In most areas of the country, no state or local law requires the purchase of an outer burial container. However, many cemeteries require such a container. There are two types of outer burial containers, a grave liner and a vault. In general, a grave liner will only prevent the grave from collapsing and settling. A vault will perform these same functions as well prevent gravesite elements (water and soil) from entering the container. An outer burial container is an enclosure, usually fabricated of concrete that surrounds the casket in the grave. The purpose for these enclosures is to prevent the graves from continually settling and possibly collapsing as cemetery personnel open graves in different areas of the cemetery. It also allows for the use of heavy equipment for cemetery maintenance. In short, outer burial containers make cemeteries much easier to maintain.
 

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