A Batley labourer suffered catastrophic injuries on his first day at work.
An inquest jury returned a verdict of accidental death caused by inadequate safety measures.
Tom Whitmarsh, then 21, fell 30ft through a hole in a roof just 10 minutes into a new job. He was working at the Menai Shopping Centre, Bangor, north Wales, for a roofing contractor.
The jury heard he suffered a traumatic brain injury, lost the sight in one eye and the hearing in one ear, and had multiple fractures. The injuries led to his contracting meningitis and epilepsy.
After a seizure in November 2009, he had a heart attack and died at the
age of 24.
Tom's father Bob said: "We are relieved the inquest in Bradford is now over but the fact remains that nothing can bring him back to us.
"We were just coming to terms with Tom's condition when he died. We only hope that lessons can be learned from his story."
The Health and Safety Executive is investigating measures taken at work by the the contractors.