cavity barrier

fire stop

fire stop
In a concealed, hollow construction, a material or member which fills or seals the open construction to prevent or retard the spread of fire.
References in periodicals archive ?
If the voids are not broken up with cavity barriers, then extreme heat can quickly spread upwards through convection in the 'chimney effect', spreading the fire upwards far faster than if the voids were separated with fire-rated material at specified intervals.
What we need to consider is how it performs as a system - it's the cladding, it's the support system, it's the insulation, it's the cavity barriers, it's all of these things combined that determines what happens in a fire.
If the voids are not broken up with cavity barriers then extreme heat can quickly spread upwards through convection in the 'chimney effect', spreading the fire upwards far faster than if the voids were separated with fire rated material at specified intervals," he said.