Our Bullnose fascia is manufactured by freefoam, it is 18mm thick and it comes in a range of widths from 150mm to 250mm.Bullnose fascia boards can be fixed directly to the rafter ends without the need for a backing board, it should be fixed using 2 x 65mm polytop nails at each rafter (maximum spacing 600mm).The rear of the board is rebated at the bottom edge to accept a soffit board.