What is the term for the open space between the ceiling of the top floor and the underside of the roof of a building?

The term for the open space between the ceiling of the top floor and the underside of the roof of a building is referred to as a cockloft. This space is significant in the context of firefighting because it can serve as a hidden area for fire to spread, especially in older structures where construction methods might allow for significant airflow and fuel sources. Understanding the characteristics of a cockloft is crucial for firefighters, as it can impact ventilation strategies and overall fire behavior within a building during an incident. This term is commonly used in building construction and firefighting to ensure effective communication about building features and potential hazards.