Klasse provides two engineered sheathing board solutions specifically suited to Steel Framing Systems (SFS), offering robust performance where it matters most. Whether you're dealing with lightweight infill or loadbearing SFS structures, our boards deliver the strength, stability and fire safety demanded by modern steel frame construction.

All of our external sheathing boards have undergone rigorous testing in the fields of fire protection, acoustics, racking strength and durability.

Our technical team understands the distinct requirements of SFS projects and is always ready to help you select the ideal board for your wall build-up.

Yes. Technical datasheets, installation guides, and test certifications for each board type are available on request or can be downloaded from the Klasse download centre.

The Klasse range of external sheathing boards have been extensively tested in a through wall system to achieve at least 90 mins fire resistance. (BS EN 1364-1 - EI 90 and BS EN 1365-1 - REI 90) and all boards are Euroclass A1 non-combustible. (BS EN 13501-1)

Klasse External Sheathing Boards are designed to be robust and tough in every step of the construction process. Klasse boards are resistant to weather and installation damage, and are suitable for use in extreme climates too.