Although not required by law, you may choose a burial vault: a sealed, warranted, and lined outer receptacle used in cemeteries for underground interment. Your cemetery or memorial park may require outer burial containers, as they help preserve the property´s beauty. They also help reduce maintenance costs by supporting the weight of the earth and of heavy equipment that may pass over the grave.
The vault is usually set at the grave prior to interment. A brief graveside service may be held when the casket is interred. After the service, the cover will be placed over the base. The grave will be filled, compacted, and then seeded or sodded.