Product Overview
This is our traditional reinforced kraft paper bitumen-bonded building paper laminate used within the construction industry which meets the requirements of BS 1521, grade B1F (Class B with reinforcement).
Unlike many other recent developments in building membranes (eg breathable roof underlays), BS 1521 does not give guidance on suitable use, and as such this product is a generic material, serving a wide range of end-user defined applications.
However, typical usage for B1F has naturally evolved over time including for example, separation layers for insulated screeds, bond breaks, temporary protection and gardenbuildings.
Key Features
- Bitumen, paper and reinforcement scrim laminate
- Lowest cost reinforced product
- Roll sizes 1.25m x 50m and 1.8m x 50m (509B shed lining material)
- Multi-use adaptable building product
- Made to BS 1521 Class B
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Installation Tips
As this product has so many different uses, the installation will vary depending on the final use and would be down to the installer to ensure they are happy with all fixings.