Why the same face base void family works differently on internal and external faces of a wall

[Draxl_Andreas]

@farshidkaviani ,

try to find topics like this

Get surface from list surface?

Hi guys, I have a list surface from element. I get all surfaces is parallel. After that, i want to get two surfaces outermost. What can i do to get them? I thinked to use Local Coordinate System, but then i don’t script to continue. Many thanks. [sf]

f.e. group by key the surfaces

KR

Andreas