Burial vaults are an accepted means of enclosing the casketed remains of a loved one within a grave. The purpose of a burial vault is to maintain the grave from the effects of settling as well as protecting against outside forces of water or extreme weight of the earth.
Wilbert vaults are manufactured of strong reinforced concrete which then are lined with a variety of selected plastics and metals in order to assure the utmost durability and peace of mind.
In most areas of the country, state or local law does not require that you buy a container to surround the casket in the grave. However, many cemeteries require that you have such a container so that the grave will not settle year after year. Either a grave liner or a burial vault will satisfy these requirements.
By definition a burial vault is a lined and sealed unit that is specifically engineered to support the weight of the earth above the grave as well as the heavy equipment that passes over it.
The weight of the earth and the heavy equipment used to dig graves far exceeds what an unprotected casket can withstand. A burial vault made of specially formulated, reinforced concrete is designed to support these elements and more. Concrete becomes stronger as it continues to cure long after being placed into the ground. In other words, a vault buried years ago could actually be stronger today.