Why You Don’t Need a Breather Membrane with Klasse G-board

Latest News Thu, Apr 16, 2026 3:33 PM

Traditionally, breather membranes have been considered indispensable components of external wall systems, providing essential protection against water ingress while allowing vapour to escape. However, Klasse G-board a gypsum external sheathing board offers a transformative solution that eliminates the need for a separate breather membrane.

An Integrated Solution: Built to Breathe, Designed to Perform

Klasse G-board provides an integrated approach by combining breathability and water resistance within a single product. This innovation is made possible through its advanced construction:

  • GRP Face Covering: Both sides of the board feature a Glass Reinforced Polyester (GRP) face, delivering exceptional durability and water resistance.
  • Enhanced Gypsum Core: The specially engineered core facilitates a breathable system, enabling moisture vapour to escape while preventing water penetration.

This all-in-one design streamlines installation processes and ensures optimal facade performance without the need for additional materials like traditional breather membranes.

The Benefits of Klasse G-board

Klasse G-board offers a host of advantages that set it apart as a preferred choice for architects, contractors, and developers:

  1. Streamlined Construction: By eliminating the need for a separate breather membrane, Klasse G-board reduces material requirements and installation time, delivering significant cost savings.
  2. Exceptional Weather Resistance: The GRP face ensures superior protection against water ingress, even in the most challenging environmental conditions. It also comes with a 12 month exposure guarantee as standard for every board.
  3. Enhanced Breathability: The advanced gypsum core prevents condensation by allowing moisture vapour to escape, contributing to a healthier building envelope.
  4. A1 Fire Rating: As a non-combustible board with an A1 fire rating, Klasse G-board meets the highest fire safety standards, ensuring maximum safety for occupants and compliance with regulatory requirements.
  5. Sustainability: By minimising the use of materials and simplifying the construction process, Klasse G-board supports sustainable building practices and reduces environmental impact.

Proven Performance and Industry Recognition

Klasse G-board has been rigorously tested to exceed industry benchmarks for durability, performance, and safety. Leading facade consultants have praised it as “an absolute gamechanger,” highlighting its innovative design and practical benefits. Whether applied in high-rise developments or residential projects, Klasse G-board delivers reliable and efficient solutions tailored to modern construction demands.

To learn more about Klasse G-board and how it can elevate your next project, visit our website (www.klassegroup.co.uk) or reach out to our team (01432 842 030) to discuss your specific needs

Klasse G-board: Built to Breathe, Designed to Perform.

In association with Klasse Group Ltd


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Company Details

Pioneer House, Beacon Road
Rotherwas Industrial Estate
Hereford
Herefordshire
HR2 6JF
United Kingdom
T: 01432 842 030
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