I was working on the bus today and removed some of the ceiling panels which I am planning to replace. The factory insulation is all in good shape sealed in plastic and lightly glued to the exterior skin. I removed the insulation in the walls which was deteriorated. I am going to replace that insulation with either foam board or spray foam. I was surprised that the ceiling insulation was in great shape. Should I save it? Replace it? or what?
Your choice, but foam (sheets or spray) will have a higher R value. Jack
Highly recommend spray foam-it will quiet everything and stiffen the walls and ceilings. Good LUck, TomC