Well, it's important to understand the current design and also what exactly you want to achieve. Root and Home nodes are different nodes in Kentico CMS
, and if you wish to display "Home" in menu, ensure that "Show in menu/navigation" is enabled for Home node (that's present in sample Corporate Site), not for root node.
Another thing is to have the home node with url matching the main domain - like "www.mydomain.com". It is possible to achieve that using several steps (redirection, web.config setting, etc.), depending on the IIS version you're using.
Does it make sense?