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7x3 Timber

Our heavy-duty 7x3 timber is designed for demanding structural applications, including load-bearing walls, roof joists and large-scale framing, for reliable performance in indoor and outdoor builds where strength is key.

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  • C24%2070x170%20Main.jpg.jpeg C24%2070x170%20Top%20Angle.jpg.jpeg

    C24 Timber Joists Kiln Dried Regularised PEFC 70 x 170mm (7x3)

    £12.86 - £73.96 per piece (Ex VAT)
    £15.43 - £88.75 per piece (Inc VAT)
    C24 is a structural timber typically used to support structures and frameworks for buildings such as walls, ceilings and decking joists. It has many other uses for structural joinery. The use of C24 grade timber, which has a smaller cross-section,...
    £12.86 - £73.96 per piece (Ex VAT)
    £15.43 - £88.75 per piece (Inc VAT)
  • C24%2044x170%20Main.jpg.jpeg C24%2044x170%20Top%20Angle.jpg.jpeg

    C24 Timber Joists UC2 Treated Kiln Dried Regularised PEFC 70 x 170mm (7x3)

    £13.73 - £78.92 per piece (Ex VAT)
    £16.48 - £94.70 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...
    £13.73 - £78.92 per piece (Ex VAT)
    £16.48 - £94.70 per piece (Inc VAT)
  • C24%2044x170%20Main.jpg.jpeg C24%2044x170%20Top%20Angle.jpg.jpeg

    C24 Timber Joists UC2 Treated Kiln Dried Regularised FSC 70 x 170mm (7x3)

    £13.73 - £78.92 per piece (Ex VAT)
    £16.48 - £94.70 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...
    £13.73 - £78.92 per piece (Ex VAT)
    £16.48 - £94.70 per piece (Inc VAT)

Our 7x3 timber is pressure treated and suitable for indoor and outdoor use for joists, rafters and load-bearing frames. With excellent strength and stability, this timber size is ideal for both professional construction and robust DIY projects.

Why choose 7x3 timber?

Heavy-duty 7x3 timber is designed for situations where extra width and strength are required. Common uses include:

  • Roof joists and rafters
  • Load-bearing walls
  • Large-scale frames
  • Structural applications

    • What is 7x3 timber in mm?

    7x3 timber is approximately 75mm x 175mm.

    Sizes and options

    We stock 7x3 timber in a variety of lengths to suit your project needs. It's also available in both C24 and C16 grades.

    Shop our full range for reliable, long-lasting construction materials. Strong, stable and versatile – perfect for any structural project.

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