You want your investment in your wallpaper project to be one that gives you pleasure for years to come, and not one that brings remorse. The wallpaper industry is experiencing a tremendous upward trend and installers are in high demand - and in short supply. Be prepared to check the credentials of anyone that you are considering hiring. A recent example: On a job I estimated, the contractor hired someone whose estimate was half of what mine was. The person they hired ruined the wallpaper, which had to be removed. Upon further examination, it became apparent that at least three critical steps had been skipped during the installation! Thus, the adage, "So you think it costs too much to hire a professional? Just wait to see what hiring an amateur costs."