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Vapour impermeable & airtight underlays

Glidevale Protect offers a range of vapour impermeable, or high resistance (type HR), roofing underlays which prevent the diffusion of water travelling the material. These airtight underlays are designed as an alternative option to overcome the disadvantages of traditional 1F felts. To avoid the risk of interstitial condensation forming, additional ventilation will always be required with a HR underlay.

Click here for details of our 15 year product warranty for roofing underlays and ventilation used as a system with solar applications.

Our collection includes

Protect A1 Solar

Protect A1 T3 Plus underlay

Protect A1® underlay

Protect Wunderlay® underlay

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Contact us today to discover more about our extensive range of building product solutions and the technical support services we can offer.

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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.

Important Notice

Please be vigilant of fraud/cyber crime. If you receive an email from our parent company Building Product Design Ltd, please check that the email address from the sender ends in '' and any phone number given is 0161 905 5700.

If you receive any emails ending in '' or '', these are NOT legitimate, and you should contact us as soon as possible at

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