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C24 Timber

Browse our range of C24 timber, ideal for demanding structural applications where superior strength and stability are required. Stronger than standard timber C24, it’s the preferred choice for load-bearing projects like roofing and flooring.

We stock a wide variety of C24 timber sizes and offer C24 treated timber options for extra protection against moisture and decay. Not sure what you need? Learn the difference between C16 vs C24 timber to choose the right grade for your project.

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    C24 Timber Joists UC2 Treated Kiln Dried Regularised FSC 75 x 100mm (4x3)

    £14.40 - £41.40 per piece (Ex VAT)
    £17.28 - £49.68 per piece (Inc VAT)
    C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that is produced from faster grown UK timber. C24 is a premium product as the wood is slower grown and is also denser. Higher...
    £14.40 - £41.40 per piece (Ex VAT)
    £17.28 - £49.68 per piece (Inc VAT)
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    C24 Timber Joists UC2 Treated Kiln Dried Regularised FSC 75 x 175mm (7x3)

    £25.20 - £72.45 per piece (Ex VAT)
    £30.24 - £86.94 per piece (Inc VAT)
    C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that is produced from faster grown UK timber. C24 is a premium product as the wood is slower grown and is also denser. Higher...
    £25.20 - £72.45 per piece (Ex VAT)
    £30.24 - £86.94 per piece (Inc VAT)
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    C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 175mm (7x2)

    UC2 treated C24 timber joist, kiln dried and regularised for reliable structural performance. Buy online or Click & Collect from your local branch.
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    C24 Timber Joists Untreated Kiln Dried Regularised FSC 75 x 150mm (6x3)

    £20.12 - £57.85 per piece (Ex VAT)
    £24.14 - £69.42 per piece (Inc VAT)
    C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that is produced from faster grown UK timber. However, this C16 timber is imported into the UK and therefore comes from is slow...
    £20.12 - £57.85 per piece (Ex VAT)
    £24.14 - £69.42 per piece (Inc VAT)
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    C24 Timber Joists Untreated Kiln Dried Regularised PEFC 100 x 300mm (12x4)

    C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that is produced from faster grown UK timber. C24 is a premium product as the wood is slower grown and is also denser. Higher...
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    C24 Timber Joists Untreated Regularised PEFC 100 x 200mm (8x4)

    C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that is produced from faster grown UK timber. C24 is a premium product as the wood is slower grown and is also denser. Higher...
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    C24 Timber Joists UC2 Treated Kiln Dried Regularised FSC 47 x 225mm (9x2)

    £19.28 - £55.42 per piece (Ex VAT)
    £23.14 - £66.50 per piece (Inc VAT)
    C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that is produced from faster grown UK timber. C24 is a premium product as the wood is slower grown and is also denser. Higher...
    £19.28 - £55.42 per piece (Ex VAT)
    £23.14 - £66.50 per piece (Inc VAT)
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    C24 Timber Joists Untreated Kiln Dried Regularised FSC 47 x 175mm (7x2)

    £13.91 - £40.00 per piece (Ex VAT)
    £16.69 - £48.00 per piece (Inc VAT)
    C16 graded carcassing is a structural timber commonly used for stud walls, roof and floor joists, and structural joinery. C16 is normally the grade that is produced from faster grown UK timber, however this timber is imported so it is slow grown. C16...
    £13.91 - £40.00 per piece (Ex VAT)
    £16.69 - £48.00 per piece (Inc VAT)
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    C24 Timber Joists Untreated Kiln Dried Regularised FSC 47 x 225mm (9x2)

    £17.89 - £51.43 per piece (Ex VAT)
    £21.47 - £61.72 per piece (Inc VAT)
    C16 graded carcassing is a structural timber commonly used for stud walls, roof and floor joists, and structural joinery. C16 is normally the grade that is produced from faster grown UK timber. However, this is imported C16 timber and therefore is slow...
    £17.89 - £51.43 per piece (Ex VAT)
    £21.47 - £61.72 per piece (Inc VAT)
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    C24 Timber Joists Untreated Kiln Dried Regularised FSC 75 x 225mm (9x3)

    £30.18 - £86.78 per piece (Ex VAT)
    £36.22 - £104.14 per piece (Inc VAT)
    C16 graded carcassing is a structural timber commonly used for stud walls, roof and floor joists, and structural joinery. C16 is normally the grade that is produced from faster grown UK timber. However, this C16 timber is imported and therefore is slow...
    £30.18 - £86.78 per piece (Ex VAT)
    £36.22 - £104.14 per piece (Inc VAT)
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    C24 Timber Joists Untreated Kiln Dried Regularised PEFC 47 x 200mm (8x2)

    £16.34 - £46.99 per piece (Ex VAT)
    £19.61 - £56.39 per piece (Inc VAT)
    PEFC certified C24 untreated kiln dried timber joist, regularised for strength and structural applications. Buy online or Click & Collect from Howarth Timber.
    £16.34 - £46.99 per piece (Ex VAT)
    £19.61 - £56.39 per piece (Inc VAT)
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    C24 Timber Joists Untreated Kiln Dried Regularised FSC 75 x 200mm (8x3)

    £26.83 - £77.13 per piece (Ex VAT)
    £32.20 - £92.56 per piece (Inc VAT)
    It is machined to have rounded edges, smooth faces, and sides, for a more uniform piece of timber. It is kiln dried to minimise moisture content and improve strength and stability. The finished size you will receive is 70mm x 195mm. C16 and C24 are...
    £26.83 - £77.13 per piece (Ex VAT)
    £32.20 - £92.56 per piece (Inc VAT)
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    C24 Timber Joists Untreated Kiln Dried Regularised FSC 75 x 175mm (7x3)

    £23.48 - £67.49 per piece (Ex VAT)
    £28.18 - £80.99 per piece (Inc VAT)
    It is machined to have rounded edges, smooth faces, and sides, for a more uniform piece of timber. It is kiln dried to minimise moisture content and improve strength and stability. The finished size you will receive is 70mm x 170mm. C16 and C24 are...
    £23.48 - £67.49 per piece (Ex VAT)
    £28.18 - £80.99 per piece (Inc VAT)
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    C24 Timber Joists Untreated Kiln Dried Regularised PEFC 75 x 175mm (7x3)

    Kiln dried C24 untreated timber joist, regularised and PEFC certified for structural building applications. Buy online or Click & Collect today.
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    C24 Timber Joists Untreated Kiln Dried Regularised PEFC Premium Length 75 x 175mm (7x3)

    Premium length C24 untreated timber joist, kiln dried and regularised for structural timber projects. Buy online with delivery or Click & Collect.
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    C24 Timber Joists Untreated Regularised PEFC 47 x 250mm (Finished Size 45x247mm)

    £21.56 - £62.00 per m3 (Ex VAT)
    £25.87 - £74.40 per m3 (Inc VAT)
    PEFC certified untreated C24 timber joist, regularised for consistent dimensions and structural use. Buy online with delivery or Click & Collect today.
    £21.56 - £62.00 per m3 (Ex VAT)
    £25.87 - £74.40 per m3 (Inc VAT)
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    C24 Wet Graded Carcassing Timber PEFC 47 x 300mm

    £20.22 - £58.14 per m3 (Ex VAT)
    £24.26 - £69.77 per m3 (Inc VAT)
    This C24 wet-graded carcassing timber is a high-strength, structural-grade softwood designed for reliable performance in construction projects. Precision sawn and graded to C24 standards, it provides excellent durability, stability, and load-bearing...
    £20.22 - £58.14 per m3 (Ex VAT)
    £24.26 - £69.77 per m3 (Inc VAT)

Our range of C24 timber is designed for projects that need extra strength. This high-grade timber is perfect for load-bearing applications, large spans, and structural work. Every piece of timber C24 is kiln-dried for stability and precision-cut for accuracy.

What is C24 timber?

Many people ask, “what is C24 timber?” C24 is a structural strength grade that offers greater load capacity and reliability than C16. It’s the ideal choice for roofs, floors, and heavy-duty framing. If your project requires superior performance, choose C24 timber.

C24 timber sizes

We stock a wide range of C24 timber sizes to suit any build. Popular dimensions include:

  • 4x2 (approx. 47mm x 100mm)
  • 6x2 (approx. 47mm x 150mm)
  • 8x2 (approx. 47mm x 200mm)

Whether you need short lengths or full beams, our range has you covered.

C16 vs C24 timber

A common question is C16 vs C24 timber. Both are structural grades, but C24 is stronger and can handle higher loads and longer spans. This makes it the preferred choice for demanding projects like decking, roofs, or heavy flooring.

C24 treated timber for outdoor use

For added protection, choose C24 treated timber. It’s pressure-treated to resist rot, decay, and insect attack, making it perfect for outdoor structures or areas exposed to moisture.

Order your C24 timber today

Shop our range of C24 timber in sizes such as 4x2, 6x2, and 8x2 for strength-critical projects. Reliable, durable, and built to last – C24 is the ultimate choice for structural work.