Hi. I have a rather large plan(12,000 sq/ft one level) that I have been working on and the client has decided they want to change it from a full 8' foundation to an on slab foundation. I know I have done this in the past, but I seem to be running into problems this time. I deleted the existing foundation and created a new one with a 4" slab and 48" stem walls. I also changed the default settings for the floor to be supplied by the foundation room below. What I have now is it still being shown with the floor joist thickness(16") with the slab below it. If I select an individual room, the "floor to be supplied by the foundation room below" is not selected. I tried selecting multiple rooms to change this, but it will only allow me to do it one room at a time. Just wondering if I missed something or do I have to select each room individually to make it work the way I want it to? Thanks.