I am finally going to make my own design wall. Space is at a premium, so mine will have to be able to fold and put out of sight. I have heard that I can use foam insulation board and cover it with a flannel sheet, but the dh and i are at an impasse. I say the 1/4" board is okay, but he says 1/2" to 1" is best. What did you use to attach the flannel to the board? What have you done to make a design wall, and what are the sizes that you have, or wish to have. thanks!!!