I plan to install a couple of sitting block walls. My pavers will be raised about 9 inches from the surrounding grade in this particular area so the wall will be used for that and I am going to add about 18 inches for the finished sitting bench. So the whole wall height will be about 27-30 inches from the surrounding grade and the sitting bench will be 18 inches high (including cap) from the finished paver height.
What is the bedding for this? My plan is to use 3/4 clean and HPB for the pavers should I use both for the walls as well?
Thanks