Gather wallpaper, paste or adhesive, smoothing tool, utility knife, tape measure, level, pencil, sponge, and ladder
Turn off power and remove outlet covers and switch plates
Clean the wall and let it dry completely
Repair holes, cracks, and uneven areas
Sand smooth and wipe away dust
Prime the wall if needed
Measure the wall height and cut wallpaper strips with extra length
Mark a straight vertical starting line with a level
Mix paste if required, or prepare pre-pasted wallpaper
Apply paste to the wall or wallpaper as directed
Hang the first strip along the marked line
Smooth from the center outward to remove bubbles and wrinkles
Match the next strip to the first and align the pattern
Butt seams together without overlapping unless the wallpaper type requires it
Trim excess at the top and bottom with a sharp knife
Wipe off excess paste with a damp sponge
Repeat for all remaining strips
Reinstall outlet covers and switch plates after the wallpaper dries
Inspect seams and edges and press down any loose areas
Let the wallpaper dry fully before moving furniture back