I am about ready to fully enclose the newly built shower and the existing small toilet and sink in a new and larger bathroom enclosure. I have not framed anything in before other than the back to the shower stall. I am trying to convert a mudroom [containing washer/dryer] and half bath [toilet/sink] into a laundry room [washer/dryer] and full bath [toilet/sink/shower]. It would be nice if I could leave the half bath in place while I am building the enclosing frame [which will enclose all of the space of the half bath as well as some of the existing mud room space]. But this is not essential. Just trying to not make too many mistakes in the building of the frame [which will have an entry door]. I don't think I have any load bearing walls around the bathroom. Except for the rear wall which is the centre wall of this small bungalow and I know the rafters are supported fully on it. I will not be touching this wall. I will try to supply pictures if I can figure out how to upload them to the site.