Angela Morris, chairman of Berkhamsted Fairtrade Steering Committee, hopes bunting will be 4,350 metres long by the end of the task on March 28.
That will be at least 12,500 flags, stretching for 1,654 metres more than the current world record.
Yesterday Angela held a Big Brew Coffee Morning at The Court House, Church Lane, Berkhamsted, where town mayor Julie Laws was among those helping with bunting.
There is another chance to decorate a piece of Fairtrade cotton bunting at Berkhamsted Market on Saturday morning.
Meanwhile, vouchers for half price cups of Fairtrade tea were given out at Tring’s Farmers Market in Brook Street on Saturday.
The stall was run by the Tring Justice and Peace Group.
Michael Demidecki, from the group, said: “A lot of people were interested to learn about Fairtrade.”
Visitors to the stall were given 50 per cent off vouchers to use at Fairtrade outlets in the town.
The stall also promoted the Fairtrade Foundation’s Margaret Demidecka award, which is in memory of Mr Demidecki’s wife, and recognises schools who fundraise for Fairtrade.
> Fairtrade Fortnight runs until March 13. Are you planning events for it? Contact us - our details are on page two.