Applied horizontally along the compartment line to suit ventilated cavities from 60 mm up to 450 mm, typically with rain screen cladding or similar and will suit most construction types to provide generally up to 180 minutes of integrity and 180 minutes of insulation.

This is possible subject to details, please consult the Nullifire or illbruck Specification Team. Nullifire FV144 is designed to be complimented by Nullifire FJ260 non-ventilated cavity fire barriers applied to the vertical compartment lines.

Nullifire FV144 ventilated cavity fire barriers are ’open state’ cavity fire barriers for ventilated cavities from 60 mm up to 450 mm.

Each Nullifire FV144 ventilated cavity fire barrier consists of a specially formulated fire-rated stone mineral wool section with an integral high expansion intumescent seal fixed to the leading edge.

The Nullifire FV144 ventilated cavity fire barrier then leaves a maximum 44 mm 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.

Nullifire FV144 ventilated cavity fire barrier has undergone extensive fire testing following the principles of ASFP TGD19 (Fire Resistance Test for ‘Open-State’ Cavity Barriers).

Nullifire FV144 ventilated cavity fire barriers are mechanically fixed horizontally within ventilated cavities behind the external wall substrate following the fire compartment line.

Nullifire FV144 ventilated cavity fire barriers are used horizontally and can be installed in conjunction with Nullifire FJ260 Non-Ventilated Fire Barriers which provide vertical fire separation along fire compartment party wall lines.