With regard to your neighbours wall. If you get too close to it you could produce a rats nest environment (ie an area that you cannot get to for regular maintenance.
There is one more practical method that would be cheaper than those so far suggested. If you wanted to do a bit of ground work. You could lay a drainage system beneath your slab to lead away the water behind the retaining wall. The retaining wall could then be the front wall of the shed.
It would be a bit more complex in the building, but cheeper in materials.[/quote]
There is one more practical method that would be cheaper than those so far suggested. If you wanted to do a bit of ground work. You could lay a drainage system beneath your slab to lead away the water behind the retaining wall. The retaining wall could then be the front wall of the shed.
It would be a bit more complex in the building, but cheeper in materials.[/quote]