What must be covered when a new roof covering creates a combustible concealed space over wood shingles?

When a new roof covering creates a combustible concealed space over wood shingles, it is essential to address the potential fire hazard that this space might present. All the specified materials—gypsum board, mineral fiber, and glass fiber—play a critical role in fire safety and prevention in this context.

Gypsum board is widely known for its fire-resistant properties, providing a barrier that can help inhibit the spread of flames and reduce heat transfer. This makes it effective in making a concealed space safer by creating a fire-resistant barrier.

Mineral fiber, often used in insulation, is also non-combustible or has limited combustibility, contributing to fire safety by not easily igniting and potentially slowing down the spread of fire.

Glass fiber, similar to mineral fiber, is non-combustible and can be utilized for insulation and fire protection, enhancing the safety of enclosed spaces in buildings.

By requiring coverage with any of these materials, building codes and safety regulations aim to minimize the risk associated with combustible concealed spaces. Utilizing a combination of such materials ensures that even if one fails to adequately prevent combustion, the others provide an additional layer of safety. This multifaceted approach is why all the listed materials are considered valid options for covering the potentially hazardous space created by a