fischer FFB-VS Fire barrier for ventilated façades

FFB-VS a foil-faced stone wool pre-cut unit, which has a powerful intumescent graphite strip bonded to the exposed face.‎ The intumescent graphite strip is pre-wrapped with a durable polythene adhesive sheet to prevent water ingress.‎ FFB-VS has been designed to provide a 25 and 50 mm ventilation gap, that allows air flow and moisture to pass down the back of the cladding.‎ Under fire conditions, the powerful intumescent along the front edge expands horizontally to close the gap and prevent the passage of fire.‎ Further info from manufacturer on FFB-VS fischer