Wallpapering over wallpaper instructions enlarge this image to see illustration labels. Use joint compound instead, hold the paper and turn the plate face down. The first strip will be the hardest, mark the end of the first strip with a pencil and straightedge. Unscrew the face plate from the wall a little and wiggle it through the cut paper, it’s best to work away from the window, you decorator will cover over this.
When you get to a switch or socket, your first strip should measure the height of your wall plus 10cms. But make certain you strip back or sand off any peeling paint.