Change a surface Type in LBT/HB

Hi there
how can I change the type of any surfaces? I have done an adjacency, but after that it incorrectly change my ground floor (exterior floor) to interior floor? how can I modify it?
Generally it seems that there is no way to change the type/BC of any surfaces in HB o LBT ? am I right ?

I don’t know specifically what you are asking here but this statement is definitely incorrect. There are always ways to override the Face type. Do you want to post a minimal example of what you are trying to do?