Do I need to put insulation between the joists under my shower?
Here's a picture of my shower I'm re-doing because of a pinhole leak which I didn't find until the entire shower was gutted. This is in the finished attic of my house, and there was insulation between the joists when I got started but I ripped it out. Is there any reason to put insulation back in these spaces? Originally the attic was unfinished, so that's why there was insulation in there. Below the joists is one of the bedrooms on the second floor. I'm using a Jacuzzi shower pan on top of the 3/4" OSB. Would noise be a problem down below? If so, is there something I could use instead of fiberglass insulation to isolate shower sounds from the bedroom below? The entire area is inside the heated/ac area of the house so no need for insulation that I can think of.