Quarry workers for construction giant Fletcher Building were demonstrated for more pay outside the company's quarry on Hunua Rd this morning.
The Winstone quarry workers started their protest, calling for a pay increase and shorter hours, at 5am.
First Union spokesperson Bryce Hamilton said the company wasn't offering workers enough to keep up with the cost of living.
"Workers clock long hours to earn enough to live on. Rent prices are going up and up, but wages are stuck."
Fletcher Building, however, said it valued its quarry and transport workers highly.
Last month, the quarry workers staged a one-day walk-off to protest against their pay and conditions.
"Quarry work can be dirty and dangerous and the workers' site is classified as 'high hazard' by Worksafe. This isn't easy work and the workers deserve recognition for that," Hamilton said.
First Union is also taking legal action against the company for offering workers individual agreements during collective agreement negotiations. The union claims the company's actions have undermined collective agreement negotiations.