Description
ARC Open State Cavity Barriers (OSCB) are designed for installation within cavities where ventilation is required in service use. Manufactured from non-combustible rockfibre mineral wool with a reactive intumescent layer, the cavity barrier can provide an air gap of up to either 25mm or 44mm.
The intumescent layer will rapidly expand when exposed to heat in a fire event, closing off the air gap and preventing vertical fire spread within the external wall cavity.
Suitable for installation horizontally, ARC Open State Cavity Barriers should be partnered with ARC Fire Stop Slab installed vertically for a complete cavity barrier solution. The person installing the Open State Cavity Barrier should first familiarise themselves with the datasheet, ensuring the correct product is being fitted into the cavity.
