I also have the pink insulation board for a design wall. In the old house I had it backed with a piece of lauan and covering up the window to the kitchen from my room . When I moved, there wasn't room for it. I didn't want to give up my design wall so I took it off the lauan, cut the insulation board in half lengthwise. (it had broken on the way home from Home Depot so it was already about 6.5 feet tall) made a hinge with duct tape so it folds and that way I can move it easily and fold it when I don't need it. I have thought about getting really thin strips of wood and gluing them to the back for more support but just haven't gotten around to it yet. I also have thought about getting another piece to make it wider by 1/3 and it will still fit in the same space folded.