basically its a wall that seperates the soil from the shed wall the slates act as a cover so the internal space dosnt fill with soil or leaves and because its aired damp wont get into the shed
do it in block its quicker
measure first and caculate what blocks are needed but try to put the cut at the bottem
casting will take a while for it to set brick laying it takes a while to build fastest option lay blocks
I agree entirely - you have said nothing wrong - but, when you look at the 3rd photograph on the 1st post of this thread provided by Onoff on the 15th Sept - he has more room.