I have used Polar Notions and love them, but they are very pricey. I have thought about getting the comic backings but because my sewing studio is in the basement I was afraid that they wouldn't hold up to dampness. Now I do have a dehumidifier down there that runs when it needs to and I don't feel that my basement is damp. My question is-will the comic book backings hold up in a basement? Will they bend, warp or whatever from the basement air? What are your thoughts?