Tuggerah Lakes Police have confirmed a man has died during an Industrial Accident at Wyong.
The 57-year-old was assisting with the dismantling of a shed, or paint booth, where he was required to be on the roof of the premises.
Police say part of the roof was made from Alsynite, which the man fell through.
It's understood he plunged from a significant height, landing on the concrete below and sustaining severe injuries.
First aid was administered and Emergency Services attended including the Westpac Rescue Helicopter, however the victim suffered Cardiac arrest and was declared deceased at the scene at 12.20pm, 7th May 2017.
Police and Work Cover are investigating.