Clean all the cracks, and then put all the irregularities when it dries with the help of sandpaper and walk with a primer. The primer is necessary so that the surface is perfect clean and does not have any dust and dirt, otherwise the wallpaper can be poorly glued and fall off. If the walls are too crooked and have many irregularities, then it is better to sheathe with drywall. Now dilute the glue, according to the instructions that are attached to it. We take the glue especially for those wallpaper that you will glue, for vinyl, paper or non -wovelin. Let we glue a little disperse. Be sure to close all the doors of the window so that there are no drafts, and then the wallpaper does not fall off. Measure the height of the wall and cut off the required length wallpaper. Then it is necessary to apply the glue to the wall (using a roller) equal to the width of the wallpaper, and also lubricate the wallpaper itself, and glue it to the wall, starting from above, roll the canvas with a roller, squeezing, thus, the air that turned out to be between the wallpaper and the wall. And so we repeat the procedure around the entire perimeter of the room.