great suggestions with lots of details. I think one problem is I am trying to do many "non-standard" things at once like modeling 6" of rigid foam on the roof, 3" on the walls and I have bonus room over the garage with the foundation for the garage 16" lower than the rest of the house. only way that seemed to work for me was to set the garage floor at 0 and the rest of the house at 16", which is creating some issues i am fighting when using auto anything. I tried making main floor at 0 and garage at -16" but it kept fighting me. Also have vaulted ceiling to deal with in back of house mixed with another shed roof porch, etc.. It's been a steep learning curve for me, so I wanted to autoroof as much as possible, but finding it may be a challenge, and i keep failing at manual roof. Anyway, i will try starting over with your suggestions. Thanks.