A burial vault assembly includes a box that may contain a corpse. The box may be buried underground having the corpse being vertically oriented. Thus, the box occupies less space in a graveyard than a casket. A lid is selectively positioned on the box and the lid closes the box. A seal is coupled to the lid and the seal is comprised of a resiliently compressible material. Thus, the seal forms a fluid impermeable seal with the box when the lid is positioned on the box to inhibit decomposition gases from escaping the box.