FFB-VS

The declared product is a mineral wool panel made of artificial mineral fibres running parallel to the surface which is manufactured in a procedure using heat and held together by added adhesive once cooled. The panels are clad on both sides with plastic fibre-reinforced aluminium foil which is applied whilst the panel is hot and fixed with the adhesive which holds the mineral fibres together. An expandable graphite strip (RSI strip) with a printed PVC adhesive foil is fixed to one longitudinal side.

The declared product is a fire protection barrier made of man-made mineral fibres oriented parallel to the surface of the boards. The product is manufactured in a hot process and, after cooling, held together by added adhesive. The boards are laminated on both sides with a glass fibre-reinforced aluminium foil. An expandable graphite strip is attached to one long side of the product to be declared with a printed PVC adhesive film. Technical data: The constructional data of the average product examined as part of the LCA study is shown in table form below. Declared unit: The declared unit is 1 m of mineral wool fire protection barrier with a glass fibre-reinforced aluminium foil and an expandable graphite strip.

The building product to be declared is a horizontally installed fire protection barrier built in building cladding. FFB-VS was developed to provide a 25 or 50 mm ventilation gap which lets through the airflow and moisture on the back of the building cladding (ventilated rainscreen façade) and closes under fire conditions. In case of fire the intumescent agent along the front edge expands horizontally to close the gap and prevent the passage of fire. This prevents the chimney effect and the vertical spread of fire into the floors above.