This is dependent on the factors such as weathering, profiling and coatings
The slip resistance of all wooden (decking) boards and many other materials depends on factors such as degree of weathering, surface profiling, coating, wetness of the boards and maintenance – i.e. the presence of a biofilm of bacteria, fungi and algae. Test methods vary greatly across the world and only a few countries have official requirements covering the slip resistance of flooring surfaces.
However, generally speaking, the results for Accoya wood when tested by these test methods are comparable to unmodified wood species with the same surface specifics (including dimensions, profile details, surface finish and the presence of a lubricant and/or biofilm).