Roof Ventilation - Fact Sheet 1 (FS1) - Roof space ventilation in New Zealand houses
- Roof Ventilation - FS1 - Roof space ventilation in NZ houses
- Valid from
- Information provider
- BRANZ Limited
- Information type
- Fact sheet
New Zealand houses have become more airtight, and there is evidence that this trend extends to the roof space as well. Without proper management of indoor moisture in buildings that are more airtight, mould growth can be a significant issue.
Roof space ventilation lowers the risk of potential problems such as mould growth. Openings are designed in the building envelope that will allow the exchange of moist roof space air with fresh air from the outside.