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C16 Timber

Our range of C16 timber is ideal for structural applications where strength and durability are essential. Graded to meet UK building standards, timber C16 is commonly used for floor joists, roof battens, and stud walls.

We offer a wide selection of C16 timber sizes to suit your project needs, with both untreated and C16 treated timber options available for added resistance to moisture and decay.

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    C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 47 x 100mm (4x2)

    £4.01 - £23.05 per piece (Ex VAT)
    £4.81 - £27.66 per piece (Inc VAT)
    Discover the incredible strength and versatility of our C16 Timber Joists. These structural wood pieces are kiln dried and expertly pressure treated, making them resistant to wood-destroying fungi and ideal for both indoor and outdoor projects. With...
    £4.01 - £23.05 per piece (Ex VAT)
    £4.81 - £27.66 per piece (Inc VAT)
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    C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 47 x 75mm (3x2)

    £3.25 - £18.67 per piece (Ex VAT)
    £3.90 - £22.40 per piece (Inc VAT)
    C16 Timber Joists, expertly crafted for those who seek durability and reliability in construction projects. These UC3u treated, kiln-dried, and regularised joists are designed for external use, making them ideal for various outdoor applications including...
    £3.25 - £18.67 per piece (Ex VAT)
    £3.90 - £22.40 per piece (Inc VAT)
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    C16 Timber Joist UC3u Treated Kiln Dried FSC 47 x 150mm (6x2)

    £6.01 - £34.58 per piece (Ex VAT)
    £7.21 - £41.50 per piece (Inc VAT)
    Transform your outdoor spaces with our Timber Floor Joist, designed specifically for external use, making them perfect for decking joists. These robust timber joists are your go-to solution for projects requiring reliable structural support in...
    £6.01 - £34.58 per piece (Ex VAT)
    £7.21 - £41.50 per piece (Inc VAT)
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    C16 Timber Joists UC4 Treated Brown Incised Kiln Dried Regularised FSC 47 x 100mm (4x2)

    £4.20 - £24.16 per piece (Ex VAT)
    £5.04 - £28.99 per piece (Inc VAT)
    These UC4 Treated Brown Incised Kiln Dried Regularised joists are the backbone of a durable and sustainable deck, offering exceptional support for your decking planks. Crafted from premium load bearing C16 graded conifer timber, including spruce and fir,...
    £4.20 - £24.16 per piece (Ex VAT)
    £5.04 - £28.99 per piece (Inc VAT)
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    C16 Timber Joists UC4 Treated Brown Incised Kiln Dried Regularised FSC 47 x 150mm (6x2)

    £6.30 - £36.24 per piece (Ex VAT)
    £7.56 - £43.49 per piece (Inc VAT)
    C16 deck joists are perfect for supporting your decking area, as they sit under your decking planks. This brown timber carcassing is UC4 treated, meaning that not only is it ideal for outdoor use, but it is also suitable for direct contact with the...
    £6.30 - £36.24 per piece (Ex VAT)
    £7.56 - £43.49 per piece (Inc VAT)
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    C16 Timber Joists Untreated Kiln Dried Regularised FSC 47 x 100mm (4x2)

    £3.66 - £21.04 per piece (Ex VAT)
    £4.39 - £25.25 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...
    £3.66 - £21.04 per piece (Ex VAT)
    £4.39 - £25.25 per piece (Inc VAT)
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    C16 Timber Treated Kiln Dried Regularised PEFC 47 x 75mm (3x2)

    £3.03 - £17.43 per piece (Ex VAT)
    £3.64 - £20.92 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. It is machined to have rounded edges, smooth faces, and...
    £3.03 - £17.43 per piece (Ex VAT)
    £3.64 - £20.92 per piece (Inc VAT)
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    C16 Timber Untreated Kiln Dried Regularised FSC 47 x 75mm (3x2)

    £2.74 - £15.78 per piece (Ex VAT)
    £3.29 - £18.94 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...
    £2.74 - £15.78 per piece (Ex VAT)
    £3.29 - £18.94 per piece (Inc VAT)
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    C24 Timber Joists Untreated Kiln Dried Regularised FSC 47 x 100mm (4x2)

    £3.73 - £21.47 per piece (Ex VAT)
    £4.48 - £25.76 per piece (Inc VAT)
    Treated C24 is a structural timber that's commonly used for stud walls, roof and floor joists, and structural joinery. The use of C24 grade timber, which has a smaller cross section, allows for higher loads, and longer spans. C24 grade has fewer...
    £3.73 - £21.47 per piece (Ex VAT)
    £4.48 - £25.76 per piece (Inc VAT)
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    C16 Timber Untreated Kiln Dried Regularised FSC 47 x 75mm (3x2)

    £2.80 - £16.10 per piece (Ex VAT)
    £3.36 - £19.32 per piece (Inc VAT)
    C16 graded 3x2 timber carcassing is typically used for structural timber commonly used for stud walls, roof and floor joists, and structural joinery. However, as this is only 3x2, it's main usage is for vertical non-load bearing stud positions. C16 is...
    £2.80 - £16.10 per piece (Ex VAT)
    £3.36 - £19.32 per piece (Inc VAT)
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    C16 Timber Untreated Kiln Dried Regularised PEFC 47 x 75mm (3x2)

    £2.80 - £16.10 per piece (Ex VAT)
    £3.36 - £19.32 per piece (Inc VAT)
    3x2 C16 graded timber carcassing is commonly used for vertical non-load bearing stud positions. C16 is normally the grade that is produced from faster grown UK timber, however this is imported timber so it is slower grown foreign timber. It is machined...
    £2.80 - £16.10 per piece (Ex VAT)
    £3.36 - £19.32 per piece (Inc VAT)
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    C16 Timber Joists Untreated Kiln Dried Regularised FSC 47 x 200mm (8x2)

    £7.32 - £42.07 per piece (Ex VAT)
    £8.78 - £50.48 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...
    £7.32 - £42.07 per piece (Ex VAT)
    £8.78 - £50.48 per piece (Inc VAT)
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    C16 Timber Joists Untreated Kiln Dried Regularised FSC 47 x 175mm (7x2)

    £6.40 - £36.81 per piece (Ex VAT)
    £7.68 - £44.17 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...
    £6.40 - £36.81 per piece (Ex VAT)
    £7.68 - £44.17 per piece (Inc VAT)
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    C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 47 x 125mm (5x2)

    £5.01 - £28.81 per piece (Ex VAT)
    £6.01 - £34.57 per piece (Inc VAT)
    Treated timber is suitable to be used externally and is suitable for wet areas or areas where the timber will be coming into contact with the ground. Examples of treated timber uses are outdoor decking, shed bases, posts, sleepers. Regularised timber has...
    £5.01 - £28.81 per piece (Ex VAT)
    £6.01 - £34.57 per piece (Inc VAT)
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    C16 Timber Joists Untreated Kiln Dried Regularised FSC 47 x 150mm (6x2)

    £5.60 - £32.20 per piece (Ex VAT)
    £6.72 - £38.64 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 into the UK and...
    £5.60 - £32.20 per piece (Ex VAT)
    £6.72 - £38.64 per piece (Inc VAT)
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    C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 47 x 200mm (8x2)

    £8.02 - £46.10 per piece (Ex VAT)
    £9.62 - £55.32 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...
    £8.02 - £46.10 per piece (Ex VAT)
    £9.62 - £55.32 per piece (Inc VAT)
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    C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 47 x 225mm (9x2)

    £9.02 - £51.87 per piece (Ex VAT)
    £10.82 - £62.24 per piece (Inc VAT)
    Treated timber is suitable to be used externally and is suitable for wet areas or areas where the timber will not be coming into contact with the ground. Examples of treated timber uses are outdoor decking, shed bases, posts, sleepers. Regularised timber...
    £9.02 - £51.87 per piece (Ex VAT)
    £10.82 - £62.24 per piece (Inc VAT)
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    C16 Timber Joists Untreated Kiln Dried Regularised FSC 47 x 150mm (6x2)

    £5.49 - £31.55 per piece (Ex VAT)
    £6.59 - £37.86 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...
    £5.49 - £31.55 per piece (Ex VAT)
    £6.59 - £37.86 per piece (Inc VAT)
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    C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 47 x 175mm (7x2)

    £7.02 - £40.34 per piece (Ex VAT)
    £8.42 - £48.41 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...
    £7.02 - £40.34 per piece (Ex VAT)
    £8.42 - £48.41 per piece (Inc VAT)
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    C16 Timber Joists Untreated Kiln Dried Regularised FSC 47 x 125mm (5x2)

    £4.57 - £26.29 per piece (Ex VAT)
    £5.48 - £31.55 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...
    £4.57 - £26.29 per piece (Ex VAT)
    £5.48 - £31.55 per piece (Inc VAT)
  • C24%2044x120%20Main.jpg.jpeg C24%2044x120%20TopAngle.jpg.jpeg

    C16 Timber Joists Untreated Kiln Dried Regularised FSC 47 x 125mm (5x2)

    £4.67 - £26.83 per piece (Ex VAT)
    £5.60 - £32.20 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 into the UK and...
    £4.67 - £26.83 per piece (Ex VAT)
    £5.60 - £32.20 per piece (Inc VAT)
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    C16 Timber Joists UC3u Treated Kiln Dried Regularised FSC 75 x 100mm (4x3)

    £6.40 - £36.78 per piece (Ex VAT)
    £7.68 - £44.14 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...
    £6.40 - £36.78 per piece (Ex VAT)
    £7.68 - £44.14 per piece (Inc VAT)
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    C16 Timber Joists Untreated Kiln Dried Regularised FSC 47 x 200mm (8x2)

    £7.47 - £42.93 per piece (Ex VAT)
    £8.96 - £51.52 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 into the UK and...
    £7.47 - £42.93 per piece (Ex VAT)
    £8.96 - £51.52 per piece (Inc VAT)
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    C16 Timber Joists Untreated Kiln Dried Regularised FSC 47 x 225mm (9x2)

    £8.23 - £47.33 per piece (Ex VAT)
    £9.88 - £56.80 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...
    £8.23 - £47.33 per piece (Ex VAT)
    £9.88 - £56.80 per piece (Inc VAT)

Our range of C16 timber is a trusted choice for structural projects. This strength-graded timber is ideal for internal building work where durability matters. All our timber C16 is kiln-dried for stability and can be used for joists, rafters, and stud walls.

What is C16 timber?

C16 timber is structural timber graded for use in domestic and light commercial buildings. It offers strength and stability at an affordable price. If you’re building floors, roofs, or partitions, C16 treated timber is the ideal solution for lasting protection against moisture and decay.

C16 timber sizes

We stock a wide selection of C16 timber sizes to suit any project. Common dimensions include:

  • 47mm x 100mm
  • 47mm x 150mm
  • 47mm x 200mm

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

C16 vs C24 timber

Many customers ask about C16 vs C24 timber. The main difference is strength. C24 is stronger and often used for heavy loads or larger spans. However, C16 timber is more than enough for most internal structural work, offering great value without compromising safety.

Why choose C16 treated timber?

For outdoor or damp environments, choose C16 treated timber. It’s pressure-treated to resist rot, fungal decay, and insect attack. This makes it a smart choice for joists in ground-floor areas or outdoor frames where durability matters.

Explore our full range of C16 timber and find the perfect size for your project. Strong, reliable, and cost-effective – it’s the ideal choice for structural building work.