A crunch meeting takes place today [Monday] after 600 Safestyle jobs disappeared overnight.
Hundreds of workers at the double-glazing firm’s Barnsley site were told to down tools and marched off site at 5pm on Friday [October 27].
At the same time, Safestyle suspended its share trading, locked its gates and told staff that it intends to file for administration.
Sources say the company received more than £10 million in orders last month, while thousands of pounds were spent on social media advertising on Friday alone.
Staff have been invited to a meeting on site at Valley Road, Wombwell, Barnsley, S73 0BS at 1pm on Monday.
Lee Parkinson, GMB Organiser said:
"Safestyle UK workers have been completely let down by mismanagement from the very top of the business.
"More than 600 workers have been cruelly cut off from work, weeks before Christmas, with no guarantee that they will even get last week's pay-check.
“The impact of this closure upon the community of Barnsley cannot be overstated. It is simply devastating.
"We need urgent answers on where the money has gone. GMB will be on site with our members on Monday to demand those answers.