Always after buying a door wallpaper you should get instructions and tools to stick it. Sometimes it is not the case and here I explain how you can do it easily. Once you have bought a self-adhesive wallpaper, you need to cut it to the desired size, tape off the back area and stick it to the door. Some manufacturers also offer some chamois stands to avoid bubbles when sticking, but if you stick it carefully you can do it on your own.