Introducing GypLyner Xternal


GypLyner Xternal

A through-wall solution that delivers tested fire and acoustic performances as well as a range of options for thermal performances for non-loadbearing steel framed infill systems (SFS)


Through rigorous testing and technical know-how, trusted partners, British Gypsum and Isover have combined to deliver a dependable system with design versatility at its core, GypLyner Xternal is a trusted solution with a wide range of clear, detailed fire, acoustic and thermal performance specifications, all supported by market leading technical evidence.


Our design, rigour and testing standards give you the certainty you need when developing large scale projects. Providing reassurance and delivering all the attention to detail and substantiated evidence you get from our internal systems, in an external offering, with a clear range of regulation & performance specifications to suit all your needs.


Why Specify GypLyner Xternal:

  • Systems designed to offer flexible specification options.
  • Meet and exceed thermal performance needs through a range of insulation solutions.
  • Comprehensive fire and acoustic tested solutions
  • Tested windloading data
  • Installation details for junctions, abutments, windows and deflection requirements.
  • BBA certification for Glasroc X Sheathing Board 12.5mm and Isover Polterm Max Plus


Specify GypLyner Xternal for:

  • Healthcare buildings
  • Education buildings
  • Offices
  • Commercial buildings
  • Retail and Leisure
  • Industrial buildings
  • Residential and Hotels

GypLyner Xternal Specification Selector

GypLyner Xternal Specification Selector
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Technical Support

Technical Support

Contact us for a u-value calculation

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Protecting the future of your building and its users

Protecting the future of your building and its users

View our SpecSure System Warranty

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External Walls Specification Selector

Head to our White Book Specification Selector to see how GypLyner Xternal will work for you.

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Learn more about GypLyner Xternal

Visit the system page for key facts, documents and CAD details.

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Download your GypLyner Xternal information

Click here to download the SFS pages from The White Book Specification Selector.

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Key Considerations

When specifying GypLyner Xternal, you need to satisfy yourself that use of the system meets all relevant national Building Regulations and guidance as well as local, national and other applicable standards relevant for your construction or application, including requirements in relation to fire and applicable height restrictions.

Please refer to the Isover Product Data Sheet, Safety Data Sheet, BBA and Declaration of Performance which are available at:

Please refer to the British Gypsum Product Data Sheet, Safety Data Sheet and Declaration of Performance which are available at:

The building detail is for illustrative purposes only. It does not constitute advice and should not be relied upon.

Steel Frame System (SFS)

GypLyner Xternal is tested with Hadley SFS. Test data for our specifications can only be used with defined Hadley Steel Framing SFS components. Please contact us through Technical Support to discuss working with other framing suppliers