We supply a 25mm foil backed polyurethane board that needs to be suspended beneath the floor boards and held in place with insulation clips. The unique insulation clips are designed to allow insulation boards to be installed quickly and easily between timber joists without the need for nails, screws, or battens. They provide a way of holding insulation securely in place. Cut the insulation boards to fit tightly between the floor bearers. Push the clips into the edge of the insulation at 1000mm intervals along the long edge of the board, with the flat edge of the clip sitting on the face of the board. Fit the insulation tightly between the bearers, and push down so that the base of the clip is level with the face of the floor bearer.