Breather Membrane

Class A - EN 13501-1

OBEX CORTEX 0220FR Class A1 Breather Membrane features water resistant yet breathable technology, which facilitates the escape of moisture and the prevention of condensation within the external wall construction.  It can be applied to many surfaces including sheathing board, concrete and insulation. 

This Breather Membrane achieves A1 fire-classification when tested to EN 13859-2, the highest fire classification available.

The membrane is installed using the OBEX CORTEX 0825 Installation Kit which includes 2 rolls of 0824FR Double-Sided Tape and 6 rolls of single sided 0823FR UV Façade Tape.

Typical Uses

  • In façade construction behind cladding systems, ensuring water does not penetrate into the structure.
  • Behind external masonry or curtain walling, to safeguard the primary waterproofing from wind-driven rain and to allow moisture from inside to escape.

Request Technical Data

  • 3rd Party Certified 3rd Party Certified
  • 12 Months Exposure 12 Months Exposure
  • Class A Class A
  • Breathable Breathable
  • W2 - EN 13859-2 W2 - EN 13859-2
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Product Specs









Technical Specs

Harmonised Standard

EN 13859-2

Fire Classification | EN 13501-1


Watertightness | EN 1928


Sd value | EN ISO 12572


Tensile Strength | EN 12311-2

Longitudinal – 3828 N/50mm, Transversal - 1992 N/50mm

3rd Party Approved

KIWA Approval – BAW-22-244-P-A-UK

UV Resistance

12 Months UV Resistance


OBEX CORTEX 0220FR Breather Membrane KIWA Cert

OBEX CORTEX 0220FR Breather Membrane Installation Guide

OBEX CORTEX 0220FR Breather Membrane W2 Class A1 TDS

OBEX CORTEX 0220FR Breather Membrane W2 Class A1 SDS

OBEX CORTEX 0220FR Breather Membrane W2 Class A1 DoP

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Product Order Codes

Product CodesProduct DescriptionWidthLengthBox Quantity
20.0220.012OBEX CORTEX 0220FR Breather Membrane (White) - Class A1 / W21500mm50m1

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