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Originally Posted by denphone
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elephant in the room is the flammability of insulation panels
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A recent £8.7m refurbishment of Grenfell Tower saw the building clad with “ACM cassette rainscreen” panels, an aluminium composite material covering insulation panels,
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He says he recently inspected a new-build eight storey block in south-east London where there was no fire protection in the external cavity walls. “The insulation behind the external cladding is flammable polyurethane. I know because I took a chunk out and burned it.”
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So as I keep saying, the insulation is the real problem and there are no signs of that being removed on other buildings, eg Premier Inn, Brentford(same stuff used there). Just because there was a change to the make and type of rainscreen panels, the focus has been misdirected on them.
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“The issue is about compartmentalisation,” he says. “Whatever cladding system you use, you have to incorporate fire stops at the line of each floorplate and every party wall around a dwelling to prevent fire from spreading up the facade. The current regulations are robust enough, but they have to be properly followed, and the architects drawings properly executed on site.
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From the published plans, although there may be later unpublished ones, the regulations may not may been properly followed. From the list of the planning documents the full overcladding plans were deleted some time ago. Even if the plans were incorrect, I would have expected enough other people with routine experience of installing the cladding, to have some idea about the regulations and see that they might not have been followed at the time.