Dortech chairman Steve Sutherland told the that he had to wait up to 200 days for Balfour Beatty to pay his invoices.
Dortech鈥檚 stance follows a call earlier this week from for suppliers to boycott late-paying major contractors.
Mr Sutherland said his boycott of Balfour Beatty will cost him 拢5m of Dortech鈥檚 拢12m annual turnover but if he continued working for Balfour Beatty there was too much聽risk of going out of business altogether.
鈥淲e鈥檝e done 80 projects for them so this hurts us a lot,鈥� he said. 鈥淚鈥檇 love to work for them again but we just can鈥檛 take the risk.鈥�
A Balfour Beatty spokesman told the newspaper that the company was 鈥渃ommitted to its supply chain and is at the forefront of government and industry initiatives supporting the well-being of our suppliers鈥�.
Balfour Beatty signed up to the in 2010.
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