own a flat in the roof and want to put an ensuite in bedroom. the problems are room, both in floor area and head height, from eaves. What is the maximum run from wc to outside wall and down angle required. If i want to have a non enclosed shower, i.e. no tray, what do i have to do to ensure dont flood my neighbours below. any other general advice on such a project or where i can get it would be appreciated.
jon