Open State Barrier COSB 44
An Open State Cavity barrier for use in ventilated facade systems, reacting in the event of fire to help prevent the spread of fire and hot smoke.
PFC Corofil Open State Barriers combine non-combustible high-density stone wool with a high expansion intumescent strip fixed to the outer face. Depending on the product ordered, it will be supplied either yellow polythene shrink wrapped or foil encapsulated.
PFC Corofil Open State Barrier COSB 44 are designed to close off air gaps of 44mm, the COSB 25 product closes off air gaps of 25mm. The intumescent strip will expand on heating to close off the air gap between the barrier and inner surface of the facade.
Galvanised steel brackets are supplied as standard, stainless steel brackets can be ordered separately if required. The fire resistance performance varies depending on which barrier is required to suit the application and build-up of the substrates. Please refer to the technical data sheet for full details. You can contact our technical team if you need assistance with this product.
PFC Corofil Open State Barrier range is compliant to current market requirements and has been tested to the general principles of EN1363-1 and in accordance with ASFP Technical Guidance Document 19 (TGD 19).
Where should you use Open State Barriers?
PFC Corofil Open State Barriers are designed to reinstate the fire resistance performance of facades which have been designed to maintain a continuous air flow around the building and must accommodate a continuous air gap at the cavity barrier. This allows moisture to dissipate under normal circumstances but reacting in the event of fire to rapidly close off the air gap to help prevent the spread of fire.