Greta75 -> RE: London fire: What we know so far about Grenfell Tower (6/14/2017 9:31:30 AM)
|
“A disaster waiting to happen,” is how the architect and fire expert Sam Webb describes hundreds of tower blocks across the UK, after the fire at Grenfell Tower in Kensington that has left at least six people dead. “We are still wrapping postwar high-rise buildings in highly flammable materials and leaving them without sprinkler systems installed, then being surprised when they burn down.” A recent £8.7m refurbishment of Grenfell Tower saw the building clad with “ACM cassette rainscreen” panels, an aluminium composite material covering insulation panels, which could have caused the fire to spread more quickly up the facade of the tower. “The issue is that, under building regulations, only the surface of the cladding has to be fire-proofed to class 0, which is about surface spread,” says Tarling. “The stuff behind it doesn’t, and it’s this which has burned.” 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.” “We have been very concerned about the introduction of highly combustible products into buildings,” he says. “They are often being introduced on the back of the sustainability agenda, but it’s sometimes being done recklessly without due consideration to the consequences. It’s not uncommon for buildings to have blocks of polystyrene up to 30cm deep on the outside, which is an extraordinary quantity of combustible material to be sticking on to a building. There are often ventilation voids between the rainscreen cladding and the insulation to prevent damp, but this also increases the spread of flames.” https://www.theguardian.com/uk-news/2017/jun/14/disaster-waiting-to-happen-fire-expert-slams-uk-tower-blocks
|
|
|
|