The black plastic that I am using is not water proof. It has cloth on one side and sprayed on black plastic on the other. The rocks are 1" crushed stone. Something I have left over from when I redid my drive way. The grass doesn't like it and if the grass does get past that, I'm going to spray some "Reliefe" vegetation killer . The crushed stone is purely to provide a solid surface to walk on.
I put down the crushed stone in the floor and placed my second raised bed inside. Now to get those onions into the soil in that bed. They look like they are ready to bulb out at any time. Whoopee!
