The Guardian newspaper reported Friday that contractors installed a cheaper, less flame-resistant type of paneling in the renovation that ended in May 2016.
Previously, the Metropolitan Police had confirmed 30 people had been killed in the inferno; the announcement Saturday almost doubles that number. Wherever we can, we will bring people to justice if there is evidence.
Perovic said cladding need not pose a fire risk in Canada if companies comply with existing building code rules, but added it's typically impossible to tell if a finished structure falls short until trouble strikes.
At least 20 tower blocks across the capital, ranging from 11 to 23 storeys, are believed to have the same cladding used at Grenfell, according to Construction Enquirer, a trade publication.
In a blog post written previous year, the Grenfell Action Group warned of "dangerous living conditions" in the tower.
"The scale of this tragedy is clearly proving too much for the local authority to cope with on their own", Khan said in an open letter to Prime Minister Theresa May. The British government has announced a 5 million-pound ($6.3 million) emergency fund for the victims.
Labour leader Jeremy Corbyn said that the council had seemed to "lack the resources to deal with a crisis of this magnitude", despite being the country's "wealthiest borough".
"There is a feeling from the community that they've been treated badly because some of them are poor", Khan said on Sunday.
Metropolitan Police Commander Stuart Cundy said the figure included the previous death toll of 30, reports the Independent.
Police have opened a criminal investigation into the circumstances of the blaze.
Kensington and Chelsea Council has faced widespread criticism for its handling of the disaster, with residents complaining that officials had provided little support or information.More news: Jury in Bill Cosby sex trial asks for definition of reasonable doubt
Hands cautioned Sunday that investigators still don't know exactly what cladding was used when the building renovation was completed past year.
Aluminum composite panels essentially consist of two thin layers of aluminum sandwiched around a lightweight insulating material. The building was gutted in a blaze early Wednesday morning that has also left dozens missing and hundreds of others homeless. Working in tandem, the air barrier and the cladding help prevent moisture from seeping into the buildings.
The International Building Code calls for the use of fire-resistant cores in buildings over 40 feet (12 meters) tall to slow the spread of flames. "We are now seeing buildings taken down by some very minor initiating events, such as a discarded cigarette setting fire to leaf litter, and that fire is able to get into cladding, voids and the structure of the building". It did not address the exact makeup of the panels.
He says it may be necessary for numerous outmoded tower blocks built in the 1970s to be demolished because of safety concerns.
Families searching for loved ones have blanketed the area near the tower with posters.
Almost 110 families made homeless from the blaze are being housed at hotels in west London.
Numerous displaced are living in churches and community centers.
Queen Elizabeth II and Prince William visited an aid distribution site Friday for the tower's residents and met with volunteers. Police said 19 injured in the fire remain hospitalized, including 10 who were in critical condition.
"When you have a fire that takes hold like that, that is literally an inferno". A special service was held Friday afternoon at the al-Manaar Muslim Cultural Heritage Centre to pray for the victims - and for the families waiting for news.
A lawyer for the family told CNN that Trevisan spoke with her parents before she died, telling them: "I am going to heaven".