I bet they want an arm and a leg for that stuff.
I used the good ole fiberglass insulation for my walls in my polishing shop. I can turn my radio up full blast and if your outside of the shop you cant hear it. It stays pretty warm in there with a little space heater. I think I may AC my shop in the summer since I dont think i'm loosing any air thru cracks or poor insulation. I still need to do the same to my roof, I dont have any insulation up there yet.
No in my conjoning car shop, I can put the radio in there on full blast and you can hear it 500 feet away from outside the shop with all doors and windows closed
Its also freakin cold in there since I only have it insulated on the car shop to polishing shop wall.