"This section of road has had multiple layers of seal applied in the past, and it is now due for a full renewal."
He said the work was dependent on the weather and could be postponed at short notice.
Once that project was completed, contractors will move further up the highway to north of Norsewood, near the intersection with Jens Anderson Road.
Work on more than 20 sections of the highway in the district will also begin this month.
"[These sections] need just a new layer of seal rather than full rebuild, to keep them safe for use," Bang said.
"In some cases, this is a second coat seal, following a rebuild carried out last year. This is standard practice and ensures that there is a thick, durable and waterproof layer on these sections of road."
Crews had already been out and about in the district undertaking pre-seal repairs and patching at sites to be resealed over the coming months.
Work at Otanga, north of Dannevirke, was still on going.
The road was reinstated to two lanes recently, after it was reduced to one due to an underslip.
Bang said the new temporary layout was working well.
"The 30km/h speed limit remains in place through the site, and people are asked to abide with this limit for safety reasons."
Nationally, Waka Kotahi is planning to re-seal or re-build approximately 2450 lane kilometres of state highway, which is equivalent to 10 per cent of the entire State Highway network.