I am in the process of renovating my kitchen. I removed everything down to the studs. One of my bathrooms backs up to my kitchen. Once I opened up the wall behind my bathroom shower stall (a fiberglass one piece tub and surround), I see that there is no insulation, drywall, or cement board around my shower stall. It is just sitting in the open on the other side of my kitchen studs.
The bathroom is a small 3 fixture bathroom that has 1 exterior wall. This exterior wall is about 10’ long and the foot end of the tub is on the exterior wall. From what I can see, there is no insulation in this exterior wall. This bathroom was remodeled about 20 years ago and they added this stall. I think they removed the insulation only in this area--not the entire length of the wall.
This stall does not go all the way to the ceiling so it has drywall from around the top of the shower to the ceiling. Is it possible to put some type of insulation in this void around the stall? I have often said that this bathroom didn't feel as though is was insulated. It is always cold in this bathroom in the winter.
I do not want to tear out the shower stall at this point, but am hoping to be able to do something with the access that I have from my open kitchen walls. I do not know anything about vapor barriers or appropriate types of insulation for this situation.