Description

Roofs perform a critical function - they are the umbrella protecting the building from the outside environment, with a particular focus on protection from water. Good performance with only modest maintenance can be achieved with careful design, cladding selection and installation.

This BRANZ Facts series outlines the minimum performance requirements under the New Zealand Building Code, paths to compliance, the factors that influence the performance of roofs, roofing materials and common problems.

If a designer follows a Building Code Acceptable Solution for a roof cladding covered by the Acceptable Solution, they are deemed to have met the requirements of clause E2 External moisture.

Scope

In this Fact Sheet:

• New Zealand Building Code
• Key roofing aspects of E2/AS1
• Alternative roofing options
• Other compliance matters