9- Don’t Include Exterior Elements, Corridors and Party Walls
Don’t include exterior elements in a group created for repeating interior parts like hotel rooms, apartments, patient rooms, etc. Exterior and interior don’t mix well in the same group.
Party walls, corridor walls, and corridor doors shouldn’t be part of a group.
You cannot include elements in a group that are hosted on party or corridor walls. Instead, replace them with non-wall-hosted elements.
The exception to these rules is modular construction. The content of a group should reflect the actual components of the module. The elements built directly on site and that are not part of a module should not be included in groups.
As you can see below, the corridors and exterior components aren’t included in the group.