Also look into a fire-resistant file cabinet.
The cost of a fire-resistant cabinet is usually higher than that of a standard unit, but the added cost is well worth the it for your peace of mind.
Also, the metal used in the roofing materials, which tend to be aluminum, steel and sometimes copper, are fire-resistant.
The records should be stored in a secure place, such as a safety deposit box or a fire-resistant safe or filing cabinet.
Drywall, or wallboard, is a sandwich of fire resistant gypsum between two layers of heavy-duty paper.