To get high enough, stand on a chair.

To start, you need to measure the height from floor to ceiling with a roulette. Add about 7-10 cm. Then cut the wallpaper strip of the required length and lay on the floor. Press the edges with clean objects with small weight. Then, using a wide brush, apply the prepared wallpaper evenly directly to the wallpaper. Take the sheet by the upper edges and raise it. To get high enough, stand on a chair. Press the wallpaper slightly. Take a clean soft rag and starting from the middle, smooth the entire strip. Large bubbles with air should not remain under the wallpaper, and the small ones will disappear over time themselves. Repeat this yet, do not seal all the walls. Follow the correct conjunction of the drawings.