Company directors and supervisors could face charges brought by the Queensland Worplace Health and Safety Department after three employees were electrocuted in 2009 and 2010.
The three men were killed while installing foil insulation under the federal government's multi-billion dollar Home Insulation Program.
State Coroner Michael Barnes handed down his findings into the deaths yesterday.
He referred Christopher and Richard Jackson, former executive directors of Arrow Property Management, for potential breaches of the Electrical Safety Act.
Christopher Jackson will also be investigated for alledgedly giving false evidence during the inquest while Ben McKay will be investigated to determine if he breached safety laws.
The coroner condemned the scheme for being rolled out too fast, and for a lack of employee training.
"It needed to be rolled out a lot slower and not at the expense of human lives," Barnes said.
"The dangers should have been foreseen before three people died in Queensland and a fourth in NSW."
Barnes was particularly critical of subcontractors for using metal staples instead of plastic staples simply because they were faster and easier to use.
He recommended complusory installation of electrical safety switches in homes and called for Fair and Safe Work Qld to undertake an electrical safety review of ceiling insulation work in that state.
This is in addition to an education campaign to warn householders of the electrical dangers present inside roof cavaties.
