The research showed that, on average, each tradesperson completes 5.29 hours of unpaid work a week, totaling 275 hours a year and equivalent to around £1,702 in wages (based on a minimum wage).
DLFB claims that more one in ten (11%) of the UK's 2.8 million tradesperson-strong workforce, claims to complete over ten hours of unpaid work each week.
The study also showed that nearly half (48%) of UK tradespeople work over 40 hours a week.
Jazz Gakhal, head of Direct Line for Business, said: "Tradespeople are the unsung heroes leading the way in nursing our economy back to health. The research shows that, despite the sometimes negative publicity that surrounds the work ethic of tradespeople, they are doing more than their fair share and setting the right example for the rest of the UK's workforce."