The roof is usually the first thing to fail when a building is damaged in a severe storm. This risk can be minimised by making sure there are good structural connections.
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A high proportion of residential buildings use timber nail-plated roof trusses to form the roof structure. NZS 3604:2011 includes provisions for their use.
Good roof system design is a critical part of a good building. A roof designer must consider cost, performance and appearance, but it’s important to keep a few other factors in mind.
What is the cost of a roof cladding over its life? What is its environmental impact? The BRANZ website has a spreadsheet tool that has the answers for residential claddings.