I've just bought a new house with carpeted bedrooms upstairs and a large rumpus room underneath that I'm turning into my bedroom. The layout is perfect for privacy as my son is 17 and being sydney will probably be at home for a long time yet.
He's very allergic to carpet and it reeks of dog wee so I've already booked someone to rip it all up and polish the beautiful floorboards underneath. The problem is even with the carpet that is there the noisy carry is terrible. We can even hear conversations upstairs and downstairs through the floorboards.
So now our dream of privacy is dying a little and I'm keen for ideas how to soundproof.
First option would be to replace old carpet with an acoustic underlay product of some kind, not ideal given allergies and might cause some issues with deposit I've paid.
I started reading into acoustic foam insulation, spray and ones where you pull off wall panels and ceiling and stick in bats. I'm not sure if that is a super expensive idea or worth embracing. You can access the area between my joists and the floorboards above from the side by pulling down some drywall in a an unfinished storage room behind rumpus room. Feasibly something could be slid in or sprayed in from there.
All the doors are hollow with gaps underneath too so that's something I thought I could improve.
Any thoughts on what I should look into and what options are most cost effective?