Protect VP300 vapour permeable underlay
Protect VP300 is a medium weight vapour permeable roof underlay with a vapour resistance better than that required by BS 5250 to help reduce the risk of harmful condensation in the roofspace. With a strength greater than many other underlays in its class, Protect VP300 is suitable as a secondary line of defence against wind driven rain and snow for all pitched roofs, including fully supported applications.
Glidevale Protect has created two handy visual technical guides to help you choose the correct ventilation strategy for your projects:

Features & Benefits
- Easy to cut and lightweight to handle.
- Completely water and airtight with >2.0m head of water resistance.
- UV stable and heat resistant.
- Good all round performance for its weight and one of the best in its class.
- Suitable for use in Zones 1-3 at 345mm batten gauge, without the need for additional sealing tapes.
- Can be used as temporary roof covering.
- Resistance to wind pressure – 1198Pa, tested to BS 5534.
- Fully independently certified by BM TRADA.
- UKCA and CE marked.
