A fire cavity barrier is a form of passive fire protection that falls under the banner of compartmentation – which refers to the ability to restrict a fire to a specific section of a building to give people more time to escape the building and...

To understand what a cavity barrier is, we must first define what we mean by a ‘cavity.’ In a home a cavity is an enclosed space usually found within a wall or enclosed by structural beams that serves no practical purpose. In an external wall a cavity can potentially function like a chimney facilitating the movement of flames, gases and smoke to other parts of the building. With cavities now understood it is important to have a clear definition of a cavity barrier.