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Originally Posted by papa smurf
Grenfell cladding was changed to cheaper version, reports say
Documents seen by BBC show contractors were asked to fit aluminium instead of more fire-resistant zinc, saving £300,000
Cladding proposed for Grenfell Tower during a multimillion-pound refurbishment was changed to a cheaper, less fire-resistant version to make a saving of less than 4% of the final cost of the project, according to reports.
Documents seen by the BBC show contractors working for Kensington and Chelsea council were asked in 2014 to use aluminium cladding instead of zinc, to save £300,000. The wider refurbishment cost £8.6m
The leaders of Kensington and Chelsea council have been accused of shameful behaviour after shutting down the first cabinet meeting since the disaster after attempts to block the media from the hearing failed.
https://www.theguardian.com/uk-news/...on-reports-say |
SO WHAT. The insulation was the problem. Zinc is NOT more fire resistant the Aluminium. Zinc panels come in FR and PE versions, as do Aluminium ones. BOGUS ISSUE. The plans specified Celotex FR5000 insulation, but it was Celotex RS5000 that was finally used and from one particular source it is 70% MORE expensive. So where are these cost savings meant to be? How is supposedly saving £2/sq m on the cladding meant to mean anything if you spend around £23/sq m MORE on the insulation.
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Detective Superintendent Fiona McCormack said; "The insulation was more flammable than the cladding. Tests show the insulation samples combusted soon after the test started."
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The chosen strategy is to wrap the building in a thick layer of
insulation and then over-clad with a rain screen to protect the
insulation from the weather and from physical damage.
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1 Insulation layer
Celotex RS5000 has performed well in a number of fire tests, but it is combustible. Made from polyisocyanurate (PIR), it releases toxic fumes such as hydrogen cyanide when it burns
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Well actually the FR(fire resistant) versions of the insulation AND cladding ALSO contain the same substance, just mixed in with other material(s). If would STILL give off toxic fumes.