The flexi slabs ensure essential tight fitting for thermal and acoustic integrity between frames in walls, partitions, floors and roofs, without the need for cutting or waste. Made from renewable volcanic rock, they are extremely fire resistant and significantly reduce the carbon footprint of a building. Without the need for cutting or waste, the flexi slabs ensure critical tight fitting for thermal and acoustic integrity between frames in walls, partitions, floors, and roofs. They are highly fire resistant and greatly reduce a building's carbon footprint because they are made from renewable volcanic rock. They have a one-of-a-kind flexi-edged insulation product that was created using proprietary technology for a perfect friction match between timber and metal frame systems. Rockwool Flexi offers effective thermal insulation and acoustic performance in all framed areas of the house, with a fire resistance rating of A1 according to BS EN 13501-1. This product reduces noise in two ways: by impeding sound propagation through a structure feature or by absorption of sound at the surface. The slabs are light and simple to work with.