The 42-year-old had been sub-contracted by the Stranraer-based groundwork company to carry out roof repairs on a barn at Whiteley’s Farm on May 24, 2016.
He suffered a compression fracture of the lower back when he stepped on a translucent light panel which broke under his weight resulting in his falling through the roof to the ground below.
An investigation by the Health and Safety Executive (HSE) found that McKeown Groundworks Limited failed to adequately supervise this work at height and relied on the experience of the workers to avoid injury while working at height.
McKeown Groundworks Limited whose registered office is at King Street, Castle Douglas pleaded guilty to breaching Regulation 4 of the Work at Height Regulations 2015 at Stranraer Sheriff Court and was fined £12,000.
HSE Inspector Helen Diamond said: “McKeown’s failings resulted in serious injuries which could have easily been prevented had the company planned the work at height.
“Planning the work at height would have included an assessment of the risks and ensuring that suitable and sufficient measures were in place to prevent falls from height.
“Work at height is the biggest single cause of fatal and serious injury in the construction industry, particularly on small projects.”