Bathroom insulation....which walls need it which dont

[Kevin Fontleroy]

Hey everyone, looking for some help here. I am in the middle of rehabbing a bathroom and had to open all the walls. Only the exterior wall had insulation and I want know if other walls need it and what kind it needs.

Any other tips would be great. 

Thanks

[Christian Wathne]

Fairly normal for insulation only to be on the exterior walls.

On a flip or rental I wouldn't do this; but when we rehabbed a house to live in we added roxul sound deadening insulation to the bathrooms, laundry room and master bedroom walls