I've never used lining paper before, when wallpapering, but the wallpaper that I am changing has lining paper underneath and 'she who is all knowlegable' thinks I should also use lining paper. Is it normal to use lining paper or is it only used for a purpose. If the walls are in good condition is it OK to just wallpaper. Am I going to regret not using lining paper, and, believe me, regret I will and probably on a daily basis!