Burial Vault. Burial Liner. Outer Burial Container…What are they?
A burial vault or liner is usually made of concrete but can also be made of steel or plastic. It is placed in the grave prior to lowering the casket for in-ground burial. It is a protective container that surrounds the casket, protecting the casket from the weight of the earth and ground maintenance machinery and helps in reducing soil settlement. A vault covers the full container, while a liner usually covers the top and sides only.
Contrary to popular belief, a burial vault or liner is not required by law. It is the cemetery that requires the use of a burial vault or container to prevent the ground from sinking. If required by the cemetery, inquire on your options since there is a significant difference in price between a vault (average $1,195) and a liner (average $400).