My generator box is aluminum, so it is probably even more important to have good soundproofing. I'm going to install something on the door as well to make it quieter outside.I bought MAT66 80 mil sound deadening for the cockpit area. So glad to hear this should help. After gutting the rear of the coach, I'm thinking that it would be a good idea to also put this on the fiberglass generator enclosure. Anyone do this and did it help?
I'm down to the plywood on the floor, and considering putting down a layer of this, then 1/4" luan and then linoleum. Does much noise come up through the floor? Would it be worth it?