Fixing and buying guide
4.2Mtr X 47 X 75mm C24 Treated Regularised KD Carcassing Timber
Selecting the right size
This product is supplied at 47 × 75mm cross-section in 4.2 metre lengths. C24 timber is suitable for floor joists, roof battens, stud walls, and decking frames. Check your structural design or building plans to confirm the required dimensions and spacing for your application. C24 offers enhanced strength and stability compared to C16 grade, making it suitable for applications requiring higher load-bearing capacity.
- Cross-section: 47 × 75mm
- Length: 4.2 metres
- Grade: C24 strength-graded
- Finish: Regularised and kiln-dried (KD)
Treatment and durability
This timber is pressure-treated with preservative to protect against rot, fungal decay, and insect infestation. The treatment provides long-term durability for both indoor and outdoor use. Treated timber is suitable for applications where moisture exposure is likely, such as ground-floor joists or external construction work.
- Pressure-treated for rot and decay resistance
- Protected against insect attack
- Suitable for indoor and outdoor applications
- Meets BS EN standards
Storage and handling
Store treated timber in a dry location, protected from direct weather exposure. Stack pieces horizontally with spacers between layers to allow air circulation and prevent moisture accumulation. Avoid prolonged contact with the ground. Handle with care to prevent damage to the planed finish.
- Store in a dry, sheltered location
- Use spacers when stacking to allow airflow
- Keep off the ground
- Protect from prolonged wet conditions
Installation notes
The regularised, planed finish makes this timber straightforward to handle and install. Ensure proper fixing methods are used according to your structural design—typically galvanised or stainless steel fixings for treated timber in damp environments. Allow for natural movement due to moisture changes, particularly in external applications.
- Use appropriate fixings for treated timber
- Follow structural design specifications for spacing and support
- Allow for timber movement in external applications
- Smooth finish aids handling and installation