BU631 How micro-environments affect material performance (2018)

BRANZ is monitoring sun, rain, wind and wind-blown sea salt in different positions on a building envelope. These conditions help to create a variety of micro-environments over the building that can be very different from the surrounding atmospheric environment.

This bulletin reports on the first monitoring of how micro-environments affect material performance on a BRANZ test building near Wellington.

This bulletin covers: 

• testing and the test building
• temperature
• time of wetness
• wind-driven rain
• salt deposition
• UVA irradiation
• corrosion rates of mild steel coupons
• corrosion rates of mild steel nails in timber.