Trying build cupola correctly

[ChrisP69]

I'm trying to build cupola on barn. I'm following the directions in the cupola tutorial to the t and bad results. The cupola keeps generating inside the building, won't auto build roof (maybe because it's inside). After I select build new floor and select build new blank floor, dialog box pops up for 2nd floor not sure if I have to change settings in structure tab. Then close box and build walls, roof doesn't build and when view no cupola on top, it just shows inside. Here are some pics. Also I tried to get a screenshot of the room spec box for the cupola but can't, is that possilbe. Architectural 2012.