What is a common material used in construction for vaults?

Concrete is a common material used in the construction of vaults due to its durability and strength. Vaults are designed to protect caskets from environmental factors and potential damage, and concrete provides the necessary structural integrity to achieve that. Additionally, concrete is resistant to water and pressure, which helps preserve the casket and remains over time.

While wood, plastic, and metal can also be utilized in various aspects of funeral service products, they are not as widely used for vault construction compared to concrete. Wood may not offer the same level of long-term durability and weather resistance, plastic may lack the necessary structural strength, and while metal vaults are produced, they are less common than concrete options. Thus, concrete remains the predominant material for this purpose in the industry.