Klasse Group unveils innovative W1 and A1 tested façade system

Sustainability Mon, Jun 1, 2026 10:04 AM

Klasse Group is proud to introduce its latest innovation in facade performance and compliance - the UK’s first W1and A1 tested glass fibre faced gypsum sheathing board system.

Designed to meet the increasing demands of modern external wall construction, the Klasse G-board has been independently tested to achieve W1, the highest standard for watertightness performance.

As facade compliance, durability and weather resistance come under greater scrutiny, architects, specifiers and contractors are demanding systems that are not only compliant, but proven. The Klasse W1 tested solution delivers exactly that, combining robust technical performance with practical installation benefits.

Alongside its W1 tested performance, Klasse’s gypsum sheathing board also offers a 12-month exposure guarantee, providing confidence during extended construction programmes and protecting projects from the challenges of unpredictable site conditions.

The benefits:

By integrating high-performance sheathing and watertightness capability into a fully tested system, Klasse helps streamline the facade build-up process. The result is a smarter specification solution that supports:

  1. Faster project delivery
  2. Reduced installation time
  3. Lower labour costs
  4. Improved buildability
  5. Greater specification confidence

Water ingress remains one of the biggest risks to long-term building performance, leading to structural deterioration, thermal inefficiency and costly remediation. Klasse G-board gives specifiers reassurance that the external wall assembly can withstand severe exposure conditions.

At Klasse Group, compliance is never treated as an afterthought. Working alongside UKAS-accredited testing bodies and independent certification organisations, we continue to invest in fully tested facade systems that meet the evolving demands of the construction industry.


Technical sheets, specifications and product information are available at www.klassegroup.co.uk, making it easier than ever for architects and specifiers to access the latest Klasse system information.

If you would like a project quotation to see how much money you could save on your next project, speak to our sales team today:

sales@klassegroup.co.uk
01432 842 030

Klasse Group also offers full project support, including technical guidance and on-site demonstrations to show the best practice installation methods for the Klasse G-board system.

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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