What Are the Most Common Types of Burial Vaults?

A burial vault, which is a sealed protective container for a coffin, is most commonly made of concrete, though they can also be made of metal, fiberglass, or durable plastic. Their primary purpose is to protect the casket against the elements and prevent ground sinkage, and many cemeteries require them. An urn vault serves the same purpose when cremated remains are to be buried.

With its lining and seal, a burial vault is more robust than a burial liner (or grave liner). Though also generally made of concrete, a burial liner serves mainly to prevent ground sinkage above the grave. It is unlined on the inside, and may feature holes in the base to allow groundwater to drain or have no base at all. A lined burial vault offers the greatest level of protection for the coffin and has a coated exterior and lined interior. 

There are different types of seals for burial vaults as well. The top seal method features a seal between the walls and lid of the vault, while the air seal method — said to be more secure — creates a pressurized seal using air pressure. Burial vaults can range in their protection level and ornateness, and their price ranges from several hundred to several thousand dollars. 

For green burial, burial vaults are generally not required or even prohibited. 

Sources

“What is a burial vault?” Bradshaw Funeral. https://www.bradshawfuneral.com/blog-posts/7709/what-is-a-burial-vault 

“Burial Packages”. The Chapel of Peace. https://www.thechapelofpeace.com/what-are-burial-vaults-and-graveliners/