Ok! So I read a bunch or threads on insulating interior walls and ceiling, but none of them said if it was good or useful.
I have a split level that I am remodeling. I was curious if I should insulate the ceiling/floor. I have never seen this before and a freind told me that when his house was inspected the inspector checked for this. When I bought my house the inspector didn't. I live in North West Montana and it can get kinda cold in the winter. I not sure that this would help since we live in both upstairs and downstairs. I suppose it would help as a sound barrier. Any advice would be great!