AFAIK, there is nothing that you can put under a regular paper that will stop it from absorbing the moisture in the room. You might be able to paint the wallpaper with a clear waterbased varnish but you risk activating the wallpaper paste.
Not all vinyl wallpapers look cheap. The following company sells vinyl paper at up to £370 per roll.
Not many people think of having bathroom wallpaper to decorate their walls; most people opt for tiles or interior paint, but not many people know that some wallpaper is suitable for bathrooms. Most styles that are suitable wallpapers for bathrooms are vinyl wallpapers, as they tend to have a...
www.wallpaper-uk.com