Description
Cromar Protect 1F is a non-vapour-permeable (non-breather) membrane designed for use beneath slated and tiled pitched roofs. This high-performance underlay complies with BS5250:2021 standards, requiring appropriate ventilation, and should be installed following BS5534:2018 guidelines. It acts as an effective secondary barrier, preventing dust, rain, and snow from entering the roof void and offering temporary protection for up to three months before the primary barrier (slates or tiles) is installed. Lightweight and easy to handle, the membrane comes in a convenient roll size of 45m x 1m, simplifying transportation and installation.
Key Points:
- Bat-Friendly Design: Tailored for roofs with bat roosts.
- Standards Compliance: Requires ventilation per BS5250:2021 and installation per BS5534:2018.
- Protective Function: Shields against dust, rain, and snow as a secondary barrier.
- Ease of Use: Lightweight material with a convenient roll size for handling and installation.
For more information on Cromar, you can visit their website here.








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