Tenmat’s VFB Plus Ventilated Fire Barriers are ’open state’ cavity fire barriers for ventilated cavities of up to 450mm.
Each VFB Plus consists of a specially formulated fire rated stone mineral wool section with an integral high expansion intumescent seal fixed to the leading edge.
The VFB Plus then leaves a maximum 44mm air gap to allow for drainage and maintain ventilation in normal use.
In a fire situation the intumescent seal rapidly expands to seal off the air gap and prevent vertical fire spread within the external wall.
The product has undergone extensive fire testing following the principles of BS EN1363-1 and in accordance with ASFP TGD19 (Fire Resistance Test for ‘Open-State’ Cavity Barriers).
The VFB Plus are mechanically fixed horizontally within ventilated cavities behind the external wall substrate following the fire compartment line.
The VFB Plus are used horizontally and can be installed in conjunction with Tenmat NVFB Non-Ventilated Fire Barriers which provide vertical fire separation along fire compartment party wall lines.

•Typical Fire Ratings of minimum 30 to 60 minutes Integrity and Insulation
•Higher Fire Ratings available dependent on application
•Maintains a 44mm air gap
•Up to 450mm cavities tested
•Standard thickness of 75mm
•Durability and Age Tested
•Fixing brackets included as standard

Availability: To suit from 50mm up to 450mm cavities

Fire Test Approvals

Up to 2 hour fire tested to standards including: BS476: Parts 20 and 22, EN1363-1: 1999, EOTA TR31 and assessed to TGD19 ‘open state cavity barriers’ to ASFP standards for ventilated facades.

Tested in combustible and non-combustible cavity constructions.

Test No.’s: Chilt / A10030
Chilt / IF04065, Chilt / IF06005
Chilt / IF06013, Chilt / IF06040
Chilt / IF08038, Chilt / IF08052
Chilt / IF09011, Chilt / IF09032
Chilt / IF09093, Chilt / A06037
BRE 243-405

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