47mm x 100mm Sawn Treated Timber C16/C24 (4" x 2") 3m

What Is 4x2 Timber 3m?

4x2 Timber 3m is a high-quality, pressure-treated timber product designed for a wide range of construction and structural applications.

Available in C16 and C24 grades, this timber offers varying levels of strength to suit different load-bearing requirements. C24 is a higher-grade timber, suitable for demanding applications such as roof trusses and heavy structural framing, while C16 is ideal for lighter framing and non-load bearing elements.

Both grades of timber are treated with Tanalith 'E', a high-performance wood preservative that provides exceptional resistance to rot, decay, and insect attack. This treatment makes the timber highly durable and well-suited for use in both internal and external environments, especially in areas prone to moisture or fluctuating weather conditions.

We supply high quality 50x100 timber in various lengths: 2.4m, 3m, 3.6m, 4.2m, 4.8m and 6m with a consistent thickness of 47mm.

Please Note: The finished size of our carcassing timber may vary slightly from the nominal dimensions. You can expect to receive timber that is finished with a thickness 2mm less and a width 5mm less than the nominal measurements stated. Colour and finish are representative only and may vary slightly as this is a natural product.

Where is 4x2 Timber 3m C16/C24 Used? 

Treated timber is often used to build partition stud work, in conjunction with plasterboard and insulation - such as Rockwool RWA45 100mm - to provide acoustic performance.

Despite their difference in grade, both C16 and C24 timber will perform well in general construction projects. However, for larger-scale projects (or in applications where strength is vital, such as balconies, terraces and bridges) we recommend using the stronger, more reliable C24 timber grade.

4x2 Timber 3m is generally used in the following applications: 

• Flooring
• Roofing - rafters/joists in a loft floor
• Walling
• Decking joists 
• Carcassing timber in floor joists
• Garden furniture and other outdoor projects 

What Does C16/C24 Carcassing Timber Mean?

C24 grade is superior to C16, offering greater strength with more knots and fewer defects. This suits it to tasks which require durability and sturdiness, namely structural applications, such as floor joists or roof battens.

C24 timber is a premium choice that can support higher loads and wider spans. Only good quality timber imported from areas where the weather conditions demand a slower growth rate (and hence a tighter grain) achieves a C24 grade.

Provided it is pressure-treated, C16 timber can be used externally in an outer structure of a building, as well as in decking. C16 graded timber is sturdy enough for most tasks and will satisfy performance requirements at a lower cost than C24 timber.

Sawn Treated Timber C16/C24 (4" x 2") 3m Benefits

• Tanalised timber pressure treated with Tanalith 'E' to prevent rot 
• Kiln dried to improve stability and straightness
• Strength graded to C16/C24 for known structural performance
• More length options may be available on request