Stupid question?? floor between two floors...

Perhaps it should be a stupid question... :oops: Between two doors wich divides 2 rooms, what should I put in the floor?? If two rooms have floating floor, the space between the doors must be hollow? Should I float this part too??

To maintain the separation of the floors/walls etc, there does need to be a small gap; if things are built well, 1/4" (6mm) is enough. I've drawn some ways to keep inner and outer door frames separate, these might help - http://www.johnlsayers.com/phpBB2/viewtopic.php?p=22297 And this -