Class B W1 Breather Membrane
The Class B W1 Breather Membrane is a product of the ARBOSHIELD Pro® category and is used as an extremely vapour-permeable wall membrane with Class B-s1,d0 fire classification – suitable for all light steel frame and SFS type walling applications in high-rise and high-risk buildings.
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Specify Class B W1 Breather Membrane
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Unique properties of Class B W1 Breather Membrane
Helps limit the spread of fire across a façade with limited risk of smoke or burning droplets. Must be installed onto a Class A rated substrate to maintain its Class B fire performance.
Class B-s1,d0 fire classification
Class W1 resistance to water penetration
Extremely vapour permeable
Suitable for modular off-site construction
Can be installed onto any Class A rated substrate
Part of the ARBOSHIELD Pro® family of fire-resistant façade solutions
Technical Specifications & Downloads
| Description/Standard | Performance |
|---|---|
| Reaction to Fire (EN 13501) | B2-s1,d0* (*installed on Class A substrate) |
| Resistance to Water Penetration (EN 13859-1) | Class W1 |
| Tensile Strength MD (BS EN 12311-1) | 200 N/50mm BS EN 12311-1 |
| Tensile Strength CD (BS EN 12311-1) | 140 N/50mm BS EN 12311-1 |
| Flexibility at Low Temperature (EN 13859-1) | -40 °C |
| Water Vapour Transmission (ISO 12572) | 0.07 sd |
| Resistance to Nail Tearing MD (BS EN 12310-1) | 120 N BS EN 12310-1 |
| Resistance to Nail Tearing CD (BS EN 12310-1) | 140 N BS EN 12310-1 |
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Frequently Asked Questions
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Find your contacts
Regardless of whether you are an architect and planner, property developer, industry specialist, distributor, applicator or specifier – if you have any questions about our products, services or specific construction projects, please feel free to contact the CARLISLE® contact person in your area with your technical questions. Our experts will be happy to advise you.
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