Following the disastrous fire at Grenfell, it was reported that the intumescent cavity closers, installed as part of the external elevation, were the wrong way around. This meant that the under-fire barrier could not react to the fire in the right way and close the cavity to prevent it from moving upwards throughout the building. This mistake throws into question how it actually happened, if the fire protection or cladding company were qualified and doing their jobs competently, and whose responsibility was it to check the sub-contractors’ work?
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