So I have tenants that live on the first floor, and I live on the second floor. Both levels have hardwood floors in this 1920s duplex I own and there can be some loud noises due to the flooring so I added some insulation to the basement to help. I started with a little section.
Picture: https://ibb.co/Prb8XKq
I used 3.5-inch Owens Corning mineral wool but noticed I still have a lot of room. Could I add faced fiberglass insulation under that, then add some furring strips to have room for wires, and toss up some simple sheetrock? Or is that a waste in your opinion...
The rim joists are sprayfoamed, along with a tiny crawl space, and newer windows so really just looking for sound absorption. Plus the basement is a shared space for laundry and the added insulation idea is for a bit more privacy.
What would you do next?