Fire barrier
PAS 9980:2022, Fire risk appraisal of external wall construction and cladding of existing blocks of flats – Code of practice, published by BSI Standards Limited in 2022, defines a fire barrier as a: ‘separating element that exhibits fire integrity or fire stability or thermal insulation, or a combination thereof, for a period of time under specified conditions.’
It suggests that a cavity barrier is a: ‘…fire barrier specific to concealed spaces (cavities) within the external wall.’
See also: Cavity barrier.
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