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 ?

CAVITY BARRIER GAPS Inadequate material too small to halt fire spreading

Refurb 'turned Grenfell tower into a death trap' Original 1970s block well built to avoid risk of fire spreading in flats; Botched facelift to blame for all 71 deaths, claims report by expert

"Rather, the Prohibition Order results from an oversight in regards to the installation of the horizontal cavity barriers behind the cladding.

change in the law can mean fire risk; Mayor speaks out on how building inspection changes are blamed for scandal

The reality is that a whole range of factors affect the fire performance of a facade, including design of cavity barriers, fixings used and cavity width.

Addressing Fire Safety -- Kingspan Insulation's Andrew Pack interview

Ms Barwise added: "The combination of this highly combustible material and omissions of cavity barriers amounts to a collection of catastrophic failures in construction safety."

The council instigated & oversaw tower block death trap; THE GRENFELL INQUIRY: WHO FACES THE BLAME?

The windows lacked fire resisting cavity barriers and were surrounded by combustible material, meaning there was a "disproportionately high probability" of fire spreading to the cladding, she added.

'Stay put policy failed after 30 minutes at Grenfell'

It adds: "Where the ACM rain screen panels are missing, there is no evidence of cavity barriers, a requirement designed to stop the vertical and horizontal spread of fire within the cavities." The report says there was concern about some fire doors, and adds: "One door has been cut back to the point where the fire-preventing qualities have been compromised and the door still does not close."

Flats to be evacuated amid fears of another Grenfell; external cladding among 'serious issues' that need urgent repairs

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.