Posted 9/15/2014 07:08 (#4075153 - in reply to #4075104) Subject: RE: insulating inside house walls
KS
A little pricey but open cell spray foam works good. Bathroom, bedroom, utility and mechanical areas are all good spaces to soundproof.
If you have all open, put some blocking up at 72" off the floor to have wood to hang pictures and stuff without having to find a stud. There also some premade things that are made with 3/4" plywood that nail on the studs. Sheetrock supply place would have these.