Hello guys,
I am trying to build a building in Trnbuild with 2 floors. I am little confuse about the surfaces and walls. Some of you might help me with that. i checked restaurant example but its a single floor thus upper ceiling
is roof but how does it work when one wants to build 2 or more floors. what option should i choose to make a ceiling between two floors in wall type or there is other way. Should i choose INTFLOOR or ROOF or Ground in wall type on Trnbuild? in category INTERNAL
or ADJACENT ? 
Br,
Shiva