I have an attic sewing room, connected to the guest bedroom by a 3'hallway. On one side is the pony (1/2) wall divider for the stairway and the other side is a blank sheetrocked wall about 6' tall. I just tacked up flannel cloth for my design wall and pieces do stick to it. But I have a window in my sewing room which, when open, will blow the pieces off. So I usually use pins. I've been doing scrappy strip foundation pieces, so I pin up my strips to see which strips look best next to each other. I haven't been able to get back to it for a couple months now..(Sigh!)