Just sourced the mineral wool for my acoustic panels, It's impossible to get small amounts of rigid fiberglass in Ireland, The best stuff I can get is rockwool RW3, I ordered 20 4 foot by 2 foot slabs, they're 4" thick and the density is 60kg/m3... Now I have to figure out the best way to use them, I'm defo building floor to ceiling bass traps, this will take up 9 or 10, then first reflection points including ceiling cloud.....