I am planning on putting in concrete on the side of my house. I know to slope the concrete away from the house. I have some concrete type stuff under ground where the dirt hits the side of the house, do i just knock that out so i can get down to my 6 inches. Also the side where i am slopping to is a fence....? how do i approach putting in this concrete with concrete hodling the posts in? do i just go around that? One other question if i may :) i know to use min 6 inch concrete with rebar so i can park an rv on it..how much rebar should i use and if i want to run rv electricity what kind/size of conduit must i use under the slabe for when i eventually bring in electricity? Thanks and sorry for so many questions!!