Another study warned that people had died because of fire or smoke spread in concealed spaces and “the potential risks and the potential losses remain high”. Inquiry investigations have also found that cavities and vertical channels in Grenfell’s new cladding system were probable contributors to the rapid vertical fire spread.
One study said that “poor workmanship with inappropriate materials are the main reasons for the inadequate protection of concealed spaces”. It said: “Whilst these concerns have not been disputed by manufacturers there are no drivers to encourage more effective solutions to be developed.” It warned that “inadequacies cannot be seen by the building users and will not be apparent during everyday use” and “will only become apparent during a fire”.
Grenfell United, which represents survivors and bereaved families, said the reports showed “people and organisations that were meant to keep us safe knew the dangers and didn’t care enough about our lives and the lives of our loved ones to act”.
“The scale of complacency is numbing,” said a spokesperson for the group. “It is deeply concerning that the government has held back information like this for over 18 months since the fire. This is vital safety information that needed to be in the public domain but seemingly was ignored or suppressed for convenience.”