This is a follow up for this question where I was asking for help on cutting in half and relocating a shed. The job is done and the result looks like this
I have take the shed out of there in order to build a proper base for it. (due to weather conditions I had to cut short my work last year). Now I would like to build a base using concrete slabs. As you can see in the picture my neighbor already has his shed in the same position. Below is a schematic representation of the result with some relevant dimensions included
Question: what is the correct way to manage the rain water between these two sheds in such a way that nobody gets hurt. I have a gutter attached to the long side of my shed but my neighbor does not have one. I am plannig to ask him to attach one to his shed
The other issue here is this: I already dug a 5" base for my shed and I am going to add there gravel, slabs and a bed for slabs. Do I need to slope the subgrade (the soil) in order to make sure that the water moves away from the wall of my house?
Edit: I am contemplating a solution like this:
I will use concrete edging (long blocks 1.75"x2X35").The concrete edging will go below the subgrade level. The subgrade will be level. I need to focus on preventing lateral water infiltration. Above is the shed and I have a gutter so no need to worry about what comes from above. I need to worry above what comes for my neighbor if he refuses to add a gutter to his shed. Below the bottom of my 6" deep cement blocks everything is a fair game, the water can go equally toward my house or his house. I was afraid that by digging the base for my shed I am going to create an area where the water would collect if in excess because it will be gravel and sand.