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Protect VP200 vapour permeable underlay

Protect VP200 is a medium weight, vapour permeable and completely airtight roof underlay with a vapour resistance exceeding the requirements of BS 5250, helping to avoid the risk of harmful condensation. It is suitable for use as a secondary line of defence against wind driven rain and snow across all pitched cold and warm roofs, including fully supported applications.

Features and benefits

  • Vapour permeable with a performance that exceeds the requirements of BS 5250.
  • UV and heat resistant.
  • Tough and durable.
  • Easy to cut and handle.
  • Suitable for wind zones 1-2 at 345mm batten gauge to cover a large area of England and Wales, in accordance with BS 5534.
  • Resistance to wind pressure – 1022Pa, tested to BS 5534.
  • Helps to avoid condensation risk in the roof space in accordance with BS 5250 and NHBC requirements.
  • Produced in the UK.
  • Forms part of a cold roof solution with both ventilated ridge and hip systems – Fulmetal UniRoll or RediRoll.
  • Fully independently certified by BM TRADA.
  • UKCA and CE marked.



Range Brochure


Product Brochure


NBS Specification

View specification

Specification clause






Fixing instruction


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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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