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  Roof Design

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.

These fact sheets outline 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.

The factsheets cover:

  1. Compliance
  2. Performance influences 
  3. Roof materials
  4. What can go wrong with roofs