Why not try cutting up pieces of sandpaper and glueing them upside down on the decking. This would provide a non-slip surface and if different colour sandpaper were used would also look very pretty. Hope this helps.
I have recently had fitted trvs to the Eight rads in my bungalow and have what may appear to be a minor problem with one of the rads which was moved by simply extending the pipework around two walls, the prob is that it now clicks very loudly when warming up (not sure how long for as we turn it off ...
