Metal Corrosion in NZ Buildings - Fact Sheet 3 (FS3) - Corrosion over the building envelope
- Metal Corrosion in NZ Buildings - Fact Sheet 3 (FS3)
- Version 2 - June 2021
- Valid from
- Information provider
- BRANZ Limited
- Information type
- Fact sheet
The risk of corrosion is different on different parts of the building envelope. Understanding this and specifying the appropriate metals and protective measures for the different locations will help ensure buildings and building materials have significantly greater durability and longer service lives.
Micro-environments over a building envelope are created by local weather and climate conditions, the type and levels of atmospheric pollutants and the geometry and orientation of buildings. In many cases (but not all), the corrosivity in exposed positions is slightly higher than or similar to sheltered positions.