So I am considering using Versastone as garden edging. Just one block high plus capping along certain areas of my backyard. This is Versastone.
http://i1179.photobucket.com/albums/x400/smallnads/Mobile%20Uploads/IMG_3711_zpszzgfpi4s.jpg
When used as a retaining wall it is meant to be core filled with something like blue metal.
As I'll be using it as edging do you think I'll still need to core fill it? I also assume I'll need to lay a concrete foundation to lay them on, how deep would you think I'd need the foundations/concrete?
I've tried Googling but all of the information I have found has to do with using them as a retaining wall ?