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Grenfell: Celotex marketing boss denies knowledge of RS5000 fire test change

Paul Evans

The former head of marketing at Celotex has denied knowledge of a key change made to a testing rig that allowed its combustible RS5000 insulation product to pass a BS 8414 test, despite assertions from his former colleagues that he signed off on the decision.

The Grenfell Tower Inquiry heard evidence from former Celotex product manager Jonathan Roper on Monday (16 November) that after a failed BS 8414 test in February 2014, Celotex added a 6mm magnesium oxide board combined with an 8mm Marley Eternit cladding panel adjacent to the fire barriers on the test rig, with thicker 12mm Marley Eternit cladding panels used on the remainder of the rig.

Roper said he was “fully aware at that stage that the rig was being overengineered to achieve a pass”.

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