Advice re soil from raised bed against brick garage wall
Following a chat we had about the use of bamboo in a raised bed at the back of our garden, I've been thinking quite a lot (!) about some comments I had about the landscaper using the wall of the garage as the fourth side for the raised bed. Thank you all for raising this - I am fairly new to this and all the advice I get is much appreciated!
With that bed (see pic 1), the soil is five bricks below the damp course level of the garage. (One of the problems we've got is that the garden is surrounded by neighbours' garages and the damp course levels are all different.) Does this make any difference?
We have another couple of raised beds (e.g. pic 2) where the soil level is 3.5 bricks above the damp course (15-16 inches of soil above the ground). There is drainage in the bed at the sides / back.
I don't want to cause any damage to anyone else's property - I wondered what suggestions any of you nice people (!) had as a way of sorting out this problem? Is it the case that I need to empty the beds and get someone to put in other side at the back made up of sleepers, to leave a gap between the bed and the wall? I've seen various suggestions on various forums - damp course membrane against the wall. Someone else said at the back of the bed put a vertical layer of membrane and then stones between the brick and the membrane as this will prevent water from sitting next to the wall. What does anyone think?
Many thanks in advance for your help - it's giving me some sleepless nights!