I am remodeling a half-bath (no tub/shower), and am preparing to hang new drywall. Prior to doing so, I thought it would be a good opportunity to replace the insulation and foam seal along the studs and outlet, and caulk the bottom plate.One of the bathroom walls (the wall with the plumbing) is an exterior wall, and it currently has exterior wall -> unfaced insulation -> plastic vapor barrier stapled on studs. I am wondering if I should put a vapor barrier back after replacing the insulation, and I am finding a lot of conflicting information.I am located in the southeastern US (Charlotte, NC / National Zone 3 / NC Zone 7). In my area, the weather is hot and humid several months out of the year with winters having some nights below freezing, but generally above freezing during the day. Based on my research, it seems like the plastic vapor barrier should actually follow the exterior side (e.g. exterior wall -> plastic vapor barrier -> unfaced or sliced faced insulation). This is obviously not an option at this point, and I'm not sure if my understanding is even correct.It appears that my local code does not require a vapor barrier, and if I were to use one, the kraft faced batts should be fine. So would I be better off just installing faced insulation with the faced side facing outwards (i.e. touching exterior)? Or should I just put it back like I found it (i.e. sliced faced insulation --> vapor barrier).Thank you for your help!References:NC Residential CodeVapor barrier I'm usingInsulation I'm usingFoam I'm using (1), (2), and (3) via /r/DIY http://bit.ly/2B8d1km
