The company behind Pink Batts insulation is cutting jobs at its Christchurch plant to focus on its Auckland operations, says the manufacturing union.
The EPMU on Thursday said Tasman Insulation is axing 29 roles at its Christchurch site.
"This is yet another company who are saying they cannot compete with cheap overseas imports in the current economy," said EPMU construction organiser Ron Angel.
The union says Tasman has proposed two new roles in Christchurch while creating nine new jobs in its Penrose facility in Auckland, which will start operating 24 hours a day, seven days a week.
The company says it is committed to New Zealand-made Pink Batts, but the union says the future is uncertain.
"We have no guarantees they'll be able to do that unless the (NZ) dollar comes down and our manufacturing industry gets some support from the government," said Mr Angel.
The union says Tasman has offered to help redundant workers relocate or find other roles in its parent company, Fletcher Building.
The company said it is consolidating operations in response to changing market conditions and a reduction in demand for insulation.