How do we protect the underside of a stairway?

To ensure safety and comply with fire and building codes, the underside of a stairway typically requires a specific type of fire-resistant material. Enclosing the underside with a minimum of 1/2 inch gypsum board effectively provides the necessary level of fire resistance, helping to prevent the spread of fire and smoke through concealed spaces. This thickness is recognized in various building codes as providing adequate protection for structural elements that support stairway construction.

Utilizing gypsum board of this thickness balances the need for fire safety with practical installation requirements. It is critical to follow these guidelines to meet local regulations and enhance the overall safety of the building. This consideration ensures that if a fire were to occur, it would be contained longer in the area where it originated, providing occupants more time to evacuate and reducing potential damage.