Exceptions that would be considered are for genuine health reasons such as disposal of dead stock or cultural reasons such as tangi, but residents still need to apply.
There is no cost to apply for an exemption and it would involve inspectors visiting the site to check the activity was safe. Applications would be considered on a case by case basis.
Mr Horn said most people would understand the need for the ban and there had been a couple of close calls over the past week including a fire at Waikite Valley and one at Ngapuna which had the potential to be quite dangerous.
He said the dry conditions combined with high wind could increase risk even further.
Mr Horn said anyone wanting to lay a hangi needed to contact the council as soon as possible, especially with Waitangi Day coming up.
Tourism operations weren't likely to be affected as most used gas. Any doing traditional hangi with wood should contact the council to have it approved.
Mr Horn said he had been working with Raggamuffin organisers but said they would not be affected.
The fire ban applied to anything that used wood or charcoal for burning.
He said fish smokers were "probably okay" if they were fully enclosed but people needed to contact the council before using them to check.
The decision has sparked plenty of debate on The Daily Post Facebook page - with more than 40 comments by late yesterday afternoon.