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Rough Sawn Timber

Rough Sawn Timber is also referred to as carcassing timber.  It is used to create floor joists and timber framing in structural applications. Usually rough sawn timber comes in 3 different types of grading: C16 timber, C24 Timber and part graded timber.

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    Rough Sawn Timber UC3u Treated Green Unseasoned FSC 22 x 150mm (6x1)

    £2.85 - £16.39 per piece (Ex VAT)
    £3.42 - £19.67 per piece (Inc VAT)
    Manufactured from FSC certified sawn timber, so you have complete peace of mind that the timber is procured from sustainable sources. These fencing boards are UC3u treated timber, meaning they perfect for outdoor use providing it is above ground...
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    Rough Sawn Timber UC3u Treated Green Unseasoned FSC 22 x 100mm (4x1)

    £1.90 - £10.93 per piece (Ex VAT)
    £2.28 - £13.12 per piece (Inc VAT)
    Treated timber is suitable to be used externally and is suitable for wet areas, however UC3u treated timber shouldn't be used for in-ground or water contact. Examples of UC3u treated timber uses are outdoor decking, shed bases, posts, sleepers...
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    Rough Sawn Timber UC3u Treated Kiln Dried Regularised FSC 44 x 44mm (2x2)

    £2.16 - £12.45 per piece (Ex VAT)
    £2.59 - £14.94 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. Carcassing is a...
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    Rough Sawn Timber UC3u Green Treated Unseasoned FSC 22 x 75mm (3x1)

    £1.43 - £8.20 per piece (Ex VAT)
    £1.72 - £9.84 per piece (Inc VAT)
    Carcassing is a standard term term that means the timber is used to form floors, walls, ceilings and roofs of properties. Unseasoned timber means timber than has not yet dried to a moisture content matched to its intended environment, which means it can...
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    Rough Sawn Timber Unseasoned FSC 22 x 100mm (4x1)

    £1.55 - £8.94 per piece (Ex VAT)
    £1.86 - £10.73 per piece (Inc VAT)
    Carcassing is a generic trade term term meaning the timber is used to form floors, walls, ceilings and roofs of properties. All our timber has full chain of custody, meaning our timber is sourced responsibly. This timber is kiln dried to minimise...
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    Rough Sawn Timber Unseasoned FSC 22 x 150mm (6x1)

    £2.33 - £13.41 per piece (Ex VAT)
    £2.80 - £16.09 per piece (Inc VAT)
    Carcassing is a standard term term that means the timber is used to form floors, walls, ceilings and roofs of properties. Unseasoned timber means timber than has not yet dried to a moisture content matched to its intended environment, which means it can...
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    Rough Sawn Timber Regularised FSC 47 x 50mm (2x2)

    £1.97 - £11.31 per piece (Ex VAT)
    £2.36 - £13.57 per piece (Inc VAT)
    Regularised timber has gone through a machine which rounds the edges and smooths the faces and sides of the piece. This operation uniforms the finished size which will usually be 5mm less than stated on both the face and width. Carcassing is a generic...
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    Rough Sawn Timber UC3u Treated Unseasoned UK FSC 25 x 50mm (2x1)

    £1.33 - £7.67 per piece (Ex VAT)
    £1.60 - £9.20 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. Carcassing is a...
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    Rough Sawn Timber Unseasoned 38 x 50mm

    £1.69 - £9.73 per piece (Ex VAT)
    £2.03 - £11.68 per piece (Inc VAT)
    Carcassing is the general term for timber that is used to form floors, walls, ceilings and roofs of properties. All our timber has full chain of custody, meaning our timber is sourced responsibly. Unseasoned timber means timber than has not yet dried to...
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    Rough Sawn Timber UC3u Treated Green Unseasoned FSC 22 x 200mm (8x1)

    £3.93 - £22.62 per piece (Ex VAT)
    £4.72 - £27.14 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.
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    Rough Sawn Timber Unseasoned FSC 22 x 75mm (3x1)

    £1.17 - £6.70 per piece (Ex VAT)
    £1.40 - £8.04 per piece (Inc VAT)
    Carcassing is a generic trade term term meaning the timber is used to form floors, walls, ceilings and roofs of properties. This timber is kiln dried to minimise moisture content and improve strength and stability, as well as pressure treated with...
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    Rough Sawn Timber UC3 Treated Green Unseasoned FSC 22 x 225mm

    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. Carcassing is a...
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    Rough Sawn Timber Unseasoned 75 x 75mm (3x3)

    £3.65 - £20.96 per piece (Ex VAT)
    £4.38 - £25.15 per piece (Inc VAT)
    Carcassing is a generic trade term which refers to the timber used to form floors, walls, ceilings and roofs of properties. Unseasoned timber means timber than has not yet dried to a moisture content matched to its intended environment, which means it...
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    Rough Sawn Timber UC3u Treated Unseasoned UK FSC 25 x 38mm

    £1.01 - £5.83 per piece (Ex VAT)
    £1.21 - £7.00 per piece (Inc VAT)
    Sawn softwood timber pressure treated to enhance resistance to rot, insect and fungal attack. Ideal framing timber for a multitude of end uses.
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    Rough Sawn Timber 100 x 100mm (4x4)

    £15.87 - £91.23 per piece (Ex VAT)
    £19.04 - £109.48 per piece (Inc VAT)
    Carcassing is a timber that's commonly used for stud walls, roof and floor joists. This product is not graded C16 or C24 therefore it is not intended for structural joinery. All our timber has full chain of custody, meaning our timber is sourced...

Rough Sawn Timber

What is Structural Carcassing Timber?

Often referred to as carcassing timber, this type of wood is most commonly used in structural applications that involve the timber being used in an area that won’t be seen, and typically comes in three gradings:

  • C16 Timber
  • C24 Timber
  • Part Graded Timber

Do I need Treated Structural Timber?

If the timber is going to be placed in an area where attacks from external problems such as moisture or fungal attacks, are likely to cause major problems, then we strongly recommend purchasing treated structural timber.

For all the following applications, we generally recommend using a treated structural timber:

  • Roof Rafters
  • Timber Framing
  • Ceiling Joists
  • Floor Joists
  • Deck Joists

I need a Sawn Finish Structural Timber

Sawn Carcassing Timber has largely been replaced in UK stockists with “eased edge” stock being introduced in the UK in 2004.

Eased Edged means that the timber is semi-surfaced and finished to a uniform finish that is relatively smooth. Four corners are radiused to reduce the likelihood of splinters.

Most of our branches do hold stock of sawn boards that are either treated or untreated. However, if you require a sawn unsurfaced finish, please contact your nearest branch, who will be able to source this as a special item to meet your requirements. Most sizes can be obtained within 5 to 10 working days.

Confused about C16 and C24 structural timber and which grade you will need? Your nearest branch will be more than happy to help.

Frequently Asked Questions

What is the difference between each type ie C16, C24 and part graded timber?
All graded timbers are slow-grown and kiln-dried so that there is no more than 20% of moisture in the wood. This is in keeping with relevant building regulations, as the kiln-drying process creates a timber that is incredibly strong, guaranteeing stability.
What is C16 Timber?
C16 graded structural timber is the most cost-effective option and meets performance requirements. Kiln dried C16 is generally recommended for most applications if the correct spans are used and is mainly used internally for floor and roof joists. Lengths commonly available are 3.0, 3.6, 4.2 and 4.8 meter.
What is C24 Timber?
C24 graded premium structural timber offers greater strength than C16 timber, making it a more demanding grade that can handle higher loads and wider spans. It is the better-quality structural option because it can take up to 50% longer for these timbers to grow, meaning that they have more growth rings. The more growth rings a piece of wood has, the higher its overall density, which in turn means that it has greater natural durability and improved stability. The tighter the growth rings of the wood, the better-quality piece of wood that you are dealing with.