Builders liability insurance holders have been told that workers are putting their lives at risk by working on dangerous home improvement projects.
Inspectors from the Health and Safety Executive (HSE) have shut down four building sites during a recent crackdown in Cardiff, according to WalesOnline.co.uk.
It reported that three of those sites were in one street in Cathays, where inspectors found builders working on roofs without hard hats, while scaffolding was also missing.
Liam Osborne, HSE inspector for Cathays, Roath, Canton and Cardiff city centre, said: "The number of unsafe property refurbishments currently being undertaken in the Cardiff area is of real concern. We had no choice but to take robust enforcement action to ensure that workers on site did not suffer significant injury or worse."
Recently, Delme L James was prosecuted after a construction worker from Carmarthen suffered life-changing injuries when he fell three metres from the roof of a farm building in April 2009.