My son has just finished his first year of bricklaying course and is about to rebuild a wall in my back garden. It will need about 200 blocks to replace the ones which are there. and will be about 8 blocks tall, laid flat. It is holding back a top tier of the garden and I was going to dig it back a bit to get a good straight line for him to start with. What mix should he use to lay them with, I don't really know the difference between mortar and concrete so any help would be appreciated. Also any advice where best place to get the blocks from, a friend of mine has a trade card so should be able to get trade discount hopefully.
Thanks in advance
Thanks in advance