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4x2 Timber

Our selection of 4x2 timber is perfect for structural projects such as framing, stud walls and joists. Strong, versatile, and easy to handle, this size remains a top choice for both professional builders and DIY enthusiasts.

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

    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...
  • Special Offer
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    Special Offer

    C24 Timber Decking Joists UC4 Treated Kiln Dried Regularised Redwood 47 x 100 x 3600mm (4x2)

    Crafted for durability and strength, our C24 Timber Joists UC4 Treated Redwood 47x100x3600mm are the ideal choice for your outdoor decking projects. These joists are UC4 treated, ensuring they are well-suited for ground and water contact, making them...
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    C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 47 x 100mm (4x2)

    £4.18 - £24.01 per piece (Ex VAT)
    £5.02 - £28.81 per piece (Inc VAT)
    C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC timber is your go-to choice for robust structural applications. C16 and C24 are strength grades; the higher the grade, the better the load bearing quality it has. C16 is normally the grade that...
    £4.18 - £24.01 per piece (Ex VAT)
    £5.02 - £28.81 per piece (Inc VAT)
  • Special Offer
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    Special Offer

    C16 Timber Decking Joists UC4 Treated Brown Incised Kiln Dried Regularised FSC 47 x 100mm (4x2)

    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,...
  • Special Offer
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    Special Offer

    C24 Timber Joists UC4 Treated Redwood 47 x 100 x 4800mm (4x2)

    Elevate your outdoor projects with C24 Treated Timber Decking Joists, meticulously crafted from premium Redwood and UC4 treated for exceptional ground contact durability. These joists are engineered from dense Scandinavian softwood, offering...
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    C24 Timber Joists Untreated Kiln Dried Regularised PEFC 47 x 100mm (4x2)

    £3.87 - £22.24 per piece (Ex VAT)
    £4.64 - £26.69 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...
    £3.87 - £22.24 per piece (Ex VAT)
    £4.64 - £26.69 per piece (Inc VAT)
  • C24%2044x95.jpg.jpeg C24%2044x95%20Treated%20TopAngle.jpg.jpeg

    C24 Timber Joists UC2 Treated Kiln Dried Regularised FSC 47 x 100mm (4x2)

    £4.18 - £24.01 per piece (Ex VAT)
    £5.02 - £28.81 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...
    £4.18 - £24.01 per piece (Ex VAT)
    £5.02 - £28.81 per piece (Inc VAT)
  • C24%2044x95%20Main.jpg.jpeg C24%2044x95%20Top1.jpg.jpeg

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

    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...
  • Special Offer
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    Special Offer

    C24 Timber Decking Joists UC4 Treated Green Kiln Dried Regularised Redwood PEFC 47 x 100mm (4x2)

    Our C24 timber joists are a perfect for supporting your decked area. This timber is UC4 treated, meaning that not only is it ideal for outdoor use, but it is also suitable for direct contact with the ground. C16 and C24 are strength grades; the higher...
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    C24 Timber Joists Untreated Kiln Dried Regularised FSC 47 x 100mm (4x2)

    £3.87 - £22.24 per piece (Ex VAT)
    £4.64 - £26.69 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...
    £3.87 - £22.24 per piece (Ex VAT)
    £4.64 - £26.69 per piece (Inc VAT)
  • Special Offer
    C24%2044x95%20Main.jpg.jpeg C24%2044x95%20Top1.jpg.jpeg
    Special Offer

    C16 Timber Decking Joists UC4 Treated Green Incised Kiln Dried Regularised FSC 47 x 100mm (4x2)

    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...

Our range of 4x2 timber (approx. 47mm x 100mm) is one of the most popular choices for construction and DIY. Perfect for stud walls, joists, and structural frameworks, it provides the strength and stability you need for professional results.

Need extra durability? 4x2 tanalised timber is ideal for outdoor or damp environments. Every piece of this timber is pressure-treated to protect against rot, decay and insect damage - ensuring strength that lasts.

What is 4x2 timber in mm?

Many customers ask this question. The answer is approximately 47mm x 100mm, which is the standard finished size after planing. This makes it ideal for structural work while being easy to handle and cut.

Why choose 4x2 timber?

4x2 timber is widely used in both domestic and commercial builds. Its strength makes it suitable for:

  • Stud wall framing
  • Roof joists and rafters
  • Decking frames
  • General construction work

Treated timber for outdoor use

If your project is exposed to moisture or outdoor conditions, treated timber is a good choice. Pressure-treated for added protection, this option helps prevent rot, fungal decay, and insect damage. It's ideal for decking, fencing and garden structures.

We stock a variety of lengths to suit any project. Browse our selection of 4x2 timber for strong, durable and cost-effective solutions for your building needs.