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Protect FCM 750 floor cassette membrane

Protect FCM 750 floor cassette membrane is a vapour permeable air barrier specifically developed to maintain the integrity of the airtightness system at difficult intermediate floor junctions.

The product is entirely water resistant and airtight through the membrane itself yet remains highly vapour permeable to minimise the risk of harmful condensation forming at the vulnerable edges of the floor cassette. Protect lap and sealing tapes are also available separately to provide the correct seal to the internal air and vapour control layer.

Features & benefits

  • Highly vapour permeable in excess of the minimum value required for wall membranes.
  • Completely water tight and airtight.
  • 2 roll widths for standard, deeper or acoustic floor cassette types.
  • Can be used as a temporary weather protection.
  • Suitable for use in other applications where airtightness is required but without vapour control.
  • UKCA and CE marked.



Range Brochure


Product Brochure


Specification clause


Fixing instruction


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Have a question?

For any questions or queries about our product ranges and the technical support services we can offer, please contact us using the form below.

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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