18mm Storm Grey fascia boards do not require a backing board - they are a straight replacement for old timber fascias, as they are nailed directly onto the rafter feet.Our storm grey smooth finish fascia boards are available in a wide range of widths including 150mm, 175mm, 200mm, 225mm, 250mm andamp; 410mm; all of which are supplied in 5-metre lengths and packs of two (excluding the 410mm boards.)The return leg on the board is slightly rebated to accept a soffit board.Freefoam Replacement FasciaAvailable in 6 different sizes ranging from 150mm to 410mm in a wide selection of colours featuring Freefoam patented Colourmax technology.It is recommended to use Freefoamand#039;s N50 Plastop Plastic Headed Nails for capping over the following Replacement Fascia products (and their other size variants.)Replacement Fascia Boards: 175mm - 225mmReplacement Fascia Joints: 300mm - 600mmReplacement Fascia Double End Joint: 600mmReplacement Fascia Double End Corner: 600mmReplacement Fascia Internal