A Thunder Bay Roofing company has been fined after a worker was injured.

Lakehead Roofing will have to pay $50,000 for a violation of the Occupational Health and Safety Act.

In May 2012, a worker was using a fall-arrest system with a safety line while working on a project in Sault Ste. Marie. When the worker moved to another part of the roof to assist two others, he didn't adjust his lifeline.

Shortly after, a slab broke underfoot and the worker fell more than 14 metres before the fall system engaged. The worker suffered serious leg injuries.