Yes, I do have bare concrete walls and floor. That’s crazy, I never would’ve thought they “shed” dust or anything.
For a haunted house a few years ago we put painters tarp on the unfinished walls so they’re somewhat partitioned, but not air tight or anything (or I guess “dust tight”) but depending on how it works I could easily seal off one of the rooms since it is already pretty sealed. Would I need to cover the floor and walls as well?