Vertical & Horizontal

NON – VENTILATED        1 metre length &  2 metre length

REF
WB80
WB120
WB150
WB200
WB250

 

VENTILATED                1 metre length  &  2 metre length

REF
VWB80
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 cavities
Cavity width – allow when ordering 10mm wider for compression in cavity.
You can have one or 2 ventilation holes : A 1 hole B 2 holes

 

VENTILATED

REF CAVITY WIDTH OF SPONGE ACTUAL WIDTH SPONGE THICKNESS  
VWBS80 80mm 90mm 40mm Hole type A
VWBS135 135mm 145mm 40mm Hole type A or B
VWBS165 165mm 175mm 40mm Hole type A or B
VWBS210 210mm 220mm 40mm Hole type A or B
VWBS265 265mm 275mm 40mm Hole type A or B

 

NON – VENTILATED

REF CAVITY WIDTH OF SPONGE ACTUAL WIDTH SPONGE THICKNESS
WBS80 80mm 90mm 40mm
WBS135 135mm 145mm 40mm
WBS165 165mm 175mm 40mm
WBS210 210mm 220mm 40mm
WBS265 265mm 275mm 40mm

 

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