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Next generation roofing underlay offers superior air permeability and strong wind uplift resistance

Building products manufacturer Glidevale Protect has launched Viking Air, an air and vapour permeable (LR) roofing underlay for cold and warm pitched roofs. 

Air and vapour-permeable membranes are becoming an option of choice for specifiers due to the ability of the underlay to provide airflow and ventilation into the roof space of the dwelling.  Protect Viking Air delivers the solution to this requirement through class-leading air and vapour permeability.  This reduces the risk of condensation in line with BS 5250, without the need for additional ventilation, which is acceptable to the NHBC for a cold roof construction.

Viking Airs resistance to wind uplift ensures suitability for use in wind zones 1-4 at 345mm batten gauge to BS 5534, with no need to tape laps or use additional counter battens.  When the membrane is installed at 310mm batten gauge or on sarking, it also meets wind zone 1-5 requirements, ensuring unrestricted use across the UK and Ireland.

Tough and durable yet easy to handle, even in low temperatures, Viking Air offers a unique grid design to make precise cutting simple. The underlay can be laid straight over the ridge without cutting material short, and, because the membrane is hydrophobically treated, it provides water shedding properties and a high resistance to water penetration. The product is independently certified by BM TRADA.

We believe weve created a new era of air permeability performance and a game-changer with Protect Viking Air,” says John Mellor, Senior Product Manager, it adds a next-generation, technically advanced option to our portfolio. Were confident that whatever the specification, we have the complete solution or combination of products that give our customers the right mix of performance and value, every time.  Whatever the project, wherever the location Glidevale Protect has it covered.”

Viking Air forms an integral part of Glidevale Protects roofing membrane family.  This includes LR vapour permeable and airtight options, alongside impermeable HR underlays which can be twinned with Glidevale Protect ventilation products and accessories, giving specifiers and contractors a single source solution, whatever their pitched roof challenges.

To discover more about Protect Viking Air, visit, contact or 0161 905 5700 quoting Viking Air. Follow our Glidevale Protect LinkedIn page for all the latest news.

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Protect Viking Air vapour permeable & air open underlay

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Glidevale Protect is a division of Building Product Design Ltd.

Other subsidiaries include ventilation systems specialist Passivent and Kingfisher Louvres, manufacturer of aluminium louvres systems.

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