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GIB Weatherline®: The Purple Plasterboard Wrapping Its Way Around Kiwi Building Sites

“If you want to make a statement, wear purple.”


It’s  a famous line attributed to former NBA basketball player Baron Davis, and a particularly apt way to describe GIB Weatherline®, the distinctive purple coloured fibreglass-faced plasterboard, which is making a bold splash across an increasing number of Kiwi building sites as well as providing an essential layer of weathertightness underneath exterior cladding.

GIB Weatherline® was launched in 2019 and is intended for use exclusively with drained and vented cavity cladding systems. Used as part of the wider GIB Weatherline® Rigid Air Barrier system, GIB Weatherline® functions as an air barrier and a secondary line of defence against water penetration into a building’s interior.

It has an advanced second-generation fibreglass liner on both front and back, with a highly modified gypsum core, containing water and mould inhibitors. This not only provides an excellent substrate for fire resistance applications, but it is also safe and easy to use for those handling and installing it, requiring no power tools to cut, saving time and money during the installation process.

Another key feature is being able to install it in unpredictable weather conditions. The temporary weather protection allows for up to 180 days of exposure to the elements so building work can commence inside. It also offers enhanced thermal efficiency of the building by reducing air leakage.

So not only is this highly innovative plasterboard making a powerful purple statement across New Zealand building sites, but it’s also providing some pretty good benefits too.


GIB Weatherline® Rigid Air Barrier Systems

GIB Weatherline® Rigid Air Barrier Systems are suitable for use in both residential and commercial buildings and have been tested for wind speeds up to and including Extra High wind zones. It has Building Research Association of New Zealand (BRANZ) appraisal and meets the NZ Building Code requirements for rigid underlays (rigid air barriers). 

GIB Weatherline® Rigid Air Barrier Systems can also be used to provide passive fire protection to meet fire protection requirements including options to limit vertical fire spread.


To find out more, visit GIB Weatherline® plasterboard and GIB Weatherline® Rigid Air Barrier Systems, where you’ll find detailed information as well as technical literature and manuals.

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