Moss wall is very easy to make. You can use anything that is denser than water, so it will sink. For instance, over here I'm using a plastic plate. From there, I simply take a thin layer of moss, then use cotton string to tie it down by coiling round and round the plate. Soon, the moss will grow out.
Some people simply staple the moss only a styrofoam board. Some use metal grids, like what you use for BBQ.
Some people simply staple the moss only a styrofoam board. Some use metal grids, like what you use for BBQ.