How and where to use guide
3.6Mtr X 47 X 50mm (2" x 2") Treated Regularised KD Carcassing Timber
Typical applications
This timber size is commonly used in stud wall construction, roof battens, floor joists in lighter-load applications, and decking frames. It is also suitable for general structural framing, bracing, and support work. The C24 grade ensures adequate strength for these applications whilst the treatment provides long-term protection against decay.
- Stud walls and partition framing
- Roof battens and rafter support
- Decking frames and outdoor structures
- General structural framing and bracing
Indoor applications
For internal building work such as stud walls, floor joists, and roof structures, treated carcassing timber provides reliable structural performance and durability. The planed, regularised finish gives a clean appearance and makes installation straightforward. The preservative treatment offers protection against any moisture exposure during construction or in service.
- Stud walls and internal partitions
- Floor joists and ceiling joists
- Roof structures and battens
- Internal bracing and support members
External applications
The preservative treatment makes this timber suitable for external use, including decking frames, garden structures, and outdoor building work. The treatment protects against rot and insect attack, extending the service life of external structures. Ensure adequate ventilation and drainage around external timber to maximise durability.
- Decking frames and outdoor platforms
- Garden structures and sheds
- External bracing and support work
- Ensure good ventilation and drainage around external timber
Installation and fixing
Treated carcassing timber can be fixed using standard carpentry methods including nailing, screwing, and bolting. Use corrosion-resistant fixings (stainless steel or galvanised) when installing external timber to prevent rust staining and deterioration. Ensure all connections are secure and follow structural engineer's details for load-bearing applications.
- Use corrosion-resistant fixings for external work
- Follow structural engineer's details for load-bearing applications
- Ensure adequate fixing density for structural integrity
- Allow for timber movement in design and installation
Finishing and maintenance
Treated timber can be left to weather naturally, or finished with paint, stain, or wood preservative depending on aesthetic and durability requirements. For external applications, periodic inspection and maintenance will extend service life. Any damage to the surface treatment should be repaired promptly to maintain protection.
- Can be painted, stained, or left to weather
- Inspect external timber periodically for damage
- Repair any damage to surface treatment promptly
- Reapply finish as needed to maintain protection