Unfaced fiberglass batt insulation used as fire blocking shall fill the entire cross-section of the wall cavity to a minimum height of how many inches measured vertically?

• A. 12
• B. 14
• C. 16
• D. 18

Answer: (C)

The requirement for unfaced fiberglass batt insulation used as fire blocking to fill the entire cross-section of the wall cavity to a minimum height of 16 inches is grounded in fire safety standards. This specific height ensures that the insulation effectively blocks the passage of fire and smoke within wall cavities.

By filling the wall cavity to this height, any potential openings or gaps where flames could spread or where smoke could travel are minimized, thereby enhancing the overall fire resistance of the structure. This is particularly important in preventing fire from moving from one area of a building to another, which could lead to more extensive damage and pose a greater risk to occupants.

Adhering to this minimum height is critical in meeting fire safety codes and standards, thereby protecting both the occupants of the building and the structural integrity of the property. This requirement is thus a clear embodiment of effective fire blocking practices in building construction.