These are the outside containers into which the casket is placed. Burial vaults are designed to protect the casket and may be made of a variety or combination of materials including concrete, stainless steel, galvanized steel, copper, bronze, plastic or fiberglass. A grave liner is a lightweight version of a vault which simply keeps the grave surface from sinking in.
Must I purchase a burial vault?
Most large, active cemeteries have regulations that require the use of a basic grave liner for maintenance and safety purposes. Either a grave liner or a burial vault will satisfy these requirements. Some smaller rural or churchyard cemeteries do not require use of a container to surround the casket in the grave.