Which type of framing poses a major hazard due to the rapid spread of fire through chases from floor to floor?

Balloon framing is a construction method that can present significant fire hazards due to the way it channels flames. In balloon framing, the wall studs extend continuously from the foundation to the roof, creating vertical spaces or chases that allow fire to travel rapidly upward between floors. This design means that if a fire starts in a lower level of the building, it can easily move through these vertical spaces and spread to upper floors quickly, often before the occupants are even aware of the situation.

Because of the continuous nature of the studs, any gaps or openings in the walls can provide a direct pathway for fire. This method contrasts with platform framing, where each floor is built as a separate platform; in this case, fire would be contained more effectively at each level. Understanding the risks associated with various framing techniques is crucial for home inspectors when assessing fire safety in residential buildings.