On display at our Decking Centre in Swansea South Wales Millboard Decking is one of the finest wood-free or composite decking alternatives on the market. Millboard's unique Lastane surface is non-porous and its anti-fungal properties can boast the highest anti-slip rating, ensuring outdoor spaces are safer and will look inviting for years to come this product has Full BS Standard anti-slip rating and comes with a 25 year backed manufacturers warranty.