Bill Rogers, co-chair of the TEU NorthTec branch, has been working at the polytech for 21 years and teaches Diploma in Architectural Technology.
He said members, who are looking for a 3 per cent pay rise, had not received any better offers from NorthTec.
"As a whānau we are a very strong cohort with a very determined goal in mind. We're very disappointed with NorthTec's non-response to our bargaining requests," he said.
He said that non-response had led to tutors stepping up their action. "It's eight or nine years since we've had a strike at NorthTec and we do not like striking. We have heard of other institutions that had settled very quickly and NorthTec is the last institution which has not settled."
NorthTec chief executive Wayne Jackson was not available for comment yesterday but last week he said the polytechnic remained open to engage with staff when industrial action ended.