Moderator Post (s) for this thread: >Plumbing and siding?byBillhart on 11/22/2008
The rough-in plumbing is usually installed only after the house or addition has been 'dried-in'....that is, only after the house/addition has been framed, roofed, sided and windows and doors installed.
But it could be done before the siding, roofing, and windows and doors are installed.