What Is C24 Timber and Where Is It Used?
C24 is a strength grade used for structural softwood timber. It is commonly specified for building work where the timber needs to meet particular strength and quality requirements.
TSAR supplies C24 graded carcassing timber in a range of sizes and lengths for projects across London and Greater London.
Advice by Andrew Tsaroulla, Director of TSAR Building Supplies
Last updated: 10th October 2026
What Does C24 Mean?
The C24 grade shows that the timber has been strength graded for structural use.
Compared with lower structural grades, C24 timber is selected to meet higher strength requirements.
The grade does not tell you what size timber is needed. The correct section size and length depend on what the timber is being used for and the project specification.
What Is C24 Timber Used For?
C24 timber is commonly used for:
Roof structures
Floor joists
Stud walls
Structural framing
Timber extensions
General structural carpentry
For structural work, always follow the timber dimensions and grade shown on the relevant drawings or specification.
What C24 Timber Does TSAR Supply?
TSAR supplies C24 carcassing timber in a range of widths, depths and lengths.
The product page lists the sizes currently available through TSAR..
Is All Timber C24?
No. Different timber products are intended for different jobs.
Structural projects may require strength-graded carcassing timber, while joinery and finishing work may use products such as planed timber or floorboards.
Related Building Advice
What Structural Timber Do I Need? →
What Is Carcassing Timber Used For? →
Need C24 Timber?
Send TSAR the timber size, required length, quantity and delivery postcode.
General guidance only: Structural timber sizes and grades should follow the relevant project drawings, calculations or professional specification.