I moved my sewing room to the basement last year when I ran out of room. Ours is dry and I've not had any problem with machines or fabric or odor. I love having all the space although I'm still waiting on walls. I put down plastic on the floor and then our old carpet and pad we took out of the living room. It's cozier to have the carpet although not wonderful to roll around on. I keep my sweeper handy down there so I can clean up after each project. I bought two 6 foot banquet tables and put them on bed risers for a big cutting/layout space. Still looking for more ideas.