Waste Less works recently salvaged a large trailer full of paper faced R19 an unfaced R 19. This came from a large collapsed shop in 9 mile. This shop was probably 48 feet long by 36 feet wide and 20 feet high. The insulation was in all of the outer walls and 2 interior rooms. It is mostly R19, but there is some R11 and R13 mixed in. All of it is dry and useable for $300. We picked out the wet and mousy stuff.