This table provides a tool for determining service life expectancies. The service life can vary between maintenance life and replacement life. Maintenance life can be the schedule between conditions where maintenance needs to be performed and replacement life is the term life where an item should be replaced. The life span dates can also vary based on the geographic location of the property as well as the initial quality of the component being used.
An example is brick siding. The lifespan is listed as 80 to 100 years. This might not be when the brick has to be replaced but when some advanced maintenance (pointing) attention is required.