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Glossary

What is burial vault?

By Karl-Gustav Kallasmaa

Published October 2025 · Updated May 2026

A burial vault is a sealed outer container, usually concrete or reinforced material, that encloses the casket in the grave. It supports the soil above and helps keep the ground level. Many cemeteries require a vault or a grave liner.

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Cemeteries often require an outer burial container so the ground does not settle and sink over the casket as the years pass. A fully sealed vault is one option; a simpler, unsealed grave liner is another.

Vaults are made from reinforced concrete, sometimes lined with metal or plastic, and are built to bear the weight of soil and maintenance equipment above. A sealed vault is marketed as keeping water and earth out; a grave liner simply covers the top and sides. Neither preserves a body indefinitely, and no vault is needed for the body's sake.

Vaults are a cemetery requirement, not a legal one — no US law requires a casket to be enclosed in a vault. The FTC Funeral Rule entitles you to an itemized price list, so you can compare vault and liner options before buying, and you may buy one from a third-party seller without a surcharge from the funeral home.

Because the vault and its installation are among the larger line items in a traditional burial, confirming the cemetery's actual requirement is one of the simplest ways to control the cost. Where a vault is not required — for example, in many natural or green burial grounds — you can skip it entirely.

Cross-section of a grave showing the casket inside a concrete burial vault below ground level, beneath a headstone.
Where a burial vault sits: the casket rests inside a concrete outer container below ground, which bears the weight of the soil so the grave does not settle.

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Common questions about Burial vault

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This definition is general information, not legal or financial advice. Laws and prices vary by state and provider. See our editorial standards.