Most homeowners lack the knowledge and expertise required to properly inspect the home. A professional inspector understands the various parts of home construction, home safety, and the correct installation and maintenance of various systems. These systems need to work together, and the home inspector understands how they do, why this is of importance, and why one or more systems are now failing.
Furthermore, many homeowners tend to be emotionally attached to the home although they may be in the process of selling it. These emotions often come into play during the inspection process and can lead to items being overlooked. This issue disappears when a professional is called in, as he or she has no emotional attachment to the home and can make an objective assessment of the structure and its systems.