Timber frame construction is becoming an increasingly popular choice in the UK, especially for modular buildings and low-rise projects. The speed of build, sustainability benefits, and cost efficiencies make timber frames ideal for schools, healthcare facilities, residential housing, and commercial units. However, as with any construction method, the performance of the building envelope depends heavily on the materials used. External sheathing boards play a vital role here – providing strength, stability, and weather protection.
The Benefits of Sheathing Boards in Timber Frames
When used in timber frame builds, external sheathing boards deliver several important benefits. They improve racking resistance, adding structural rigidity to lightweight timber frames. They also create a robust substrate for external finishes such as rainscreen cladding, brick slips, or render systems. Crucially, sheathing boards protect the frame during the construction phase, resisting exposure to wind, rain, and other on-site conditions before the façade is applied.
From a performance perspective, sheathing boards enhance fire safety, weather resistance, and acoustic performance – all key considerations for modern modular and low-storey buildings. They help ensure the completed structure meets regulatory requirements while supporting long-term durability.
Why Klasse G-board and C-board Work with Timber Frames
Klasse offers two distinct sheathing board solutions that both perform exceptionally well with timber frames.
- Klasse G-board is a gypsum sheathing board designed for speed and ease of installation. Lightweight yet durable, it is simple to handle and cut on site, making it well suited to the fast build programmes often seen in modular projects. G-board provides weather protection and dimensional stability, ensuring the timber frame remains protected during the build process.
- Klasse C-board is a calcium silicate cement board that brings added toughness. With its high impact resistance and moisture durability, C-board is ideal for external applications where a stronger substrate is required. It is particularly valuable for projects that demand enhanced durability due to exposure to harsher weather conditions.
Both options integrate seamlessly into through-wall systems, and when combined with Klasse’s range of airtight tapes, sealants, and insulation products, they help deliver complete external envelope solutions tailored to modern timber construction.
For modular and low-rise buildings using timber frames, external sheathing boards are essential for structural stability, protection, and compliance. Klasse G-board and C-board provide proven, tested solutions that give peace of mind to designers, contractors, and clients alike – ensuring timber frame buildings perform to the highest standards.
For more information, view our timber frame solutions page here or contact the Klasse team with any question you may have.
