I am designing a shed for my garden and I would like to build the shed inset from the concrete base by about 20cm on each side. The concrete base already exists (built before I brought my house). It has to be inset as there are fences either side and I will need a bit of a gap for construction.
My concern is that it will not be waterproof enough. As water can fall on the concrete and travel to the wooden framing.
My current idea is to lay a single course of bricks and cover then in some sort of waterproofing layer (not sure what to use for that). I am unsure if that is a good idea though.
What are your thoughts?