Abercorn Homes of Hobson Industrial Estate, Burnopfield, Tyne & Wear, was found guilty of two breaches of the Work at Height Regulations (2005), following an inspection by the Health and Safety Executive (HSE).
HSE inspector Michael Brown said: "Three workers were observed by a HSE inspector carrying out additional cladding work on the roof of the building, about four metres from ground level.
"Edge protection had not been provided for the eaves of the building, which were approximately 50 metres long, although it had been provided on the gable ends of the building.
"In addition, a scissor lift had been inappropriately used to gain access to the roof and modified to carry materials."
