Related Topics

NZBC E2 – External Moisture is primarily focussed on a buildings’ external envelope being able to resist weather infiltration.

Acceptable Solution E2/AS1 also has some information on gutter sizing and durability, but these are also covered in E1 – Surface Water and B2 – Durability.

E2/AS1 also has some prescriptive solutions for structure regarding roofing spans which are omitted from B1 - Structure.

For clarity, this Code of Practice deals with the following topics discretely:

• Resistance to loads in  Structure.
• Durability covered in Durability 
• Gutter design covered in Roof Drainage.
• NZBC E2 Compliance requirements in External Moisture.
• Managing water ingress of metal roof and wall cladding in External Moisture — Cladding.
• Managing water ingress through flashings in Flashings.
• Managing weathertightness of penetrations in Penetrations.
• Managing Internal Moisture is covered in Roof Ventilation.