A fire completely destroyed the powder drying room at Blast and Coat on Millers Rd, Dannevirke, at about 7am on Tuesday morning, May 10.
Six fire appliances and five support vehicles attended the incident - some from Woodville, Norsewood and even as far away as Napier, as the building was an industrial site.
The building was old but it housed sophisticated equipment which has all been destroyed.
The cause of a fire at commercial premises in Dannevirke is being investigated.