I need to backfill a retaining wall I'm having built next week. The wall is besser block - 27m long and 1.2m high. The depth would vary from about 200mm at the bottom to about 500mm at the top. So what would be the best product to use? Sand or an aggregate? We probably won't be planting anything in it other than fence footings
As it's going to be most load bearing at the top (what we are retaining is actually a 500mm high sandstone wall with dirt on top) what would be the best choice?