Replacing a profiled metal roof - Build 196 (2023)

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Abbreviation: Replacing a profiled metal roof
Valid from: 1/06/2023

Information provider: BRANZ Limited,
Author: Alide Elkink
Information type: BUILD article,
Format: Website, PDF,

Description

Acceptable Solution B2/AS1 to New Zealand Building Code clause B2 Durability requires roof claddings to meet a minimum durability of 15 years. A profiled metal roof typically has a life expectancy longer than this depending on a number of factors such as environment, roof design, type and grade of metal used, quality of installation and maintenance.

How do you decide it is time to reroof a profiled metal roof? The answer is generally when the roof shows signs of corrosion and begins to leak.

Scope

This article covers:

Causes of corrosion
Options for reroofing
Roof pitch
Metal grades
Profiled metal roofing
Will a building consent be required?
Restricted building work
What may (or may not) be under the existing roof?
Consider opportunities for improvement
Maintenance and washing

For assistance with locating previous versions, please contact the information provider.

View on Information Provider website Download this resource (PDF, 413KB)

For assistance with locating previous versions, please contact the information provider.

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