Start with the most important wall at the side of the most important light source or window. It is important the the first strip hangs perfectly straight. It is best to draw a vertical line with a pencil using a plumb line or spirit level.
Hang the plumb line about 50 cm from a corner, door or window. Paper walls with windows last of all, so that you can use any shorter strips that you may have left over.
Put the pasting frame at an angle in the paste bucket and secure it under the edge. Spread the paste equally over the fleece roller using the pasting frame.
Apply the wallpaper paste directly onto the wall. Paste it evenly so that the pasted area is slightly larger than the strip of paper you are about to hang.
Place the paper against the pasted wall, placing the edge as near as possible to the vertical pencil line. Allow the paper to overlap by 3 cm at the top, which you later cut off.
Smooth out the strip of paper using a wallpaper spatula, removing any air bubbles. Start at the top and work your way down, and from the middle to the edges. Ensure the wallpaper strips butt neatly against each other, so that the seam is almost invisible.
Using the spatula, carefully press the paper into the corner between the wall and the ceiling, and also between the wall and the skirting board.
Cut away any excess paper at the top with a Stanley knife. Do the same at the bottom. Ensure the blade is sharp in order to avoid ripping the paper.
Place the next strip of wallpaper in the same way and ensure that it butts neatly against the existing strip already on the wall.