Vinyl siding - flashing question?

hosscat

I am looking into covering a concrete pad to make a carport on the side of my house. The carport will be relatively easy, however I'm not sure of the best way to attach it to the side of my house. It will be attaching to the side of my 2 story house that has board and batten vinyl siding. Is there a way to flash to vinyl siding, or would I have to remove the siding, put the flashing up then "J" channel around it? Most of my concrete slab is already poured (25x25), and it is poured all the way to my foundation (just 2 blocks high). So I have also thought about building my carport so is off of my house by maybe 6" to 1', which would allow the over hangs to overlap and may not look stupid with my slab extending just a little beyond my roof and just making a short 4' wide connector, to attached the carport to the house. I have attached a quick sketch, please give me some ideas.



Thanks,