What is the primary function of draftstopping in fire safety?

The primary function of draftstopping in fire safety is to partition concealed spaces to restrict fire spread. Draftstopping is crucial in controlling the movement of smoke and heat in the event of a fire. By creating barriers within concealed or hidden spaces, such as those found in walls, ceilings, and floors, draftstopping helps to limit the pathways through which fire and smoke can travel. This partitioning effectively contains the fire to a defined area, giving occupants more time to evacuate and helping to protect other sections of the building from being compromised by fire.

While eliminating air leaks can contribute to fire safety by reducing the potential for smoke spread, its main purpose is not related to fire containment. Similarly, enhancing sound insulation and improving thermal efficiency are important aspects of building design but do not pertain directly to the primary purpose of draftstopping in a fire safety context. Thus, the focus on restricting fire spread makes the correct choice particularly relevant in discussions of fire prevention and safety measures.