Burial Vault vs No Vault: Requirements, Costs, and Green Burial Options

What a Burial Vault Actually Does

A burial vault is a rigid outer container — usually reinforced concrete, sometimes metal or polymer — placed in the grave before the casket is lowered in. Its practical purpose is to prevent the ground above the casket from settling as the casket deteriorates. This keeps the cemetery's lawn surface flat and even, which makes mowing easier and prevents maintenance crews from driving over a sunken depression.

That is the full extent of what a vault does. It does not preserve the body. It does not protect the casket from water or soil pressure in any permanent way (concrete is porous over time). It does not serve a public health function. No federal or state law requires a burial vault.

The requirement comes from cemetery policy, not legislation. Most conventional cemeteries in the United States require vaults or grave liners as a condition of purchasing a plot, because managing a flat-lawn aesthetic is central to their operating model.

Vault vs Grave Liner

A vault is a fully enclosed container — a sealed box with a lid, sometimes lined with plastic or stainless steel. Prices vary by material and construction; the research's conventional-burial estimate for a concrete vault or grave liner is $1,500–$3,000.

A grave liner is a simpler, less expensive version — typically a concrete bottom and sides with a loose-fitting lid, no seal, and no interior lining. Cemetery and construction costs vary; the research groups conventional concrete vault and grave-liner costs at $1,500–$3,000.

Both serve the same ground-settling function. The price difference reflects the liner's lack of sealing and interior finish, not a difference in structural performance. From an environmental standpoint, neither one biodegrades.

Why Green Burial Skips the Vault

Green burial is built on the principle that the body should decompose naturally and return to the soil. A concrete box directly contradicts that. It isolates the body from the aerobic soil zone where oxygen and microbial activity facilitate natural decomposition, creating instead an anaerobic environment that significantly delays the process.

At conservation and natural burial grounds, vaults are prohibited. The body is placed in a biodegradable container — an untreated wood casket, a woven casket, or a fabric shroud — and buried at 3.5 to 4 feet. The soil settles naturally over one to three years as decomposition proceeds. The cemetery manages this by mounding extra soil at burial and monitoring the site.

The settled grave eventually looks like the surrounding meadow or forest floor. That is the intended outcome, not a maintenance failure.

How to Get a Vault-Free Burial

Option 1: Choose a natural or conservation burial ground. These cemeteries do not allow vaults and are designed for vault-free burial from the ground up. GBC-certified sites are listed in the Green Burial Council's public directory.

Option 2: Find a hybrid cemetery with a vault-waiver section. Many conventional cemeteries have added "green sections" where they waive the vault requirement. Policies vary — some allow shroud-only burials; others still require a rigid biodegradable container. Call the cemetery office and ask specifically: "Do you have a section where we can bury without a vault or grave liner?" Get the answer in writing.

Option 3: Negotiate with a conventional cemetery. Some municipal and religious cemeteries will waive the vault requirement on request, especially for families with religious obligations (Jewish and Islamic burial traditions both require direct-earth interment without an outer container). This is not guaranteed, and the cemetery is within its rights to maintain its policy, but asking costs nothing.

The Cost Difference

Eliminating the vault saves $1,500–$3,000 directly. That alone brings a green burial's total cost closer to the $1,800–$6,000 range, compared to the $9,000–$20,000+ typical of traditional burial with a vault, embalming, and hardwood casket.

The vault is one of the largest single line items on a conventional funeral invoice, and it is also the item most families know least about when they are signing paperwork during the worst week of their lives. Funeral homes are legally required to provide an itemized General Price List to anyone who asks in person; cemetery vault policies are separate from that federal price-list requirement.

What About Ground Settling?

Families who choose vault-free burial should expect the ground to settle. This is normal, not a problem. The settlement is gradual — the surface dips a few inches over the first year, sometimes more depending on soil type and moisture.

Green cemeteries handle this routinely. Most add soil as needed during the settling period, and within two to three years the site stabilizes. Native grasses, wildflowers, or a memorial tree planted over the grave take root and hold the soil in place.

If the grave is in a hybrid section of a conventional cemetery, ask what the cemetery's protocol is for maintaining vault-free plots during the settling period. You want to know that someone will monitor and top off the soil rather than leaving a depression next to a row of vault-supported graves.

For families planning a green burial, the Green / Natural Burial Guide includes a cemetery evaluation checklist that covers vault policies, container requirements, and settling management — everything you need to ask before committing to a plot.