You are viewing 1 of your 1 free articles
Expert points to window extractor fans in updated Grenfell Inquiry report
An expert witness to the Grenfell Inquiry has highlighted survivor evidence about how flames entered their flats through kitchen window extractor fans.
Professor Luke Bisby, a professor of fire and structures at the University of Edinburgh’s School of Engineering, suggested in a newly updated report published today that extractor fans “were in many cases the first components of the window assemblies… to fail and fall away during the fire”.
In a new section in his report for the inquiry, Professor Bisby points to statements from former residents of Grenfell Tower, remarking that many “comment specifically on early failure (and/or ignition) of the refurbishment kitchen extract fan units as a route for fire and smoke ingress”.
He noted that this is particularly true for people who lived in flats with numbers ending in six – that is, people who lived directly above the flat where the fire started (flat 16).
And he drew attention to the number of residents who mentioned gaps around their windows and front doors which did not automatically close – which Inside Housing also highlighted last week.
Fire climbed rapidly up the external cladding in this part of the building before it began to spread sideways.
READ MORE
When the fire was smaller it was more likely to enter flats through products on the windows, Professor Bisby concluded, but that as flames grew they burst in through smashed glazing.
He also observed that there “is some visual evidence to suggest” that the first external part of the building to ignite may have been the kitchen extractor unit outside Flat 16.
And he said that “rapid failure” of the kitchen extractor fan in Flat 16 “is likely to have contributed to the ability of the external flaming to impinge on the ACM [aluminium composite material] rainscreen cladding located above the window”.
Professor Bisby’s earlier report said it was “less likely” that the fire first spread to the outside of Grenfell Tower via the section of the window including the extractor fan than the “internal window surround”.
However, his updated report states the two are “equally likely”.
New video evidence of the fire indicates that flames were “venting through the hole created by the failure and movement of the extract fan and infill panel”, he adds.
The kitchen window extractor fans – installed at Grenfell during the refurbishment works carried out by Rydon – were manufactured by Nuaire as part of its Cyfan range, and fitted with a Nuaire window mounting kit.
Nuaire still advertises the “aesthetically pleasing” Cyfan products on its website.
Professor Bisby said the extractor fans “appear to be constructed primarily from Polycarbonate/Acrylonitrile Butadiene Styrene (PCABS) plastic” – a combustible thermoplastic polymer which “softens and loses essentially all of its mechanical properties at temperatures as low as 88°C”.
He said the extractor fans are currently being tested at the University of Edinburgh, along with other products relevant to the inquiry.
Fellow expert witnesses Dr Barbara Lane and Professor Jose Torero have also suggested that fire could have entered flats through the kitchen extractor fans.
Nuaire has been contacted for comment.
The Grenfell Tower Inquiry
Closing statements
Day 85: victims' lawyers attack the fire brigade
Further expert evidence
Including some additional evidence from emergency call handlers, bereaved and relatives
Day 84: further evidence from survivors and relatives
Day 83: swift evacuation of tower possible if residents alerted
Day 82: initial fire was extinguished but then returned to the flat
Day 81: overheating fridge-freezer most likely cause of fire
Day 80: fire doors installed did not match product tested
Day 79: resident advised to stay put despite fire in flat
Day 78: insulation and cladding material below required standard
Day 77: molten plastic spread blaze down tower
Day 76: 'stay put' should be dropped when fire spreads across floors
Other witness evidence
Police, ambulance, gas suppliers, council, TMO and call room operators give evidence
Day 75: call room operators give evidence
Day 74: further evidence from TMO officers
Day 73: TMO boss failed to pass information to firefighters
Day 72: fire finally extinguished when gas switched off
Day 71: further questions over stay put advice
Day 70: the police evidence
The bereaved, survivors and relatives’ evidence
Day 69: video shows smoke billowing through fire door
Day 68: KCTMO removed self closing mechanism and never replaced it
Day 67: gaps in cladding fixed with duct tape
Day 66: 'don't fix broken system with a sticking plaster'
Day 65: survivor dragged disabled man down nine floors to safety
Day 64: KCTMO 'did not replace broken fire door'
Day 63: foam insulation inside cladding 'exposed' says survivor
Day 62: father gives harrowing account of son's death
Day 61: council’s management organisation slammed for faulty electrics
Day 60: stay put advice ‘led to deaths’, residents say
Day 59: residents describe problems with new windows
Day 58: survivor describes how daughter saved his life
Day 57: firefighter evidence ‘a slap in the face’, says survivor
Day 56: relations with contractor were ‘toxic’
Day 55: resident 'never happy' with stay-put advice
Day 54: tenant gives evidence about housing association
Day 53: stay put advice 'felt like trap'
Day 52: resident saved by son's phone call
The firefighters’ evidence
Day 51: firefighter feared encouraging residents to jump
Day 50: the LFB commissioner
Day 49: fire chief reveals frustration over lack of building plans
Day 48: internal fire spread 'bigger story' than cladding
Day 47: fire officer considered evacuating crews over building collapse fears
Day 46: 'we were improvising' senior firefighter admits
Day 45: firefighter urged for abandonment of 'stay put' policy
Day 44: firefighter recalls radio signal difficulties
Day 43: call hander 'uncomfortable' with insisting residents stay put
Day 42: residents only told to leave if they called fire brigade back
Day 41: breathing equipment delay 'hampered rescues on upper floors'
Day 40: chiefs told firefighters to abandon policy
Day 39: firefighters reveal dramatic rescue of children
Day 38: firefighters issue aplogies to families
Day 37: council 'unable to provide tower plans'
Day 36: QC defends inquiry process
Day 35: Javid would welcome interim recommendations
Day 34: water from hose 'too weak' to reach the flames
Day 33: 'oh my god, we've been telling people to stay put'
Day 32: further fire fighter describes lack of equipment and low water pressure
Day 31: 'incredibly difficult' task of recording information outlined
Day 30: struggle to maintain control over rescue operation described
Day 29: fire service 'overwhelmed' by survival guidance calls
Day 28: 'the building beat us'
Day 27: firefighters 'forced to abandon plans to reach roof'
Day 26: poor signage hindered rescue efforts
Day 25: water pressure left firefighting equipment 'like garden hose'
Day 24: decision to abandon 'stay put' explored
Day 23: TV images 'could have assissted' rescue effort
Day 22: description of hectic scenes in the control centre
Day 21: account from the fire service 'nerve centre'
Day 20: firefighter describes 'huge volume' of calls from trapped residents
Day 19: firefighter 'given no training on cladding fires'
Day 18: evacuation would have been 'huge catastrophe'
Day 17: firefighters describe access and lift issues
Day 16: scenes of carnage likened to 9/11
Day 15: firefighters recount trauma of survival guidance calls
Day 14: firefighters describe spread of blaze
Day 13: firefighters recall radio difficulties
Day 12: "it was like a war zone"
Day 11: questions raised over fire fighters' radios
Day 10: watch manager emotional under questioning
Day nine: lead firefighter 'not trained in stay put policy'
The expert reports: authors give evidence to inquiry
Day eight: where the fire started
Day seven: what was in the cladding?
Day six: the cause and spread of the fire
Day five: expert highlights key issues
Day four: firefighters defend response to fire
Day three: council and contractors appear for the first time
Day two: lawyers for the survivors make their case
Day one: expert evidence released on cladding and stay put
The commemoration hearings
30 May: Grenfell Council 'recognised it should not house disabled victim above four storeys'
29 May: Anger on day six of the Grenfell Inquiry
25 May: Grenfell families 'forced to live in chimney with stay put policy'
24 May: Grenfell family complained about father being housed on 17th floor
23 May: Tributes to children on third day of Grenfell hearings
22 May: Emotions run high as Grenfell bereaved shown footage of the tower burning
21 May: Grenfell victims share tributes as inquiry opens
